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block: Take graph rdlock in bdrv_change_aio_context() 

The function reads the parents list, so it needs to hold the graph lock.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-ID: <20230911094620.45040-19-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Kevin Wolf 2023-09-11 11:46:17 +02:00
parent 733467a1e6
commit 7f831d29e3
1 changed files with 4 additions and 0 deletions
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4
block.c
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@ -7688,17 +7688,21 @@ static bool bdrv_change_aio_context(BlockDriverState *bs, AioContext *ctx,
return true;
}
bdrv_graph_rdlock_main_loop();
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (!bdrv_parent_change_aio_context(c, ctx, visited, tran, errp)) {
bdrv_graph_rdunlock_main_loop();
return false;
}
}
QLIST_FOREACH(c, &bs->children, next) {
if (!bdrv_child_change_aio_context(c, ctx, visited, tran, errp)) {
bdrv_graph_rdunlock_main_loop();
return false;
}
}
bdrv_graph_rdunlock_main_loop();
state = g_new(BdrvStateSetAioContext, 1);
*state = (BdrvStateSetAioContext) {