From: <Andries.Brouwer@cwi.nl>
To: akpm@osdl.org, torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org
Subject: ext2 fix
Date: Tue, 22 Aug 2006 13:01:45 +0200 (MEST) [thread overview]
Message-ID: <200608221101.k7MB1jm20630@apps.cwi.nl> (raw)
Mounting an ext2 filesystem with zero s_inodes_per_group
will cause a divide error. Below a patch against 2.6.17.8.
Andries
diff -uprN -X /linux/dontdiff a/fs/ext2/super.c b/fs/ext2/super.c
--- a/fs/ext2/super.c 2006-08-07 16:01:12.000000000 +0200
+++ b/fs/ext2/super.c 2006-08-22 12:36:45.682620352 +0200
@@ -776,7 +776,7 @@ static int ext2_fill_super(struct super_
if (EXT2_INODE_SIZE(sb) == 0)
goto cantfind_ext2;
sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
- if (sbi->s_inodes_per_block == 0)
+ if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
goto cantfind_ext2;
sbi->s_itb_per_group = sbi->s_inodes_per_group /
sbi->s_inodes_per_block;
reply other threads:[~2006-08-22 11:01 UTC|newest]
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