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| author | Stefan Hajnoczi | 2014-07-09 10:05:46 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2014-07-14 12:03:20 +0200 |
| commit | 0a21ea3289c5a3b982386e3eaaa37627c18f5e35 (patch) | |
| tree | 09bfbc525353dea9f84b9ef1fc7cf60edc683c55 /hw/block | |
| parent | block: Assert qiov length matches request length (diff) | |
| download | qemu-0a21ea3289c5a3b982386e3eaaa37627c18f5e35.tar.gz qemu-0a21ea3289c5a3b982386e3eaaa37627c18f5e35.tar.xz qemu-0a21ea3289c5a3b982386e3eaaa37627c18f5e35.zip | |
virtio-blk: avoid dataplane VirtIOBlockReq early free
VirtIOBlockReq is freed later by virtio_blk_free_request() in
hw/block/virtio-blk.c. Remove this extraneous g_slice_free().
This patch fixes the following segfault:
0x00005555556373af in virtio_blk_rw_complete (opaque=0x5555565ff5e0, ret=0) at hw/block/virtio-blk.c:99
99 bdrv_acct_done(req->dev->bs, &req->acct);
(gdb) print req
$1 = (VirtIOBlockReq *) 0x5555565ff5e0
(gdb) print req->dev
$2 = (VirtIOBlock *) 0x0
(gdb) bt
#0 0x00005555556373af in virtio_blk_rw_complete (opaque=0x5555565ff5e0, ret=0) at hw/block/virtio-blk.c:99
#1 0x0000555555840ebe in bdrv_co_em_bh (opaque=0x5555566152d0) at block.c:4675
#2 0x000055555583de77 in aio_bh_poll (ctx=ctx@entry=0x5555563a8150) at async.c:81
#3 0x000055555584b7a7 in aio_poll (ctx=0x5555563a8150, blocking=blocking@entry=true) at aio-posix.c:188
#4 0x00005555556e520e in iothread_run (opaque=0x5555563a7fd8) at iothread.c:41
#5 0x00007ffff42ba124 in start_thread () from /usr/lib/libpthread.so.0
#6 0x00007ffff16d14bd in clone () from /usr/lib/libc.so.6
Reported-by: Max Reitz <mreitz@redhat.com>
Cc: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/dataplane/virtio-blk.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c index 4bc0729bf7..bed9f13793 100644 --- a/hw/block/dataplane/virtio-blk.c +++ b/hw/block/dataplane/virtio-blk.c @@ -68,7 +68,6 @@ static void complete_request_vring(VirtIOBlockReq *req, unsigned char status) vring_push(&req->dev->dataplane->vring, req->elem, req->qiov.size + sizeof(*req->in)); notify_guest(req->dev->dataplane); - g_slice_free(VirtIOBlockReq, req); } static void handle_notify(EventNotifier *e) |