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authorAndries Brouwer <Andries.Brouwer@cwi.nl>2006-08-27 01:23:43 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-27 11:01:30 -0700
commit607eb266aea9dd2abe515985e12c5cd8b32546e8 (patch)
tree3b1625033430f2f9091bfe749554c245a223f666 /fs
parentf5fb09fa3392ad43fbcfc2f4580752f383ab5996 (diff)
downloadlinux-stericsson-607eb266aea9dd2abe515985e12c5cd8b32546e8.tar.gz
[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>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext2/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index f2702cda9779..681dea8f9532 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -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;