cherry-pick segfault fix
this was reported multiple times in our forums[1 with backtraces, 2 & 3 with same log messages], fix is taken from upstream master. 1: https://forum.proxmox.com/threads/pve-7-0-14-1-vm-not-running-live-migration-kills-vm-post-ssd-move-pre-ram-move.99704/ 2: https://forum.proxmox.com/threads/proxmox-7-0-14-1-crashes-vm-during-migrate-to-other-host.99678 3: https://forum.proxmox.com/threads/cannot-migrate-between-zfs-and-ceph.99685/#post-430152 Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>master
Fabian Grünbichler
Thomas Lamprecht
parent
cc707c362e
commit
edbcc10a69
85
debian/patches/extra/0007-block-mirror-fix-NULL-pointer-dereference-in-mirror_.patch
vendored
Normal file
85
debian/patches/extra/0007-block-mirror-fix-NULL-pointer-dereference-in-mirror_.patch
vendored
Normal file
|
|
@ -0,0 +1,85 @@
|
|||
From 14889c02315b196f28b02832362dead64b015b6e Mon Sep 17 00:00:00 2001
|
||||
From: Stefano Garzarella <sgarzare@redhat.com>
|
||||
Date: Fri, 10 Sep 2021 14:45:33 +0200
|
||||
Subject: [PATCH qemu] block/mirror: fix NULL pointer dereference in
|
||||
mirror_wait_on_conflicts()
|
||||
MIME-Version: 1.0
|
||||
Content-Type: text/plain; charset=UTF-8
|
||||
Content-Transfer-Encoding: 8bit
|
||||
|
||||
In mirror_iteration() we call mirror_wait_on_conflicts() with
|
||||
`self` parameter set to NULL.
|
||||
|
||||
Starting from commit d44dae1a7c we dereference `self` pointer in
|
||||
mirror_wait_on_conflicts() without checks if it is not NULL.
|
||||
|
||||
Backtrace:
|
||||
Program terminated with signal SIGSEGV, Segmentation fault.
|
||||
#0 mirror_wait_on_conflicts (self=0x0, s=<optimized out>, offset=<optimized out>, bytes=<optimized out>)
|
||||
at ../block/mirror.c:172
|
||||
172 self->waiting_for_op = op;
|
||||
[Current thread is 1 (Thread 0x7f0908931ec0 (LWP 380249))]
|
||||
(gdb) bt
|
||||
#0 mirror_wait_on_conflicts (self=0x0, s=<optimized out>, offset=<optimized out>, bytes=<optimized out>)
|
||||
at ../block/mirror.c:172
|
||||
#1 0x00005610c5d9d631 in mirror_run (job=0x5610c76a2c00, errp=<optimized out>) at ../block/mirror.c:491
|
||||
#2 0x00005610c5d58726 in job_co_entry (opaque=0x5610c76a2c00) at ../job.c:917
|
||||
#3 0x00005610c5f046c6 in coroutine_trampoline (i0=<optimized out>, i1=<optimized out>)
|
||||
at ../util/coroutine-ucontext.c:173
|
||||
#4 0x00007f0909975820 in ?? () at ../sysdeps/unix/sysv/linux/x86_64/__start_context.S:91
|
||||
from /usr/lib64/libc.so.6
|
||||
|
||||
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2001404
|
||||
Fixes: d44dae1a7c ("block/mirror: fix active mirror dead-lock in mirror_wait_on_conflicts")
|
||||
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
|
||||
Message-Id: <20210910124533.288318-1-sgarzare@redhat.com>
|
||||
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
|
||||
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
|
||||
(cherry picked from commit 66fed30c9cd11854fc878a4eceb507e915d7c9cd)
|
||||
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
|
||||
---
|
||||
block/mirror.c | 25 ++++++++++++++++---------
|
||||
1 file changed, 16 insertions(+), 9 deletions(-)
|
||||
|
||||
diff --git a/block/mirror.c b/block/mirror.c
|
||||
index 33477ade1b..6a126d18c8 100644
|
||||
--- a/block/mirror.c
|
||||
+++ b/block/mirror.c
|
||||
@@ -162,18 +162,25 @@ static void coroutine_fn mirror_wait_on_conflicts(MirrorOp *self,
|
||||
if (ranges_overlap(self_start_chunk, self_nb_chunks,
|
||||
op_start_chunk, op_nb_chunks))
|
||||
{
|
||||
- /*
|
||||
- * If the operation is already (indirectly) waiting for us, or
|
||||
- * will wait for us as soon as it wakes up, then just go on
|
||||
- * (instead of producing a deadlock in the former case).
|
||||
- */
|
||||
- if (op->waiting_for_op) {
|
||||
- continue;
|
||||
+ if (self) {
|
||||
+ /*
|
||||
+ * If the operation is already (indirectly) waiting for us,
|
||||
+ * or will wait for us as soon as it wakes up, then just go
|
||||
+ * on (instead of producing a deadlock in the former case).
|
||||
+ */
|
||||
+ if (op->waiting_for_op) {
|
||||
+ continue;
|
||||
+ }
|
||||
+
|
||||
+ self->waiting_for_op = op;
|
||||
}
|
||||
|
||||
- self->waiting_for_op = op;
|
||||
qemu_co_queue_wait(&op->waiting_requests, NULL);
|
||||
- self->waiting_for_op = NULL;
|
||||
+
|
||||
+ if (self) {
|
||||
+ self->waiting_for_op = NULL;
|
||||
+ }
|
||||
+
|
||||
break;
|
||||
}
|
||||
}
|
||||
--
|
||||
2.30.2
|
||||
|
||||
|
|
@ -4,6 +4,7 @@ extra/0003-monitor-hmp-add-support-for-flag-argument-with-value.patch
|
|||
extra/0004-monitor-refactor-set-expire_password-and-allow-VNC-d.patch
|
||||
extra/0005-monitor-hmp-correctly-invert-password-argument-detec.patch
|
||||
extra/0006-qxl-fix-pre-save-logic.patch
|
||||
extra/0007-block-mirror-fix-NULL-pointer-dereference-in-mirror_.patch
|
||||
bitmap-mirror/0001-drive-mirror-add-support-for-sync-bitmap-mode-never.patch
|
||||
bitmap-mirror/0002-drive-mirror-add-support-for-conditional-and-always-.patch
|
||||
bitmap-mirror/0003-mirror-add-check-for-bitmap-mode-without-bitmap.patch
|
||||
|
|
|
|||
Loading…
Reference in New Issue