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

607eb266 · Andries Brouwer <[email protected]> · 2006-08-27 01:23:43 -07:00

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

Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: 607eb266aea9dd2abe515985e12c5cd8b32546e8
Parents: f5fb09fa

Changes

1 files changed · +1 −1

File	Status	Add	Del	Content
fs/ext2/super.c	modified	+1	−1	View file

fs/ext2/super.c

View file

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index f2702cd..681dea8 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;