diff options
| -rw-r--r-- | fs/fat/inode.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c index ffbbf0520d9e..4f818f7fa155 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -158,8 +158,14 @@ static inline int __fat_get_block(struct inode *inode, sector_t iblock, err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create, false); if (err) return err; + if (!phys) { + fat_fs_error(sb, + "invalid FAT chain (i_pos %lld, last_block %llu)", + MSDOS_I(inode)->i_pos, + (unsigned long long)last_block); + return -EIO; + } - BUG_ON(!phys); BUG_ON(*max_blocks != mapped_blocks); set_buffer_new(bh_result); map_bh(bh_result, sb, phys); |