From: Mounting an ext2 filesystem with zero s_inodes_per_group will cause a divide error. Signed-off-by: Andrew Morton --- fs/ext2/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN fs/ext2/super.c~ext2-prevent-div-by-zero-on-corrupted-fs fs/ext2/super.c --- a/fs/ext2/super.c~ext2-prevent-div-by-zero-on-corrupted-fs +++ a/fs/ext2/super.c @@ -775,7 +775,7 @@ 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; _