linux-kernel - Re: [PATCH v2] afs: Increase buffer size in afs_update_volume

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Message-ID: <125563.1708338814@warthog.procyon.org.uk>
Date: Mon, 19 Feb 2024 10:33:34 +0000
From: David Howells <dhowells@...hat.com>
To: Daniil Dulov <d.dulov@...ddin.ru>
Cc: dhowells@...hat.com, Jeffrey E Altman <jaltman@...istor.com>,
    linux-afs@...ts.infradead.org,
    Marc Dionne <marc.dionne@...istor.com>, linux-kernel@...r.kernel.org,
    lvc-project@...uxtesting.org
Subject: Re: [PATCH v2] afs: Increase buffer size in afs_update_volume_status()

I suggest the attached instead.

David
---
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 020ecd45e476..af3a3f57c1b3 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -353,7 +353,7 @@ 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[24];
 	int ret, idsz;
 
 	_enter("");
@@ -361,7 +361,7 @@ static int afs_update_volume_status(struct afs_volume *volume, struct key *key)
 	/* We look up an ID by passing it as a decimal string in the
 	 * operation's name parameter.
 	 */
-	idsz = sprintf(idbuf, "%llu", volume->vid);
+	idsz = snprintf(idbuf, sizeof(idbuf), "%llu", volume->vid);
 
 	vldb = afs_vl_lookup_vldb(volume->cell, key, idbuf, idsz);
 	if (IS_ERR(vldb)) {