diff options
| author | Wang Liang <wangliangzz@inspur.com> | 2023-04-24 18:39:02 +0800 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2023-05-10 20:50:38 +0300 |
| commit | f528cfc3fa91dacc0f5e0bf494164f7d4548e35f (patch) | |
| tree | c35721f15d352525f433a04563b9dda93682b152 /block/monitor/block-hmp-cmds.c | |
| parent | bb47b5bc2e7a1e7e12c542b8e6510fa37c23b659 (diff) | |
block/monitor: Fix crash when executing HMP commit
hmp_commit() calls blk_is_available() from a non-coroutine context (and
in the main loop). blk_is_available() is a co_wrapper_mixed_bdrv_rdlock
function, and in the non-coroutine context it calls AIO_WAIT_WHILE(),
which crashes if the aio_context lock is not taken before.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1615
Signed-off-by: Wang Liang <wangliangzz@inspur.com>
Message-Id: <20230424103902.45265-1-wangliangzz@126.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 8c1e8fb2e7fc2cbeb57703e143965a4cd3ad301a)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'block/monitor/block-hmp-cmds.c')
| -rw-r--r-- | block/monitor/block-hmp-cmds.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c index 2846083546..ca2599de44 100644 --- a/block/monitor/block-hmp-cmds.c +++ b/block/monitor/block-hmp-cmds.c @@ -214,15 +214,17 @@ void hmp_commit(Monitor *mon, const QDict *qdict) error_report("Device '%s' not found", device); return; } - if (!blk_is_available(blk)) { - error_report("Device '%s' has no medium", device); - return; - } bs = bdrv_skip_implicit_filters(blk_bs(blk)); aio_context = bdrv_get_aio_context(bs); aio_context_acquire(aio_context); + if (!blk_is_available(blk)) { + error_report("Device '%s' has no medium", device); + aio_context_release(aio_context); + return; + } + ret = bdrv_commit(bs); aio_context_release(aio_context); |