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[PATCH] ext2: prevent div-by-zero on corrupted fs 

Mounting an ext2 filesystem with zero s_inodes_per_group will cause a
divide error.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andries Brouwer 2006-08-27 01:23:43 -07:00 committed by Linus Torvalds
parent f5fb09fa33
commit 607eb266ae
1 changed files with 1 additions and 1 deletions
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2
fs/ext2/super.c
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@ -775,7 +775,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
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;