1092 lines
34 KiB
Diff
1092 lines
34 KiB
Diff
From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Mon, 27 Jan 2020 19:01:23 +0000
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Subject: [PATCH] virtiofsd: check input buffer size in fuse_lowlevel.c ops
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Each FUSE operation involves parsing the input buffer. Currently the
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code assumes the input buffer is large enough for the expected
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arguments. This patch uses fuse_mbuf_iter to check the size.
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Most operations are simple to convert. Some are more complicated due to
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variable-length inputs or different sizes depending on the protocol
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version.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Reviewed-by: Sergio Lopez <slp@redhat.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit 70995754416eb4491c31607fe380a83cfd25a087)
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---
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tools/virtiofsd/fuse_lowlevel.c | 581 +++++++++++++++++++++++++-------
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1 file changed, 456 insertions(+), 125 deletions(-)
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diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
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index 611e8b0354..02e1d83038 100644
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--- a/tools/virtiofsd/fuse_lowlevel.c
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+++ b/tools/virtiofsd/fuse_lowlevel.c
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@@ -19,6 +19,7 @@
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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+#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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@@ -27,7 +28,6 @@
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#include <unistd.h>
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-#define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg)))
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#define OFFSET_MAX 0x7fffffffffffffffLL
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struct fuse_pollhandle {
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@@ -706,9 +706,14 @@ int fuse_reply_lseek(fuse_req_t req, off_t off)
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return send_reply_ok(req, &arg, sizeof(arg));
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}
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-static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_lookup(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- char *name = (char *)inarg;
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+ const char *name = fuse_mbuf_iter_advance_str(iter);
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+ if (!name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.lookup) {
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req->se->op.lookup(req, nodeid, name);
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@@ -717,9 +722,16 @@ static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_forget(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_forget_in *arg = (struct fuse_forget_in *)inarg;
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+ struct fuse_forget_in *arg;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.forget) {
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req->se->op.forget(req, nodeid, arg->nlookup);
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@@ -729,20 +741,48 @@ static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
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- const void *inarg)
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_batch_forget_in *arg = (void *)inarg;
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- struct fuse_forget_one *param = (void *)PARAM(arg);
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- unsigned int i;
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+ struct fuse_batch_forget_in *arg;
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+ struct fuse_forget_data *forgets;
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+ size_t scount;
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(void)nodeid;
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_none(req);
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+ return;
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+ }
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+
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+ /*
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+ * Prevent integer overflow. The compiler emits the following warning
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+ * unless we use the scount local variable:
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+ *
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+ * error: comparison is always false due to limited range of data type
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+ * [-Werror=type-limits]
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+ *
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+ * This may be true on 64-bit hosts but we need this check for 32-bit
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+ * hosts.
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+ */
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+ scount = arg->count;
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+ if (scount > SIZE_MAX / sizeof(forgets[0])) {
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+ fuse_reply_none(req);
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+ return;
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+ }
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+
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+ forgets = fuse_mbuf_iter_advance(iter, arg->count * sizeof(forgets[0]));
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+ if (!forgets) {
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+ fuse_reply_none(req);
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+ return;
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+ }
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+
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if (req->se->op.forget_multi) {
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- req->se->op.forget_multi(req, arg->count,
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- (struct fuse_forget_data *)param);
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+ req->se->op.forget_multi(req, arg->count, forgets);
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} else if (req->se->op.forget) {
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+ unsigned int i;
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+
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for (i = 0; i < arg->count; i++) {
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- struct fuse_forget_one *forget = ¶m[i];
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struct fuse_req *dummy_req;
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dummy_req = fuse_ll_alloc_req(req->se);
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@@ -754,7 +794,7 @@ static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
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dummy_req->ctx = req->ctx;
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dummy_req->ch = NULL;
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- req->se->op.forget(dummy_req, forget->nodeid, forget->nlookup);
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+ req->se->op.forget(dummy_req, forgets[i].ino, forgets[i].nlookup);
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}
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fuse_reply_none(req);
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} else {
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@@ -762,12 +802,19 @@ static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
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}
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}
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-static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_getattr(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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struct fuse_file_info *fip = NULL;
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struct fuse_file_info fi;
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- struct fuse_getattr_in *arg = (struct fuse_getattr_in *)inarg;
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+ struct fuse_getattr_in *arg;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (arg->getattr_flags & FUSE_GETATTR_FH) {
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memset(&fi, 0, sizeof(fi));
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@@ -782,14 +829,21 @@ static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_setattr(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_setattr_in *arg = (struct fuse_setattr_in *)inarg;
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-
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if (req->se->op.setattr) {
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+ struct fuse_setattr_in *arg;
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struct fuse_file_info *fi = NULL;
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struct fuse_file_info fi_store;
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struct stat stbuf;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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+
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memset(&stbuf, 0, sizeof(stbuf));
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convert_attr(arg, &stbuf);
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if (arg->valid & FATTR_FH) {
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@@ -810,9 +864,16 @@ static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_access(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_access_in *arg = (struct fuse_access_in *)inarg;
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+ struct fuse_access_in *arg;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.access) {
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req->se->op.access(req, nodeid, arg->mask);
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@@ -821,9 +882,10 @@ static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_readlink(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- (void)inarg;
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+ (void)iter;
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if (req->se->op.readlink) {
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req->se->op.readlink(req, nodeid);
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@@ -832,10 +894,18 @@ static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_mknod(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_mknod_in *arg = (struct fuse_mknod_in *)inarg;
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- char *name = PARAM(arg);
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+ struct fuse_mknod_in *arg;
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+ const char *name;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ name = fuse_mbuf_iter_advance_str(iter);
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+ if (!arg || !name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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req->ctx.umask = arg->umask;
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@@ -846,22 +916,37 @@ static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *)inarg;
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+ struct fuse_mkdir_in *arg;
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+ const char *name;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ name = fuse_mbuf_iter_advance_str(iter);
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+ if (!arg || !name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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req->ctx.umask = arg->umask;
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if (req->se->op.mkdir) {
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- req->se->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
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+ req->se->op.mkdir(req, nodeid, name, arg->mode);
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} else {
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fuse_reply_err(req, ENOSYS);
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}
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}
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-static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_unlink(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- char *name = (char *)inarg;
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+ const char *name = fuse_mbuf_iter_advance_str(iter);
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+
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+ if (!name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.unlink) {
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req->se->op.unlink(req, nodeid, name);
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@@ -870,9 +955,15 @@ static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- char *name = (char *)inarg;
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+ const char *name = fuse_mbuf_iter_advance_str(iter);
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+
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+ if (!name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.rmdir) {
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req->se->op.rmdir(req, nodeid, name);
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@@ -881,10 +972,16 @@ static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_symlink(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- char *name = (char *)inarg;
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- char *linkname = ((char *)inarg) + strlen((char *)inarg) + 1;
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+ const char *name = fuse_mbuf_iter_advance_str(iter);
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+ const char *linkname = fuse_mbuf_iter_advance_str(iter);
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+
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+ if (!name || !linkname) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.symlink) {
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req->se->op.symlink(req, linkname, nodeid, name);
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@@ -893,11 +990,20 @@ static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_rename(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_rename_in *arg = (struct fuse_rename_in *)inarg;
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- char *oldname = PARAM(arg);
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- char *newname = oldname + strlen(oldname) + 1;
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+ struct fuse_rename_in *arg;
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+ const char *oldname;
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+ const char *newname;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ oldname = fuse_mbuf_iter_advance_str(iter);
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+ newname = fuse_mbuf_iter_advance_str(iter);
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+ if (!arg || !oldname || !newname) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.rename) {
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req->se->op.rename(req, nodeid, oldname, arg->newdir, newname, 0);
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@@ -906,11 +1012,20 @@ static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_rename2(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_rename2(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_rename2_in *arg = (struct fuse_rename2_in *)inarg;
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- char *oldname = PARAM(arg);
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- char *newname = oldname + strlen(oldname) + 1;
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+ struct fuse_rename2_in *arg;
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+ const char *oldname;
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+ const char *newname;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ oldname = fuse_mbuf_iter_advance_str(iter);
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+ newname = fuse_mbuf_iter_advance_str(iter);
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+ if (!arg || !oldname || !newname) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.rename) {
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req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
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@@ -920,24 +1035,38 @@ static void do_rename2(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_link(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_link_in *arg = (struct fuse_link_in *)inarg;
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+ struct fuse_link_in *arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ const char *name = fuse_mbuf_iter_advance_str(iter);
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+
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+ if (!arg || !name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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if (req->se->op.link) {
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- req->se->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
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+ req->se->op.link(req, arg->oldnodeid, nodeid, name);
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} else {
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fuse_reply_err(req, ENOSYS);
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}
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}
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-static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_create(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_create_in *arg = (struct fuse_create_in *)inarg;
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-
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if (req->se->op.create) {
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+ struct fuse_create_in *arg;
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struct fuse_file_info fi;
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- char *name = PARAM(arg);
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+ const char *name;
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+
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ name = fuse_mbuf_iter_advance_str(iter);
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+ if (!arg || !name) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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memset(&fi, 0, sizeof(fi));
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fi.flags = arg->flags;
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@@ -950,11 +1079,18 @@ static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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}
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}
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-static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
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+static void do_open(fuse_req_t req, fuse_ino_t nodeid,
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+ struct fuse_mbuf_iter *iter)
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{
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- struct fuse_open_in *arg = (struct fuse_open_in *)inarg;
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+ struct fuse_open_in *arg;
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struct fuse_file_info fi;
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+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
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+ if (!arg) {
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+ fuse_reply_err(req, EINVAL);
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+ return;
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+ }
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+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
|
|
@@ -965,13 +1101,15 @@ static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_read(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
|
|
-
|
|
if (req->se->op.read) {
|
|
+ struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->lock_owner;
|
|
@@ -982,11 +1120,24 @@ static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_write(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_write_in *arg = (struct fuse_write_in *)inarg;
|
|
+ struct fuse_write_in *arg;
|
|
struct fuse_file_info fi;
|
|
- char *param;
|
|
+ const char *param;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ param = fuse_mbuf_iter_advance(iter, arg->size);
|
|
+ if (!param) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
@@ -994,7 +1145,6 @@ static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
|
|
fi.lock_owner = arg->lock_owner;
|
|
fi.flags = arg->flags;
|
|
- param = PARAM(arg);
|
|
|
|
if (req->se->op.write) {
|
|
req->se->op.write(req, nodeid, param, arg->size, arg->offset, &fi);
|
|
@@ -1052,11 +1202,18 @@ static void do_write_buf(fuse_req_t req, fuse_ino_t nodeid,
|
|
se->op.write_buf(req, nodeid, pbufv, arg->offset, &fi);
|
|
}
|
|
|
|
-static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_flush(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_flush_in *arg = (struct fuse_flush_in *)inarg;
|
|
+ struct fuse_flush_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.flush = 1;
|
|
@@ -1069,19 +1226,26 @@ static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_release(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_release_in *arg = (struct fuse_release_in *)inarg;
|
|
+ struct fuse_release_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
fi.fh = arg->fh;
|
|
fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
|
|
fi.lock_owner = arg->lock_owner;
|
|
+
|
|
if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
|
|
fi.flock_release = 1;
|
|
- fi.lock_owner = arg->lock_owner;
|
|
}
|
|
|
|
if (req->se->op.release) {
|
|
@@ -1091,11 +1255,19 @@ static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_fsync(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_fsync_in *arg = (struct fuse_fsync_in *)inarg;
|
|
+ struct fuse_fsync_in *arg;
|
|
struct fuse_file_info fi;
|
|
- int datasync = arg->fsync_flags & 1;
|
|
+ int datasync;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+ datasync = arg->fsync_flags & 1;
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
@@ -1111,11 +1283,18 @@ static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_opendir(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_open_in *arg = (struct fuse_open_in *)inarg;
|
|
+ struct fuse_open_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
|
|
@@ -1126,11 +1305,18 @@ static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_readdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
|
|
+ struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
@@ -1141,11 +1327,18 @@ static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
|
|
+ struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
@@ -1156,11 +1349,18 @@ static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_release_in *arg = (struct fuse_release_in *)inarg;
|
|
+ struct fuse_release_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
fi.fh = arg->fh;
|
|
@@ -1172,11 +1372,19 @@ static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_fsync_in *arg = (struct fuse_fsync_in *)inarg;
|
|
+ struct fuse_fsync_in *arg;
|
|
struct fuse_file_info fi;
|
|
- int datasync = arg->fsync_flags & 1;
|
|
+ int datasync;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+ datasync = arg->fsync_flags & 1;
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
@@ -1188,10 +1396,11 @@ static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_statfs(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
(void)nodeid;
|
|
- (void)inarg;
|
|
+ (void)iter;
|
|
|
|
if (req->se->op.statfs) {
|
|
req->se->op.statfs(req, nodeid);
|
|
@@ -1204,11 +1413,25 @@ static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_setxattr_in *arg = (struct fuse_setxattr_in *)inarg;
|
|
- char *name = PARAM(arg);
|
|
- char *value = name + strlen(name) + 1;
|
|
+ struct fuse_setxattr_in *arg;
|
|
+ const char *name;
|
|
+ const char *value;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ name = fuse_mbuf_iter_advance_str(iter);
|
|
+ if (!arg || !name) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ value = fuse_mbuf_iter_advance(iter, arg->size);
|
|
+ if (!value) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
if (req->se->op.setxattr) {
|
|
req->se->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
|
|
@@ -1217,20 +1440,36 @@ static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *)inarg;
|
|
+ struct fuse_getxattr_in *arg;
|
|
+ const char *name;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ name = fuse_mbuf_iter_advance_str(iter);
|
|
+ if (!arg || !name) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
if (req->se->op.getxattr) {
|
|
- req->se->op.getxattr(req, nodeid, PARAM(arg), arg->size);
|
|
+ req->se->op.getxattr(req, nodeid, name, arg->size);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
-static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *)inarg;
|
|
+ struct fuse_getxattr_in *arg;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
if (req->se->op.listxattr) {
|
|
req->se->op.listxattr(req, nodeid, arg->size);
|
|
@@ -1239,9 +1478,15 @@ static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- char *name = (char *)inarg;
|
|
+ const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
+
|
|
+ if (!name) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
if (req->se->op.removexattr) {
|
|
req->se->op.removexattr(req, nodeid, name);
|
|
@@ -1265,12 +1510,19 @@ static void convert_fuse_file_lock(struct fuse_file_lock *fl,
|
|
flock->l_pid = fl->pid;
|
|
}
|
|
|
|
-static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_getlk(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_lk_in *arg = (struct fuse_lk_in *)inarg;
|
|
+ struct fuse_lk_in *arg;
|
|
struct fuse_file_info fi;
|
|
struct flock flock;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->owner;
|
|
@@ -1284,12 +1536,18 @@ static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
|
|
static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
|
|
- const void *inarg, int sleep)
|
|
+ struct fuse_mbuf_iter *iter, int sleep)
|
|
{
|
|
- struct fuse_lk_in *arg = (struct fuse_lk_in *)inarg;
|
|
+ struct fuse_lk_in *arg;
|
|
struct fuse_file_info fi;
|
|
struct flock flock;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->owner;
|
|
@@ -1327,14 +1585,16 @@ static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
|
|
}
|
|
}
|
|
|
|
-static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_setlk(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- do_setlk_common(req, nodeid, inarg, 0);
|
|
+ do_setlk_common(req, nodeid, iter, 0);
|
|
}
|
|
|
|
-static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- do_setlk_common(req, nodeid, inarg, 1);
|
|
+ do_setlk_common(req, nodeid, iter, 1);
|
|
}
|
|
|
|
static int find_interrupted(struct fuse_session *se, struct fuse_req *req)
|
|
@@ -1379,12 +1639,20 @@ static int find_interrupted(struct fuse_session *se, struct fuse_req *req)
|
|
return 0;
|
|
}
|
|
|
|
-static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_interrupt_in *arg = (struct fuse_interrupt_in *)inarg;
|
|
+ struct fuse_interrupt_in *arg;
|
|
struct fuse_session *se = req->se;
|
|
|
|
(void)nodeid;
|
|
+
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
if (se->debug) {
|
|
fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
|
|
(unsigned long long)arg->unique);
|
|
@@ -1425,9 +1693,15 @@ static struct fuse_req *check_interrupt(struct fuse_session *se,
|
|
}
|
|
}
|
|
|
|
-static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_bmap(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_bmap_in *arg = (struct fuse_bmap_in *)inarg;
|
|
+ struct fuse_bmap_in *arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
|
|
if (req->se->op.bmap) {
|
|
req->se->op.bmap(req, nodeid, arg->blocksize, arg->block);
|
|
@@ -1436,18 +1710,34 @@ static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_ioctl_in *arg = (struct fuse_ioctl_in *)inarg;
|
|
- unsigned int flags = arg->flags;
|
|
- void *in_buf = arg->in_size ? PARAM(arg) : NULL;
|
|
+ struct fuse_ioctl_in *arg;
|
|
+ unsigned int flags;
|
|
+ void *in_buf = NULL;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ flags = arg->flags;
|
|
if (flags & FUSE_IOCTL_DIR && !(req->se->conn.want & FUSE_CAP_IOCTL_DIR)) {
|
|
fuse_reply_err(req, ENOTTY);
|
|
return;
|
|
}
|
|
|
|
+ if (arg->in_size) {
|
|
+ in_buf = fuse_mbuf_iter_advance(iter, arg->in_size);
|
|
+ if (!in_buf) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
@@ -1468,11 +1758,18 @@ void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
|
|
free(ph);
|
|
}
|
|
|
|
-static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_poll(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_poll_in *arg = (struct fuse_poll_in *)inarg;
|
|
+ struct fuse_poll_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.poll_events = arg->events;
|
|
@@ -1496,11 +1793,18 @@ static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_fallocate_in *arg = (struct fuse_fallocate_in *)inarg;
|
|
+ struct fuse_fallocate_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
@@ -1513,12 +1817,17 @@ static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
|
|
static void do_copy_file_range(fuse_req_t req, fuse_ino_t nodeid_in,
|
|
- const void *inarg)
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_copy_file_range_in *arg =
|
|
- (struct fuse_copy_file_range_in *)inarg;
|
|
+ struct fuse_copy_file_range_in *arg;
|
|
struct fuse_file_info fi_in, fi_out;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
memset(&fi_in, 0, sizeof(fi_in));
|
|
fi_in.fh = arg->fh_in;
|
|
|
|
@@ -1535,11 +1844,17 @@ static void do_copy_file_range(fuse_req_t req, fuse_ino_t nodeid_in,
|
|
}
|
|
}
|
|
|
|
-static void do_lseek(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_lseek(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_lseek_in *arg = (struct fuse_lseek_in *)inarg;
|
|
+ struct fuse_lseek_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
@@ -1550,15 +1865,33 @@ static void do_lseek(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
}
|
|
}
|
|
|
|
-static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_init(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
- struct fuse_init_in *arg = (struct fuse_init_in *)inarg;
|
|
+ size_t compat_size = offsetof(struct fuse_init_in, max_readahead);
|
|
+ struct fuse_init_in *arg;
|
|
struct fuse_init_out outarg;
|
|
struct fuse_session *se = req->se;
|
|
size_t bufsize = se->bufsize;
|
|
size_t outargsize = sizeof(outarg);
|
|
|
|
(void)nodeid;
|
|
+
|
|
+ /* First consume the old fields... */
|
|
+ arg = fuse_mbuf_iter_advance(iter, compat_size);
|
|
+ if (!arg) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ /* ...and now consume the new fields. */
|
|
+ if (arg->major == 7 && arg->minor >= 6) {
|
|
+ if (!fuse_mbuf_iter_advance(iter, sizeof(*arg) - compat_size)) {
|
|
+ fuse_reply_err(req, EINVAL);
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
if (se->debug) {
|
|
fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
|
|
if (arg->major == 7 && arg->minor >= 6) {
|
|
@@ -1791,12 +2124,13 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
send_reply_ok(req, &outarg, outargsize);
|
|
}
|
|
|
|
-static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
|
|
+static void do_destroy(fuse_req_t req, fuse_ino_t nodeid,
|
|
+ struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_session *se = req->se;
|
|
|
|
(void)nodeid;
|
|
- (void)inarg;
|
|
+ (void)iter;
|
|
|
|
se->got_destroy = 1;
|
|
if (se->op.destroy) {
|
|
@@ -1976,7 +2310,7 @@ int fuse_req_interrupted(fuse_req_t req)
|
|
}
|
|
|
|
static struct {
|
|
- void (*func)(fuse_req_t, fuse_ino_t, const void *);
|
|
+ void (*func)(fuse_req_t, fuse_ino_t, struct fuse_mbuf_iter *);
|
|
const char *name;
|
|
} fuse_ll_ops[] = {
|
|
[FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
|
|
@@ -2060,7 +2394,6 @@ void fuse_session_process_buf_int(struct fuse_session *se,
|
|
const struct fuse_buf *buf = bufv->buf;
|
|
struct fuse_mbuf_iter iter = FUSE_MBUF_ITER_INIT(buf);
|
|
struct fuse_in_header *in;
|
|
- const void *inarg;
|
|
struct fuse_req *req;
|
|
int err;
|
|
|
|
@@ -2138,13 +2471,11 @@ void fuse_session_process_buf_int(struct fuse_session *se,
|
|
}
|
|
}
|
|
|
|
- inarg = (void *)&in[1];
|
|
if (in->opcode == FUSE_WRITE && se->op.write_buf) {
|
|
do_write_buf(req, in->nodeid, &iter, bufv);
|
|
} else {
|
|
- fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
|
|
+ fuse_ll_ops[in->opcode].func(req, in->nodeid, &iter);
|
|
}
|
|
-
|
|
return;
|
|
|
|
reply_err:
|