diff options
| author | Andries Brouwer <Andries.Brouwer@cwi.nl> | 2006-08-27 04:23:43 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-27 14:01:30 -0400 |
| commit | 607eb266aea9dd2abe515985e12c5cd8b32546e8 (patch) | |
| tree | 3b1625033430f2f9091bfe749554c245a223f666 | |
| parent | f5fb09fa3392ad43fbcfc2f4580752f383ab5996 (diff) | |
[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>
| -rw-r--r-- | fs/ext2/super.c | 2 |
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) | |||
| 775 | if (EXT2_INODE_SIZE(sb) == 0) | 775 | if (EXT2_INODE_SIZE(sb) == 0) |
| 776 | goto cantfind_ext2; | 776 | goto cantfind_ext2; |
| 777 | sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb); | 777 | sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb); |
| 778 | if (sbi->s_inodes_per_block == 0) | 778 | if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0) |
| 779 | goto cantfind_ext2; | 779 | goto cantfind_ext2; |
| 780 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | 780 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
| 781 | sbi->s_inodes_per_block; | 781 | sbi->s_inodes_per_block; |