bump version to 8.1.2-6

[pve-qemu.git] / debian / patches / extra / 0011-block-Fix-AioContext-locking-in-qmp_block_resize.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Fri, 8 Dec 2023 13:43:52 +0100
Subject: [PATCH] block: Fix AioContext locking in qmp_block_resize()

The AioContext must be unlocked before calling blk_co_unref(), because
it takes the AioContext lock internally in blk_unref_bh(), which is
scheduled in the main thread. If we don't unlock, the AioContext is
locked twice and nested event loops such as in bdrv_graph_wrlock() will
deadlock.

Cc: qemu-stable@nongnu.org
Fixes: https://issues.redhat.com/browse/RHEL-15965
Fixes: 0c7d204f50c382c6baac8c94bd57af4a022b3888
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(picked up from https://lists.nongnu.org/archive/html/qemu-devel/2023-12/msg01102.html)
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 blockdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/blockdev.c b/blockdev.c
index e6eba61484..c28462a633 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2361,8 +2361,9 @@ void coroutine_fn qmp_block_resize(const char *device, const char *node_name,
 
     bdrv_co_lock(bs);
     bdrv_drained_end(bs);
-    blk_co_unref(blk);
     bdrv_co_unlock(bs);
+
+    blk_co_unref(blk);
 }
 
 void qmp_block_stream(const char *job_id, const char *device,