linux-kernel - [PATCH] afs: Increase buffer size in afs_update_volume

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Message-ID: <20240211150442.3416-1-d.dulov@aladdin.ru>
Date: Sun, 11 Feb 2024 07:04:42 -0800
From: Daniil Dulov <d.dulov@...ddin.ru>
To: <linux-afs@...ts.infradead.org>
CC: Daniil Dulov <d.dulov@...ddin.ru>, Marc Dionne <marc.dionne@...istor.com>,
	David Howells <dhowells@...hat.com>, <linux-kernel@...r.kernel.org>,
	<lvc-project@...uxtesting.org>
Subject: [PATCH] afs: Increase buffer size in afs_update_volume_status()

The max length of volume->vid value is 20 characters.
So increase idbuf[] size up to 20 to avoid overflow.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: d2ddc776a458 ("afs: Overhaul volume and server record caching and fileserver rotation")
Signed-off-by: Daniil Dulov <d.dulov@...ddin.ru>
---
 fs/afs/volume.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index f84194b791d3..9d0da38bbcf6 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -302,7 +302,7 @@ static int afs_update_volume_status(struct afs_volume *volume, struct key *key)
 {
 	struct afs_server_list *new, *old, *discard;
 	struct afs_vldb_entry *vldb;
-	char idbuf[16];
+	char idbuf[19];
 	int ret, idsz;
 
 	_enter("");
-- 
2.25.1