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| author | Kevin Wolf | 2022-02-03 15:05:33 +0100 |
|---|---|---|
| committer | Kevin Wolf | 2022-02-11 09:44:16 +0100 |
| commit | aba8205be0707b9d108e32254e186ba88107a869 (patch) | |
| tree | 8bf1266a5df2ac9e32eb8facf5e98da779bd5bcc /blockdev.c | |
| parent | Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20220208'... (diff) | |
| download | qemu-aba8205be0707b9d108e32254e186ba88107a869.tar.gz qemu-aba8205be0707b9d108e32254e186ba88107a869.tar.xz qemu-aba8205be0707b9d108e32254e186ba88107a869.zip | |
block: Lock AioContext for drain_end in blockdev-reopen
bdrv_subtree_drained_end() requires the caller to hold the AioContext
lock for the drained node. Not doing this for nodes outside of the main
AioContext leads to crashes when AIO_WAIT_WHILE() needs to wait and
tries to temporarily release the lock.
Fixes: 3908b7a8994fa5ef7a89aa58cd5a02fc58141592
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2046659
Reported-by: Qing Wang <qinwang@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20220203140534.36522-2-kwolf@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/blockdev.c b/blockdev.c index 8197165bb5..42e098b458 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3530,6 +3530,7 @@ void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) { BlockReopenQueue *queue = NULL; GSList *drained = NULL; + GSList *p; /* Add each one of the BDS that we want to reopen to the queue */ for (; reopen_list != NULL; reopen_list = reopen_list->next) { @@ -3579,7 +3580,15 @@ void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) fail: bdrv_reopen_queue_free(queue); - g_slist_free_full(drained, (GDestroyNotify) bdrv_subtree_drained_end); + for (p = drained; p; p = p->next) { + BlockDriverState *bs = p->data; + AioContext *ctx = bdrv_get_aio_context(bs); + + aio_context_acquire(ctx); + bdrv_subtree_drained_end(bs); + aio_context_release(ctx); + } + g_slist_free(drained); } void qmp_blockdev_del(const char *node_name, Error **errp) |