util-linux/0001-libmount-fix-user-mount-by-root-for-mount.-type-help.patch

51 lines
1.8 KiB
Diff
Raw Normal View History

From 17206c059dc2e42e7081079b76eafda68cc9a5b8 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 26 Mar 2013 16:05:07 +0100
Subject: [PATCH] libmount: fix user-mount by root for mount.<type> helpers
Append options like "exec" "suid" and "dev" to mount.<type> helpers
command line if the options are in fstab. This is relevant for root
user who calls mount(8) for fstab entries with "user,exec" etc.
Signed-off-by: Karel Zak <kzak@redhat.com>
---
libmount/src/context_mount.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/libmount/src/context_mount.c b/libmount/src/context_mount.c
index 00738b4..3b280ab 100644
--- a/libmount/src/context_mount.c
+++ b/libmount/src/context_mount.c
@@ -275,6 +275,28 @@ static int generate_helper_optstr(struct libmnt_context *cxt, char **optstr)
if (!*optstr)
return -ENOMEM;
+ if (cxt->user_mountflags & MNT_MS_USER) {
+ /*
+ * This is unnecessary for real user-mounts as mount.<type>
+ * helpers have to always follow fstab rather than mount
+ * options on command line.
+ *
+ * But if you call mount.<type> as root then the helper follows
+ * command line. If there is (for example) "user,exec" in fstab
+ * then we have to manually append the "exec" back to the options
+ * string, bacause there is nothing like MS_EXEC (we have only
+ * MS_NOEXEC in mount flags and we don't care about the original
+ * mount string in libmount for VFS options).
+ */
+ if (!(cxt->mountflags & MS_NOEXEC))
+ mnt_optstr_append_option(optstr, "exec", NULL);
+ if (!(cxt->mountflags & MS_NOSUID))
+ mnt_optstr_append_option(optstr, "suid", NULL);
+ if (!(cxt->mountflags & MS_NODEV))
+ mnt_optstr_append_option(optstr, "dev", NULL);
+ }
+
+
if (cxt->flags & MNT_FL_SAVED_USER)
rc = mnt_optstr_set_option(optstr, "user", cxt->orig_user);
if (rc)
--
1.8.1.4