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CVE-2017-8112: vmw_pvscsi: infinite loop in pvscsi_log2 (bz #1445622)

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CVE-2017-8309: audio: host memory lekage via capture buffer (bz #1446520)
CVE-2017-8379: input: host memory lekage via keyboard events (bz #1446560)
CVE-2017-8380: scsi: megasas: out-of-bounds read in megasas_mmio_write (bz #1446578)
CVE-2017-7493: 9pfs: guest privilege escalation in virtfs mapped-file mode (bz #1451711)
CVE-2017-9503: megasas: null pointer dereference while processing megasas command (bz #1459478)
CVE-2017-10806: usb-redirect: stack buffer overflow in debug logging (bz #1468497)
CVE-2017-9524: nbd: segfault due to client non-negotiation (bz #1460172)
CVE-2017-10664: qemu-nbd: server breaks with SIGPIPE upon client abort (bz #1466192)
This commit is contained in:
Cole Robinson 2017-07-12 18:16:27 -04:00
parent ecbacbf654
commit 61973ed6f5
17 changed files with 1437 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
0001-vmw_pvscsi-check-message-ring-page-count-at-initiali.patch Normal file
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@ -0,0 +1,30 @@
From: P J P <ppandit@redhat.com>
Date: Tue, 25 Apr 2017 18:36:23 +0530
Subject: [PATCH] vmw_pvscsi: check message ring page count at initialisation
A guest could set the message ring page count to zero, resulting in
infinite loop. Add check to avoid it.
Reported-by: YY Z <bigbird475958471@gmail.com>
Signed-off-by: P J P <ppandit@redhat.com>
Message-Id: <20170425130623.3649-1-ppandit@redhat.com>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit f68826989cd4d1217797251339579c57b3c0934e)
---
hw/scsi/vmw_pvscsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c
index 75575461e2..4a106da856 100644
--- a/hw/scsi/vmw_pvscsi.c
+++ b/hw/scsi/vmw_pvscsi.c
@@ -202,7 +202,7 @@ pvscsi_ring_init_msg(PVSCSIRingInfo *m, PVSCSICmdDescSetupMsgRing *ri)
uint32_t len_log2;
uint32_t ring_size;
- if (ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES) {
+ if (!ri->numPages || ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES) {
return -1;
}
ring_size = ri->numPages * PVSCSI_MAX_NUM_MSG_ENTRIES_PER_PAGE;

35
0002-audio-release-capture-buffers.patch Normal file
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@ -0,0 +1,35 @@
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 28 Apr 2017 09:56:12 +0200
Subject: [PATCH] audio: release capture buffers
AUD_add_capture() allocates two buffers which are never released.
Add the missing calls to AUD_del_capture().
Impact: Allows vnc clients to exhaust host memory by repeatedly
starting and stopping audio capture.
Fixes: CVE-2017-8309
Cc: P J P <ppandit@redhat.com>
Cc: Huawei PSIRT <PSIRT@huawei.com>
Reported-by: "Jiangxin (hunter, SCC)" <jiangxin1@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 20170428075612.9997-1-kraxel@redhat.com
(cherry picked from commit 3268a845f41253fb55852a8429c32b50f36f349a)
---
audio/audio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/audio/audio.c b/audio/audio.c
index c8898d8422..beafed209b 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -2028,6 +2028,8 @@ void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
sw = sw1;
}
QLIST_REMOVE (cap, entries);
+ g_free (cap->hw.mix_buf);
+ g_free (cap->buf);
g_free (cap);
}
return;

87
0003-input-limit-kbd-queue-depth.patch Normal file
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@ -0,0 +1,87 @@
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 28 Apr 2017 10:42:37 +0200
Subject: [PATCH] input: limit kbd queue depth
Apply a limit to the number of items we accept into the keyboard queue.
Impact: Without this limit vnc clients can exhaust host memory by
sending keyboard events faster than qemu feeds them to the guest.
Fixes: CVE-2017-8379
Cc: P J P <ppandit@redhat.com>
Cc: Huawei PSIRT <PSIRT@huawei.com>
Reported-by: jiangxin1@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170428084237.23960-1-kraxel@redhat.com
(cherry picked from commit fa18f36a461984eae50ab957e47ec78dae3c14fc)
---
ui/input.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/ui/input.c b/ui/input.c
index ed88cda6d6..fb1f404095 100644
--- a/ui/input.c
+++ b/ui/input.c
@@ -41,6 +41,8 @@ static QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue) kbd_queue =
QTAILQ_HEAD_INITIALIZER(kbd_queue);
static QEMUTimer *kbd_timer;
static uint32_t kbd_default_delay_ms = 10;
+static uint32_t queue_count;
+static uint32_t queue_limit = 1024;
QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
QemuInputHandler *handler)
@@ -268,6 +270,7 @@ static void qemu_input_queue_process(void *opaque)
break;
}
QTAILQ_REMOVE(queue, item, node);
+ queue_count--;
g_free(item);
}
}
@@ -282,6 +285,7 @@ static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue,
item->delay_ms = delay_ms;
item->timer = timer;
QTAILQ_INSERT_TAIL(queue, item, node);
+ queue_count++;
if (start_timer) {
timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
@@ -298,6 +302,7 @@ static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue,
item->src = src;
item->evt = evt;
QTAILQ_INSERT_TAIL(queue, item, node);
+ queue_count++;
}
static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue)
@@ -306,6 +311,7 @@ static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue)
item->type = QEMU_INPUT_QUEUE_SYNC;
QTAILQ_INSERT_TAIL(queue, item, node);
+ queue_count++;
}
void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt)
@@ -381,7 +387,7 @@ void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down)
qemu_input_event_send(src, evt);
qemu_input_event_sync();
qapi_free_InputEvent(evt);
- } else {
+ } else if (queue_count < queue_limit) {
qemu_input_queue_event(&kbd_queue, src, evt);
qemu_input_queue_sync(&kbd_queue);
}
@@ -409,8 +415,10 @@ void qemu_input_event_send_key_delay(uint32_t delay_ms)
kbd_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, qemu_input_queue_process,
&kbd_queue);
}
- qemu_input_queue_delay(&kbd_queue, kbd_timer,
- delay_ms ? delay_ms : kbd_default_delay_ms);
+ if (queue_count < queue_limit) {
+ qemu_input_queue_delay(&kbd_queue, kbd_timer,
+ delay_ms ? delay_ms : kbd_default_delay_ms);
+ }
}
InputEvent *qemu_input_event_new_btn(InputButton btn, bool down)

42
0004-scsi-avoid-an-off-by-one-error-in-megasas_mmio_write.patch Normal file
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@ -0,0 +1,42 @@
From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Mon, 24 Apr 2017 17:36:34 +0530
Subject: [PATCH] scsi: avoid an off-by-one error in megasas_mmio_write
While reading magic sequence(MFI_SEQ) in megasas_mmio_write,
an off-by-one error could occur as 's->adp_reset' index is not
reset after reading the last sequence.
Reported-by: YY Z <bigbird475958471@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20170424120634.12268-1-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 24dfa9fa2f90a95ac33c7372de4f4f2c8a2c141f)
---
hw/scsi/megasas.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 84b8caf901..804122ab05 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -2138,15 +2138,15 @@ static void megasas_mmio_write(void *opaque, hwaddr addr,
case MFI_SEQ:
trace_megasas_mmio_writel("MFI_SEQ", val);
/* Magic sequence to start ADP reset */
- if (adp_reset_seq[s->adp_reset] == val) {
- s->adp_reset++;
+ if (adp_reset_seq[s->adp_reset++] == val) {
+ if (s->adp_reset == 6) {
+ s->adp_reset = 0;
+ s->diag = MFI_DIAG_WRITE_ENABLE;
+ }
} else {
s->adp_reset = 0;
s->diag = 0;
}
- if (s->adp_reset == 6) {
- s->diag = MFI_DIAG_WRITE_ENABLE;
- }
break;
case MFI_DIAG:
trace_megasas_mmio_writel("MFI_DIAG", val);

171
0005-9pfs-local-forbid-client-access-to-metadata-CVE-2017.patch Normal file
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@ -0,0 +1,171 @@
From: Greg Kurz <groug@kaod.org>
Date: Fri, 5 May 2017 14:48:08 +0200
Subject: [PATCH] 9pfs: local: forbid client access to metadata (CVE-2017-7493)
When using the mapped-file security mode, we shouldn't let the client mess
with the metadata. The current code already tries to hide the metadata dir
from the client by skipping it in local_readdir(). But the client can still
access or modify it through several other operations. This can be used to
escalate privileges in the guest.
Affected backend operations are:
- local_mknod()
- local_mkdir()
- local_open2()
- local_symlink()
- local_link()
- local_unlinkat()
- local_renameat()
- local_rename()
- local_name_to_path()
Other operations are safe because they are only passed a fid path, which
is computed internally in local_name_to_path().
This patch converts all the functions listed above to fail and return
EINVAL when being passed the name of the metadata dir. This may look
like a poor choice for errno, but there's no such thing as an illegal
path name on Linux and I could not think of anything better.
This fixes CVE-2017-7493.
Reported-by: Leo Gaspard <leo@gaspard.io>
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit 7a95434e0ca8a037fd8aa1a2e2461f92585eb77b)
---
hw/9pfs/9p-local.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 56 insertions(+), 2 deletions(-)
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index f3ebca4f7a..a2486566af 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -452,6 +452,11 @@ static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs)
return telldir(fs->dir.stream);
}
+static bool local_is_mapped_file_metadata(FsContext *fs_ctx, const char *name)
+{
+ return !strcmp(name, VIRTFS_META_DIR);
+}
+
static struct dirent *local_readdir(FsContext *ctx, V9fsFidOpenState *fs)
{
struct dirent *entry;
@@ -465,8 +470,8 @@ again:
if (ctx->export_flags & V9FS_SM_MAPPED) {
entry->d_type = DT_UNKNOWN;
} else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
- if (!strcmp(entry->d_name, VIRTFS_META_DIR)) {
- /* skp the meta data directory */
+ if (local_is_mapped_file_metadata(ctx, entry->d_name)) {
+ /* skip the meta data directory */
goto again;
}
entry->d_type = DT_UNKNOWN;
@@ -559,6 +564,12 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
int err = -1;
int dirfd;
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(fs_ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
dirfd = local_opendir_nofollow(fs_ctx, dir_path->data);
if (dirfd == -1) {
return -1;
@@ -605,6 +616,12 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
int err = -1;
int dirfd;
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(fs_ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
dirfd = local_opendir_nofollow(fs_ctx, dir_path->data);
if (dirfd == -1) {
return -1;
@@ -694,6 +711,12 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int err = -1;
int dirfd;
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(fs_ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
/*
* Mark all the open to not follow symlinks
*/
@@ -752,6 +775,12 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
int err = -1;
int dirfd;
+ if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(fs_ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
dirfd = local_opendir_nofollow(fs_ctx, dir_path->data);
if (dirfd == -1) {
return -1;
@@ -826,6 +855,12 @@ static int local_link(FsContext *ctx, V9fsPath *oldpath,
int ret = -1;
int odirfd, ndirfd;
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
odirfd = local_opendir_nofollow(ctx, odirpath);
if (odirfd == -1) {
goto out;
@@ -1096,6 +1131,12 @@ static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path,
const char *name, V9fsPath *target)
{
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
if (dir_path) {
v9fs_path_sprintf(target, "%s/%s", dir_path->data, name);
} else if (strcmp(name, "/")) {
@@ -1116,6 +1157,13 @@ static int local_renameat(FsContext *ctx, V9fsPath *olddir,
int ret;
int odirfd, ndirfd;
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ (local_is_mapped_file_metadata(ctx, old_name) ||
+ local_is_mapped_file_metadata(ctx, new_name))) {
+ errno = EINVAL;
+ return -1;
+ }
+
odirfd = local_opendir_nofollow(ctx, olddir->data);
if (odirfd == -1) {
return -1;
@@ -1206,6 +1254,12 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
int ret;
int dirfd;
+ if (ctx->export_flags & V9FS_SM_MAPPED_FILE &&
+ local_is_mapped_file_metadata(ctx, name)) {
+ errno = EINVAL;
+ return -1;
+ }
+
dirfd = local_opendir_nofollow(ctx, dir->data);
if (dirfd == -1) {
return -1;

30
0006-megasas-do-not-read-sense-length-more-than-once-from.patch Normal file
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@ -0,0 +1,30 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:18:39 +0200
Subject: [PATCH] megasas: do not read sense length more than once from frame
Avoid TOC-TOU bugs depending on how the compiler behaves.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 134550bf81a026e18cf58b81e2c2cceaf516f92e)
---
hw/scsi/megasas.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 804122ab05..1888118e5f 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -309,9 +309,11 @@ static int megasas_build_sense(MegasasCmd *cmd, uint8_t *sense_ptr,
PCIDevice *pcid = PCI_DEVICE(cmd->state);
uint32_t pa_hi = 0, pa_lo;
hwaddr pa;
+ int frame_sense_len;
- if (sense_len > cmd->frame->header.sense_len) {
- sense_len = cmd->frame->header.sense_len;
+ frame_sense_len = cmd->frame->header.sense_len;
+ if (sense_len > frame_sense_len) {
+ sense_len = frame_sense_len;
}
if (sense_len) {
pa_lo = le32_to_cpu(cmd->frame->pass.sense_addr_lo);

37
0007-megasas-do-not-read-iovec-count-more-than-once-from-.patch Normal file
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@ -0,0 +1,37 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:18:57 +0200
Subject: [PATCH] megasas: do not read iovec count more than once from frame
Avoid TOC-TOU bugs depending on how the compiler behaves.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 24c0c77af515acbf0f9705e8096f33ef24d37430)
---
hw/scsi/megasas.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 1888118e5f..c353118882 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -675,15 +675,16 @@ out:
static int megasas_map_dcmd(MegasasState *s, MegasasCmd *cmd)
{
dma_addr_t iov_pa, iov_size;
+ int iov_count;
cmd->flags = le16_to_cpu(cmd->frame->header.flags);
- if (!cmd->frame->header.sge_count) {
+ iov_count = cmd->frame->header.sge_count;
+ if (!iov_count) {
trace_megasas_dcmd_zero_sge(cmd->index);
cmd->iov_size = 0;
return 0;
- } else if (cmd->frame->header.sge_count > 1) {
- trace_megasas_dcmd_invalid_sge(cmd->index,
- cmd->frame->header.sge_count);
+ } else if (iov_count > 1) {
+ trace_megasas_dcmd_invalid_sge(cmd->index, iov_count);
cmd->iov_size = 0;
return -EINVAL;
}

111
0008-megasas-do-not-read-DCMD-opcode-more-than-once-from-.patch Normal file
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@ -0,0 +1,111 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:18:23 +0200
Subject: [PATCH] megasas: do not read DCMD opcode more than once from frame
Avoid TOC-TOU bugs by storing the DCMD opcode in the MegasasCmd
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 5104fac8539eaf155fc6de93e164be43e1e62242)
---
hw/scsi/megasas.c | 25 +++++++++++--------------
1 file changed, 11 insertions(+), 14 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index c353118882..a3f75c1650 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -63,6 +63,7 @@ typedef struct MegasasCmd {
hwaddr pa;
hwaddr pa_size;
+ uint32_t dcmd_opcode;
union mfi_frame *frame;
SCSIRequest *req;
QEMUSGList qsg;
@@ -513,6 +514,7 @@ static MegasasCmd *megasas_enqueue_frame(MegasasState *s,
cmd->context &= (uint64_t)0xFFFFFFFF;
}
cmd->count = count;
+ cmd->dcmd_opcode = -1;
s->busy++;
if (s->consumer_pa) {
@@ -1562,22 +1564,21 @@ static const struct dcmd_cmd_tbl_t {
static int megasas_handle_dcmd(MegasasState *s, MegasasCmd *cmd)
{
- int opcode;
int retval = 0;
size_t len;
const struct dcmd_cmd_tbl_t *cmdptr = dcmd_cmd_tbl;
- opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
- trace_megasas_handle_dcmd(cmd->index, opcode);
+ cmd->dcmd_opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
+ trace_megasas_handle_dcmd(cmd->index, cmd->dcmd_opcode);
if (megasas_map_dcmd(s, cmd) < 0) {
return MFI_STAT_MEMORY_NOT_AVAILABLE;
}
- while (cmdptr->opcode != -1 && cmdptr->opcode != opcode) {
+ while (cmdptr->opcode != -1 && cmdptr->opcode != cmd->dcmd_opcode) {
cmdptr++;
}
len = cmd->iov_size;
if (cmdptr->opcode == -1) {
- trace_megasas_dcmd_unhandled(cmd->index, opcode, len);
+ trace_megasas_dcmd_unhandled(cmd->index, cmd->dcmd_opcode, len);
retval = megasas_dcmd_dummy(s, cmd);
} else {
trace_megasas_dcmd_enter(cmd->index, cmdptr->desc, len);
@@ -1592,13 +1593,11 @@ static int megasas_handle_dcmd(MegasasState *s, MegasasCmd *cmd)
static int megasas_finish_internal_dcmd(MegasasCmd *cmd,
SCSIRequest *req)
{
- int opcode;
int retval = MFI_STAT_OK;
int lun = req->lun;
- opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
- trace_megasas_dcmd_internal_finish(cmd->index, opcode, lun);
- switch (opcode) {
+ trace_megasas_dcmd_internal_finish(cmd->index, cmd->dcmd_opcode, lun);
+ switch (cmd->dcmd_opcode) {
case MFI_DCMD_PD_GET_INFO:
retval = megasas_pd_get_info_submit(req->dev, lun, cmd);
break;
@@ -1606,7 +1605,7 @@ static int megasas_finish_internal_dcmd(MegasasCmd *cmd,
retval = megasas_ld_get_info_submit(req->dev, lun, cmd);
break;
default:
- trace_megasas_dcmd_internal_invalid(cmd->index, opcode);
+ trace_megasas_dcmd_internal_invalid(cmd->index, cmd->dcmd_opcode);
retval = MFI_STAT_INVALID_DCMD;
break;
}
@@ -1827,7 +1826,6 @@ static void megasas_xfer_complete(SCSIRequest *req, uint32_t len)
{
MegasasCmd *cmd = req->hba_private;
uint8_t *buf;
- uint32_t opcode;
trace_megasas_io_complete(cmd->index, len);
@@ -1837,8 +1835,7 @@ static void megasas_xfer_complete(SCSIRequest *req, uint32_t len)
}
buf = scsi_req_get_buf(req);
- opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
- if (opcode == MFI_DCMD_PD_GET_INFO && cmd->iov_buf) {
+ if (cmd->dcmd_opcode == MFI_DCMD_PD_GET_INFO && cmd->iov_buf) {
struct mfi_pd_info *info = cmd->iov_buf;
if (info->inquiry_data[0] == 0x7f) {
@@ -1849,7 +1846,7 @@ static void megasas_xfer_complete(SCSIRequest *req, uint32_t len)
memcpy(info->vpd_page83, buf, len);
}
scsi_req_continue(req);
- } else if (opcode == MFI_DCMD_LD_GET_INFO) {
+ } else if (cmd->dcmd_opcode == MFI_DCMD_LD_GET_INFO) {
struct mfi_ld_info *info = cmd->iov_buf;
if (cmd->iov_buf) {

218
0009-megasas-do-not-read-command-more-than-once-from-fram.patch Normal file
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@ -0,0 +1,218 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:23:13 +0200
Subject: [PATCH] megasas: do not read command more than once from frame
Avoid TOC-TOU bugs by passing the frame_cmd down, and checking
cmd->dcmd_opcode instead of cmd->frame->header.frame_cmd.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 36c327a69d723571f02a7691631667cdb1865ee1)
---
hw/scsi/megasas.c | 60 +++++++++++++++++++++++--------------------------------
1 file changed, 25 insertions(+), 35 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index a3f75c1650..38e0a2f5ef 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -1591,12 +1591,13 @@ static int megasas_handle_dcmd(MegasasState *s, MegasasCmd *cmd)
}
static int megasas_finish_internal_dcmd(MegasasCmd *cmd,
- SCSIRequest *req)
+ SCSIRequest *req, size_t resid)
{
int retval = MFI_STAT_OK;
int lun = req->lun;
trace_megasas_dcmd_internal_finish(cmd->index, cmd->dcmd_opcode, lun);
+ cmd->iov_size -= resid;
switch (cmd->dcmd_opcode) {
case MFI_DCMD_PD_GET_INFO:
retval = megasas_pd_get_info_submit(req->dev, lun, cmd);
@@ -1649,11 +1650,12 @@ static int megasas_enqueue_req(MegasasCmd *cmd, bool is_write)
}
static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
- bool is_logical)
+ int frame_cmd)
{
uint8_t *cdb;
bool is_write;
struct SCSIDevice *sdev = NULL;
+ bool is_logical = (frame_cmd == MFI_CMD_LD_SCSI_IO);
cdb = cmd->frame->pass.cdb;
@@ -1661,7 +1663,7 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
if (cmd->frame->header.target_id >= MFI_MAX_LD ||
cmd->frame->header.lun_id != 0) {
trace_megasas_scsi_target_not_present(
- mfi_frame_desc[cmd->frame->header.frame_cmd], is_logical,
+ mfi_frame_desc[frame_cmd], is_logical,
cmd->frame->header.target_id, cmd->frame->header.lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
@@ -1671,19 +1673,20 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
cmd->iov_size = le32_to_cpu(cmd->frame->header.data_len);
trace_megasas_handle_scsi(mfi_frame_desc[cmd->frame->header.frame_cmd],
- is_logical, cmd->frame->header.target_id,
+ trace_megasas_handle_scsi(mfi_frame_desc[frame_cmd], is_logical,
+ cmd->frame->header.target_id,
cmd->frame->header.lun_id, sdev, cmd->iov_size);
if (!sdev || (megasas_is_jbod(s) && is_logical)) {
trace_megasas_scsi_target_not_present(
- mfi_frame_desc[cmd->frame->header.frame_cmd], is_logical,
+ mfi_frame_desc[frame_cmd], is_logical,
cmd->frame->header.target_id, cmd->frame->header.lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
if (cmd->frame->header.cdb_len > 16) {
trace_megasas_scsi_invalid_cdb_len(
- mfi_frame_desc[cmd->frame->header.frame_cmd], is_logical,
+ mfi_frame_desc[frame_cmd], is_logical,
cmd->frame->header.target_id, cmd->frame->header.lun_id,
cmd->frame->header.cdb_len);
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
@@ -1703,7 +1706,7 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
cmd->frame->header.lun_id, cdb, cmd);
if (!cmd->req) {
trace_megasas_scsi_req_alloc_failed(
- mfi_frame_desc[cmd->frame->header.frame_cmd],
+ mfi_frame_desc[frame_cmd],
cmd->frame->header.target_id, cmd->frame->header.lun_id);
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
cmd->frame->header.scsi_status = BUSY;
@@ -1725,11 +1728,11 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
return MFI_STAT_INVALID_STATUS;
}
-static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd)
+static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
{
uint32_t lba_count, lba_start_hi, lba_start_lo;
uint64_t lba_start;
- bool is_write = (cmd->frame->header.frame_cmd == MFI_CMD_LD_WRITE);
+ bool is_write = (frame_cmd == MFI_CMD_LD_WRITE);
uint8_t cdb[16];
int len;
struct SCSIDevice *sdev = NULL;
@@ -1746,20 +1749,20 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd)
}
trace_megasas_handle_io(cmd->index,
- mfi_frame_desc[cmd->frame->header.frame_cmd],
+ mfi_frame_desc[frame_cmd],
cmd->frame->header.target_id,
cmd->frame->header.lun_id,
(unsigned long)lba_start, (unsigned long)lba_count);
if (!sdev) {
trace_megasas_io_target_not_present(cmd->index,
- mfi_frame_desc[cmd->frame->header.frame_cmd],
+ mfi_frame_desc[frame_cmd],
cmd->frame->header.target_id, cmd->frame->header.lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
if (cmd->frame->header.cdb_len > 16) {
trace_megasas_scsi_invalid_cdb_len(
- mfi_frame_desc[cmd->frame->header.frame_cmd], 1,
+ mfi_frame_desc[frame_cmd], 1,
cmd->frame->header.target_id, cmd->frame->header.lun_id,
cmd->frame->header.cdb_len);
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
@@ -1781,7 +1784,7 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd)
cmd->frame->header.lun_id, cdb, cmd);
if (!cmd->req) {
trace_megasas_scsi_req_alloc_failed(
- mfi_frame_desc[cmd->frame->header.frame_cmd],
+ mfi_frame_desc[frame_cmd],
cmd->frame->header.target_id, cmd->frame->header.lun_id);
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
cmd->frame->header.scsi_status = BUSY;
@@ -1799,23 +1802,11 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd)
return MFI_STAT_INVALID_STATUS;
}
-static int megasas_finish_internal_command(MegasasCmd *cmd,
- SCSIRequest *req, size_t resid)
-{
- int retval = MFI_STAT_INVALID_CMD;
-
- if (cmd->frame->header.frame_cmd == MFI_CMD_DCMD) {
- cmd->iov_size -= resid;
- retval = megasas_finish_internal_dcmd(cmd, req);
- }
- return retval;
-}
-
static QEMUSGList *megasas_get_sg_list(SCSIRequest *req)
{
MegasasCmd *cmd = req->hba_private;
- if (cmd->frame->header.frame_cmd == MFI_CMD_DCMD) {
+ if (cmd->dcmd_opcode != -1) {
return NULL;
} else {
return &cmd->qsg;
@@ -1829,7 +1820,7 @@ static void megasas_xfer_complete(SCSIRequest *req, uint32_t len)
trace_megasas_io_complete(cmd->index, len);
- if (cmd->frame->header.frame_cmd != MFI_CMD_DCMD) {
+ if (cmd->dcmd_opcode != -1) {
scsi_req_continue(req);
return;
}
@@ -1872,7 +1863,7 @@ static void megasas_command_complete(SCSIRequest *req, uint32_t status,
/*
* Internal command complete
*/
- cmd_status = megasas_finish_internal_command(cmd, req, resid);
+ cmd_status = megasas_finish_internal_dcmd(cmd, req, resid);
if (cmd_status == MFI_STAT_INVALID_STATUS) {
return;
}
@@ -1943,6 +1934,7 @@ static void megasas_handle_frame(MegasasState *s, uint64_t frame_addr,
{
uint8_t frame_status = MFI_STAT_INVALID_CMD;
uint64_t frame_context;
+ int frame_cmd;
MegasasCmd *cmd;
/*
@@ -1961,7 +1953,8 @@ static void megasas_handle_frame(MegasasState *s, uint64_t frame_addr,
s->event_count++;
return;
}
- switch (cmd->frame->header.frame_cmd) {
+ frame_cmd = cmd->frame->header.frame_cmd;
+ switch (frame_cmd) {
case MFI_CMD_INIT:
frame_status = megasas_init_firmware(s, cmd);
break;
@@ -1972,18 +1965,15 @@ static void megasas_handle_frame(MegasasState *s, uint64_t frame_addr,
frame_status = megasas_handle_abort(s, cmd);
break;
case MFI_CMD_PD_SCSI_IO:
- frame_status = megasas_handle_scsi(s, cmd, 0);
- break;
case MFI_CMD_LD_SCSI_IO:
- frame_status = megasas_handle_scsi(s, cmd, 1);
+ frame_status = megasas_handle_scsi(s, cmd, frame_cmd);
break;
case MFI_CMD_LD_READ:
case MFI_CMD_LD_WRITE:
- frame_status = megasas_handle_io(s, cmd);
+ frame_status = megasas_handle_io(s, cmd, frame_cmd);
break;
default:
- trace_megasas_unhandled_frame_cmd(cmd->index,
- cmd->frame->header.frame_cmd);
+ trace_megasas_unhandled_frame_cmd(cmd->index, frame_cmd);
s->event_count++;
break;
}

145
0010-megasas-do-not-read-SCSI-req-parameters-more-than-on.patch Normal file
View File

@ -0,0 +1,145 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:25:03 +0200
Subject: [PATCH] megasas: do not read SCSI req parameters more than once from
frame
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit b356807fcdfc45583c437f761fc579ab2a8eab11)
---
hw/scsi/megasas.c | 60 ++++++++++++++++++++++++-------------------------------
1 file changed, 26 insertions(+), 34 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 38e0a2f5ef..135662df31 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -1653,42 +1653,39 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
int frame_cmd)
{
uint8_t *cdb;
+ int target_id, lun_id, cdb_len;
bool is_write;
struct SCSIDevice *sdev = NULL;
bool is_logical = (frame_cmd == MFI_CMD_LD_SCSI_IO);
cdb = cmd->frame->pass.cdb;
+ target_id = cmd->frame->header.target_id;
+ lun_id = cmd->frame->header.lun_id;
+ cdb_len = cmd->frame->header.cdb_len;
if (is_logical) {
- if (cmd->frame->header.target_id >= MFI_MAX_LD ||
- cmd->frame->header.lun_id != 0) {
+ if (target_id >= MFI_MAX_LD || lun_id != 0) {
trace_megasas_scsi_target_not_present(
- mfi_frame_desc[frame_cmd], is_logical,
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
+ mfi_frame_desc[frame_cmd], is_logical, target_id, lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
}
- sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
- cmd->frame->header.lun_id);
+ sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
cmd->iov_size = le32_to_cpu(cmd->frame->header.data_len);
- trace_megasas_handle_scsi(mfi_frame_desc[cmd->frame->header.frame_cmd],
trace_megasas_handle_scsi(mfi_frame_desc[frame_cmd], is_logical,
- cmd->frame->header.target_id,
- cmd->frame->header.lun_id, sdev, cmd->iov_size);
+ target_id, lun_id, sdev, cmd->iov_size);
if (!sdev || (megasas_is_jbod(s) && is_logical)) {
trace_megasas_scsi_target_not_present(
- mfi_frame_desc[frame_cmd], is_logical,
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
+ mfi_frame_desc[frame_cmd], is_logical, target_id, lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
- if (cmd->frame->header.cdb_len > 16) {
+ if (cdb_len > 16) {
trace_megasas_scsi_invalid_cdb_len(
mfi_frame_desc[frame_cmd], is_logical,
- cmd->frame->header.target_id, cmd->frame->header.lun_id,
- cmd->frame->header.cdb_len);
+ target_id, lun_id, cdb_len);
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
cmd->frame->header.scsi_status = CHECK_CONDITION;
s->event_count++;
@@ -1702,12 +1699,10 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
return MFI_STAT_SCSI_DONE_WITH_ERROR;
}
- cmd->req = scsi_req_new(sdev, cmd->index,
- cmd->frame->header.lun_id, cdb, cmd);
+ cmd->req = scsi_req_new(sdev, cmd->index, lun_id, cdb, cmd);
if (!cmd->req) {
trace_megasas_scsi_req_alloc_failed(
- mfi_frame_desc[frame_cmd],
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
cmd->frame->header.scsi_status = BUSY;
s->event_count++;
@@ -1736,35 +1731,33 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
uint8_t cdb[16];
int len;
struct SCSIDevice *sdev = NULL;
+ int target_id, lun_id, cdb_len;
lba_count = le32_to_cpu(cmd->frame->io.header.data_len);
lba_start_lo = le32_to_cpu(cmd->frame->io.lba_lo);
lba_start_hi = le32_to_cpu(cmd->frame->io.lba_hi);
lba_start = ((uint64_t)lba_start_hi << 32) | lba_start_lo;
- if (cmd->frame->header.target_id < MFI_MAX_LD &&
- cmd->frame->header.lun_id == 0) {
- sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
- cmd->frame->header.lun_id);
+ target_id = cmd->frame->header.target_id;
+ lun_id = cmd->frame->header.lun_id;
+ cdb_len = cmd->frame->header.cdb_len;
+
+ if (target_id < MFI_MAX_LD && lun_id == 0) {
+ sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
}
trace_megasas_handle_io(cmd->index,
- mfi_frame_desc[frame_cmd],
- cmd->frame->header.target_id,
- cmd->frame->header.lun_id,
+ mfi_frame_desc[frame_cmd], target_id, lun_id,
(unsigned long)lba_start, (unsigned long)lba_count);
if (!sdev) {
trace_megasas_io_target_not_present(cmd->index,
- mfi_frame_desc[frame_cmd],
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
return MFI_STAT_DEVICE_NOT_FOUND;
}
- if (cmd->frame->header.cdb_len > 16) {
+ if (cdb_len > 16) {
trace_megasas_scsi_invalid_cdb_len(
- mfi_frame_desc[frame_cmd], 1,
- cmd->frame->header.target_id, cmd->frame->header.lun_id,
- cmd->frame->header.cdb_len);
+ mfi_frame_desc[frame_cmd], 1, target_id, lun_id, cdb_len);
megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
cmd->frame->header.scsi_status = CHECK_CONDITION;
s->event_count++;
@@ -1781,11 +1774,10 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
megasas_encode_lba(cdb, lba_start, lba_count, is_write);
cmd->req = scsi_req_new(sdev, cmd->index,
- cmd->frame->header.lun_id, cdb, cmd);
+ lun_id, cdb, cmd);
if (!cmd->req) {
trace_megasas_scsi_req_alloc_failed(
- mfi_frame_desc[frame_cmd],
- cmd->frame->header.target_id, cmd->frame->header.lun_id);
+ mfi_frame_desc[frame_cmd], target_id, lun_id);
megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
cmd->frame->header.scsi_status = BUSY;
s->event_count++;

122
0011-megasas-always-store-SCSIRequest-into-MegasasCmd.patch Normal file
View File

@ -0,0 +1,122 @@
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 1 Jun 2017 17:26:14 +0200
Subject: [PATCH] megasas: always store SCSIRequest* into MegasasCmd
This ensures that the request is unref'ed properly, and avoids a
segmentation fault in the new qtest testcase that is added.
This is CVE-2017-9503.
Reported-by: Zhangyanyu <zyy4013@stu.ouc.edu.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 87e459a810d7b1ec1638085b5a80ea3d9b43119a)
---
hw/scsi/megasas.c | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 135662df31..734fdaef90 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -609,6 +609,9 @@ static void megasas_reset_frames(MegasasState *s)
static void megasas_abort_command(MegasasCmd *cmd)
{
/* Never abort internal commands. */
+ if (cmd->dcmd_opcode != -1) {
+ return;
+ }
if (cmd->req != NULL) {
scsi_req_cancel(cmd->req);
}
@@ -1017,7 +1020,6 @@ static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun,
uint64_t pd_size;
uint16_t pd_id = ((sdev->id & 0xFF) << 8) | (lun & 0xFF);
uint8_t cmdbuf[6];
- SCSIRequest *req;
size_t len, resid;
if (!cmd->iov_buf) {
@@ -1026,8 +1028,8 @@ static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun,
info->inquiry_data[0] = 0x7f; /* Force PQual 0x3, PType 0x1f */
info->vpd_page83[0] = 0x7f;
megasas_setup_inquiry(cmdbuf, 0, sizeof(info->inquiry_data));
- req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
- if (!req) {
+ cmd->req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
+ if (!cmd->req) {
trace_megasas_dcmd_req_alloc_failed(cmd->index,
"PD get info std inquiry");
g_free(cmd->iov_buf);
@@ -1036,26 +1038,26 @@ static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun,
}
trace_megasas_dcmd_internal_submit(cmd->index,
"PD get info std inquiry", lun);
- len = scsi_req_enqueue(req);
+ len = scsi_req_enqueue(cmd->req);
if (len > 0) {
cmd->iov_size = len;
- scsi_req_continue(req);
+ scsi_req_continue(cmd->req);
}
return MFI_STAT_INVALID_STATUS;
} else if (info->inquiry_data[0] != 0x7f && info->vpd_page83[0] == 0x7f) {
megasas_setup_inquiry(cmdbuf, 0x83, sizeof(info->vpd_page83));
- req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
- if (!req) {
+ cmd->req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
+ if (!cmd->req) {
trace_megasas_dcmd_req_alloc_failed(cmd->index,
"PD get info vpd inquiry");
return MFI_STAT_FLASH_ALLOC_FAIL;
}
trace_megasas_dcmd_internal_submit(cmd->index,
"PD get info vpd inquiry", lun);
- len = scsi_req_enqueue(req);
+ len = scsi_req_enqueue(cmd->req);
if (len > 0) {
cmd->iov_size = len;
- scsi_req_continue(req);
+ scsi_req_continue(cmd->req);
}
return MFI_STAT_INVALID_STATUS;
}
@@ -1217,7 +1219,6 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun,
struct mfi_ld_info *info = cmd->iov_buf;
size_t dcmd_size = sizeof(struct mfi_ld_info);
uint8_t cdb[6];
- SCSIRequest *req;
ssize_t len, resid;
uint16_t sdev_id = ((sdev->id & 0xFF) << 8) | (lun & 0xFF);
uint64_t ld_size;
@@ -1226,8 +1227,8 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun,
cmd->iov_buf = g_malloc0(dcmd_size);
info = cmd->iov_buf;
megasas_setup_inquiry(cdb, 0x83, sizeof(info->vpd_page83));
- req = scsi_req_new(sdev, cmd->index, lun, cdb, cmd);
- if (!req) {
+ cmd->req = scsi_req_new(sdev, cmd->index, lun, cdb, cmd);
+ if (!cmd->req) {
trace_megasas_dcmd_req_alloc_failed(cmd->index,
"LD get info vpd inquiry");
g_free(cmd->iov_buf);
@@ -1236,10 +1237,10 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun,
}
trace_megasas_dcmd_internal_submit(cmd->index,
"LD get info vpd inquiry", lun);
- len = scsi_req_enqueue(req);
+ len = scsi_req_enqueue(cmd->req);
if (len > 0) {
cmd->iov_size = len;
- scsi_req_continue(req);
+ scsi_req_continue(cmd->req);
}
return MFI_STAT_INVALID_STATUS;
}
@@ -1851,7 +1852,7 @@ static void megasas_command_complete(SCSIRequest *req, uint32_t status,
return;
}
- if (cmd->req == NULL) {
+ if (cmd->dcmd_opcode != -1) {
/*
* Internal command complete
*/

47
0101-usb-redir-fix-stack-overflow-in-usbredir_log_data.patch Normal file
View File

@ -0,0 +1,47 @@
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 9 May 2017 13:01:28 +0200
Subject: [PATCH] usb-redir: fix stack overflow in usbredir_log_data
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Don't reinvent a broken wheel, just use the hexdump function we have.
Impact: low, broken code doesn't run unless you have debug logging
enabled.
Reported-by: 李强 <liqiang6-s@360.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170509110128.27261-1-kraxel@redhat.com
(cherry picked from commit bd4a683505b27adc1ac809f71e918e58573d851d)
---
hw/usb/redirect.c | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index 0efe62f725..eb70dc7218 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -229,21 +229,10 @@ static void usbredir_log(void *priv, int level, const char *msg)
static void usbredir_log_data(USBRedirDevice *dev, const char *desc,
const uint8_t *data, int len)
{
- int i, j, n;
-
if (dev->debug < usbredirparser_debug_data) {
return;
}
-
- for (i = 0; i < len; i += j) {
- char buf[128];
-
- n = sprintf(buf, "%s", desc);
- for (j = 0; j < 8 && i + j < len; j++) {
- n += sprintf(buf + n, " %02X", data[i + j]);
- }
- error_report("%s", buf);
- }
+ qemu_hexdump((char *)data, stderr, desc, len);
}
/*

77
0102-nbd-Fully-initialize-client-in-case-of-failed-negoti.patch Normal file
View File

@ -0,0 +1,77 @@
From: Eric Blake <eblake@redhat.com>
Date: Fri, 26 May 2017 22:04:21 -0500
Subject: [PATCH] nbd: Fully initialize client in case of failed negotiation
If a non-NBD client connects to qemu-nbd, we would end up with
a SIGSEGV in nbd_client_put() because we were trying to
unregister the client's association to the export, even though
we skipped inserting the client into that list. Easy trigger
in two terminals:
$ qemu-nbd -p 30001 --format=raw file
$ nmap 127.0.0.1 -p 30001
nmap claims that it thinks it connected to a pago-services1
server (which probably means nmap could be updated to learn the
NBD protocol and give a more accurate diagnosis of the open
port - but that's not our problem), then terminates immediately,
so our call to nbd_negotiate() fails. The fix is to reorder
nbd_co_client_start() to ensure that all initialization occurs
before we ever try talking to a client in nbd_negotiate(), so
that the teardown sequence on negotiation failure doesn't fault
while dereferencing a half-initialized object.
While debugging this, I also noticed that nbd_update_server_watch()
called by nbd_client_closed() was still adding a channel to accept
the next client, even when the state was no longer RUNNING. That
is fixed by making nbd_can_accept() pay attention to the current
state.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1451614
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170527030421.28366-1-eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit df8ad9f128c15aa0a0ebc7b24e9a22c9775b67af)
---
nbd/server.c | 8 +++-----
qemu-nbd.c | 2 +-
2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index 924a1fe2db..edfda84d43 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1376,16 +1376,14 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
if (exp) {
nbd_export_get(exp);
+ QTAILQ_INSERT_TAIL(&exp->clients, client, next);
}
+ qemu_co_mutex_init(&client->send_lock);
+
if (nbd_negotiate(data)) {
client_close(client);
goto out;
}
- qemu_co_mutex_init(&client->send_lock);
-
- if (exp) {
- QTAILQ_INSERT_TAIL(&exp->clients, client, next);
- }
nbd_client_receive_next_request(client);
diff --git a/qemu-nbd.c b/qemu-nbd.c
index e080fb7c75..b44764eb87 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -324,7 +324,7 @@ out:
static int nbd_can_accept(void)
{
- return nb_fds < shared;
+ return state == RUNNING && nb_fds < shared;
}
static void nbd_export_closed(NBDExport *exp)

194
0103-nbd-Fix-regression-on-resiliency-to-port-scan.patch Normal file
View File

@ -0,0 +1,194 @@
From: Eric Blake <eblake@redhat.com>
Date: Thu, 8 Jun 2017 17:26:17 -0500
Subject: [PATCH] nbd: Fix regression on resiliency to port scan
Back in qemu 2.5, qemu-nbd was immune to port probes (a transient
server would not quit, regardless of how many probe connections
came and went, until a connection actually negotiated). But we
broke that in commit ee7d7aa when removing the return value to
nbd_client_new(), although that patch also introduced a bug causing
an assertion failure on a client that fails negotiation. We then
made it worse during refactoring in commit 1a6245a (a segfault
before we could even assert); the (masked) assertion was cleaned
up in d3780c2 (still in 2.6), and just recently we finally fixed
the segfault ("nbd: Fully intialize client in case of failed
negotiation"). But that still means that ever since we added
TLS support to qemu-nbd, we have been vulnerable to an ill-timed
port-scan being able to cause a denial of service by taking down
qemu-nbd before a real client has a chance to connect.
Since negotiation is now handled asynchronously via coroutines,
we no longer have a synchronous point of return by re-adding a
return value to nbd_client_new(). So this patch instead wires
things up to pass the negotiation status through the close_fn
callback function.
Simple test across two terminals:
$ qemu-nbd -f raw -p 30001 file
$ nmap 127.0.0.1 -p 30001 && \
qemu-io -c 'r 0 512' -f raw nbd://localhost:30001
Note that this patch does not change what constitutes successful
negotiation (thus, a client must enter transmission phase before
that client can be considered as a reason to terminate the server
when the connection ends). Perhaps we may want to tweak things
in a later patch to also treat a client that uses NBD_OPT_ABORT
as being a 'successful' negotiation (the client correctly talked
the NBD protocol, and informed us it was not going to use our
export after all), but that's a discussion for another day.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1451614
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170608222617.20376-1-eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 0c9390d978cbf61e8f16c9f580fa96b305c43568)
---
blockdev-nbd.c | 6 +++++-
include/block/nbd.h | 2 +-
nbd/server.c | 24 +++++++++++++++---------
qemu-nbd.c | 4 ++--
4 files changed, 23 insertions(+), 13 deletions(-)
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 8a11807df3..8d7284ac56 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -27,6 +27,10 @@ typedef struct NBDServerData {
static NBDServerData *nbd_server;
+static void nbd_blockdev_client_closed(NBDClient *client, bool ignored)
+{
+ nbd_client_put(client);
+}
static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
gpointer opaque)
@@ -46,7 +50,7 @@ static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
qio_channel_set_name(QIO_CHANNEL(cioc), "nbd-server");
nbd_client_new(NULL, cioc,
nbd_server->tlscreds, NULL,
- nbd_client_put);
+ nbd_blockdev_client_closed);
object_unref(OBJECT(cioc));
return TRUE;
}
diff --git a/include/block/nbd.h b/include/block/nbd.h
index 3e373f0498..b69c30d063 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -160,7 +160,7 @@ void nbd_client_new(NBDExport *exp,
QIOChannelSocket *sioc,
QCryptoTLSCreds *tlscreds,
const char *tlsaclname,
- void (*close)(NBDClient *));
+ void (*close_fn)(NBDClient *, bool));
void nbd_client_get(NBDClient *client);
void nbd_client_put(NBDClient *client);
diff --git a/nbd/server.c b/nbd/server.c
index edfda84d43..a98bb21a0a 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -81,7 +81,7 @@ static QTAILQ_HEAD(, NBDExport) exports = QTAILQ_HEAD_INITIALIZER(exports);
struct NBDClient {
int refcount;
- void (*close)(NBDClient *client);
+ void (*close_fn)(NBDClient *client, bool negotiated);
bool no_zeroes;
NBDExport *exp;
@@ -796,7 +796,7 @@ void nbd_client_put(NBDClient *client)
}
}
-static void client_close(NBDClient *client)
+static void client_close(NBDClient *client, bool negotiated)
{
if (client->closing) {
return;
@@ -811,8 +811,8 @@ static void client_close(NBDClient *client)
NULL);
/* Also tell the client, so that they release their reference. */
- if (client->close) {
- client->close(client);
+ if (client->close_fn) {
+ client->close_fn(client, negotiated);
}
}
@@ -993,7 +993,7 @@ void nbd_export_close(NBDExport *exp)
nbd_export_get(exp);
QTAILQ_FOREACH_SAFE(client, &exp->clients, next, next) {
- client_close(client);
+ client_close(client, true);
}
nbd_export_set_name(exp, NULL);
nbd_export_set_description(exp, NULL);
@@ -1355,7 +1355,7 @@ done:
out:
nbd_request_put(req);
- client_close(client);
+ client_close(client, true);
nbd_client_put(client);
}
@@ -1381,7 +1381,7 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
qemu_co_mutex_init(&client->send_lock);
if (nbd_negotiate(data)) {
- client_close(client);
+ client_close(client, false);
goto out;
}
@@ -1391,11 +1391,17 @@ out:
g_free(data);
}
+/*
+ * Create a new client listener on the given export @exp, using the
+ * given channel @sioc. Begin servicing it in a coroutine. When the
+ * connection closes, call @close_fn with an indication of whether the
+ * client completed negotiation.
+ */
void nbd_client_new(NBDExport *exp,
QIOChannelSocket *sioc,
QCryptoTLSCreds *tlscreds,
const char *tlsaclname,
- void (*close_fn)(NBDClient *))
+ void (*close_fn)(NBDClient *, bool))
{
NBDClient *client;
NBDClientNewData *data = g_new(NBDClientNewData, 1);
@@ -1412,7 +1418,7 @@ void nbd_client_new(NBDExport *exp,
object_ref(OBJECT(client->sioc));
client->ioc = QIO_CHANNEL(sioc);
object_ref(OBJECT(client->ioc));
- client->close = close_fn;
+ client->close_fn = close_fn;
data->client = client;
data->co = qemu_coroutine_create(nbd_co_client_start, data);
diff --git a/qemu-nbd.c b/qemu-nbd.c
index b44764eb87..483dd77a77 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -335,10 +335,10 @@ static void nbd_export_closed(NBDExport *exp)
static void nbd_update_server_watch(void);
-static void nbd_client_closed(NBDClient *client)
+static void nbd_client_closed(NBDClient *client, bool negotiated)
{
nb_fds--;
- if (nb_fds == 0 && !persistent && state == RUNNING) {
+ if (negotiated && nb_fds == 0 && !persistent && state == RUNNING) {
state = TERMINATE;
}
nbd_update_server_watch();

44
0104-qemu-nbd-Ignore-SIGPIPE.patch Normal file
View File

@ -0,0 +1,44 @@
From: Max Reitz <mreitz@redhat.com>
Date: Sun, 11 Jun 2017 14:37:14 +0200
Subject: [PATCH] qemu-nbd: Ignore SIGPIPE
qemu proper has done so for 13 years
(8a7ddc38a60648257dc0645ab4a05b33d6040063), qemu-img and qemu-io have
done so for four years (526eda14a68d5b3596be715505289b541288ef2a).
Ignoring this signal is especially important in qemu-nbd because
otherwise a client can easily take down the qemu-nbd server by dropping
the connection when the server wants to send something, for example:
$ qemu-nbd -x foo -f raw -t null-co:// &
[1] 12726
$ qemu-io -c quit nbd://localhost/bar
can't open device nbd://localhost/bar: No export with name 'bar' available
[1] + 12726 broken pipe qemu-nbd -x foo -f raw -t null-co://
In this case, the client sends an NBD_OPT_ABORT and closes the
connection (because it is not required to wait for a reply), but the
server replies with an NBD_REP_ACK (because it is required to reply).
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20170611123714.31292-1-mreitz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 041e32b8d9d076980b4e35317c0339e57ab888f1)
---
qemu-nbd.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/qemu-nbd.c b/qemu-nbd.c
index 483dd77a77..5deb37e03e 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -581,6 +581,10 @@ int main(int argc, char **argv)
sa_sigterm.sa_handler = termsig_handler;
sigaction(SIGTERM, &sa_sigterm, NULL);
+#ifdef CONFIG_POSIX
+ signal(SIGPIPE, SIG_IGN);
+#endif
+
module_call_init(MODULE_INIT_TRACE);
qcrypto_init(&error_fatal);

21
qemu-2.9.0-libvirt32.patch
View File

@ -1,21 +0,0 @@
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Index: qemu-2.9.0/monitor.c
===================================================================
--- qemu-2.9.0.orig/monitor.c
+++ qemu-2.9.0/monitor.c
@@ -983,10 +983,12 @@ static void qmp_unregister_commands_hack
#ifndef TARGET_ARM
qmp_unregister_command(&qmp_commands, "query-gic-capabilities");
#endif
-#if !defined(TARGET_S390X) && !defined(TARGET_I386)
+#if 1 || !defined(TARGET_S390X) && !defined(TARGET_I386)
+ /*XXX emergency workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1467599 */
qmp_unregister_command(&qmp_commands, "query-cpu-model-expansion");
#endif
-#if !defined(TARGET_S390X)
+#if 1 || !defined(TARGET_S390X)
+ /*XXX emergency workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1467599 */
qmp_unregister_command(&qmp_commands, "query-cpu-model-baseline");
qmp_unregister_command(&qmp_commands, "query-cpu-model-comparison");
#endif

53
qemu.spec
View File

@ -92,7 +92,7 @@ Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
Summary: QEMU is a FAST! processor emulator
Name: qemu
Version: 2.9.0
Release: 1%{?rcrel}%{?dist}.1
Release: 2%{?rcrel}%{?dist}
Epoch: 2
License: GPLv2+ and LGPLv2+ and BSD
Group: Development/Tools
@ -126,11 +126,36 @@ Source21: 50-kvm-s390x.conf
# /etc/security/limits.d/95-kvm-ppc64-memlock.conf
Source22: 95-kvm-ppc64-memlock.conf
# https://bugzilla.redhat.com/show_bug.cgi?id=1467599#c24
# workaround an issue between qemu 2.9 and libvirt 3.2 by disabling
# some qmp commands to force libvirt back on its old code
# from ehabkost
Patch0: qemu-2.9.0-libvirt32.patch
# CVE-2017-8112: vmw_pvscsi: infinite loop in pvscsi_log2 (bz #1445622)
Patch0001: 0001-vmw_pvscsi-check-message-ring-page-count-at-initiali.patch
# CVE-2017-8309: audio: host memory lekage via capture buffer (bz #1446520)
Patch0002: 0002-audio-release-capture-buffers.patch
# CVE-2017-8379: input: host memory lekage via keyboard events (bz #1446560)
Patch0003: 0003-input-limit-kbd-queue-depth.patch
# CVE-2017-8380: scsi: megasas: out-of-bounds read in megasas_mmio_write (bz
# #1446578)
Patch0004: 0004-scsi-avoid-an-off-by-one-error-in-megasas_mmio_write.patch
# CVE-2017-7493: 9pfs: guest privilege escalation in virtfs mapped-file mode
# (bz #1451711)
Patch0005: 0005-9pfs-local-forbid-client-access-to-metadata-CVE-2017.patch
# CVE-2017-9503: megasas: null pointer dereference while processing megasas
# command (bz #1459478)
Patch0006: 0006-megasas-do-not-read-sense-length-more-than-once-from.patch
Patch0007: 0007-megasas-do-not-read-iovec-count-more-than-once-from-.patch
Patch0008: 0008-megasas-do-not-read-DCMD-opcode-more-than-once-from-.patch
Patch0009: 0009-megasas-do-not-read-command-more-than-once-from-fram.patch
Patch0010: 0010-megasas-do-not-read-SCSI-req-parameters-more-than-on.patch
Patch0011: 0011-megasas-always-store-SCSIRequest-into-MegasasCmd.patch
# CVE-2017-10806: usb-redirect: stack buffer overflow in debug logging (bz
# #1468497)
Patch0101: 0101-usb-redir-fix-stack-overflow-in-usbredir_log_data.patch
# CVE-2017-9524: nbd: segfault due to client non-negotiation (bz #1460172)
Patch0102: 0102-nbd-Fully-initialize-client-in-case-of-failed-negoti.patch
Patch0103: 0103-nbd-Fix-regression-on-resiliency-to-port-scan.patch
# CVE-2017-10664: qemu-nbd: server breaks with SIGPIPE upon client abort (bz
# #1466192)
Patch0104: 0104-qemu-nbd-Ignore-SIGPIPE.patch
# documentation deps
BuildRequires: texinfo
@ -2005,6 +2030,22 @@ getent passwd qemu >/dev/null || \
%changelog
* Wed Jul 12 2017 Cole Robinson <crobinso@redhat.com> - 2:2.9.0-2
- CVE-2017-8112: vmw_pvscsi: infinite loop in pvscsi_log2 (bz #1445622)
- CVE-2017-8309: audio: host memory lekage via capture buffer (bz #1446520)
- CVE-2017-8379: input: host memory lekage via keyboard events (bz #1446560)
- CVE-2017-8380: scsi: megasas: out-of-bounds read in megasas_mmio_write (bz
#1446578)
- CVE-2017-7493: 9pfs: guest privilege escalation in virtfs mapped-file mode
(bz #1451711)
- CVE-2017-9503: megasas: null pointer dereference while processing megasas
command (bz #1459478)
- CVE-2017-10806: usb-redirect: stack buffer overflow in debug logging (bz
#1468497)
- CVE-2017-9524: nbd: segfault due to client non-negotiation (bz #1460172)
- CVE-2017-10664: qemu-nbd: server breaks with SIGPIPE upon client abort (bz
#1466192)
* Tue Jul 04 2017 Adam Williamson <awilliam@redhat.com> - 2:2.9.0-1.fc26.1
- Disable some qmp commands to work around an issue with libvirt 3.2