diff options
Diffstat (limited to 'drivers/staging/erofs/super.c')
| -rw-r--r-- | drivers/staging/erofs/super.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c index b0583cdb079a..b49ebdf6ebda 100644 --- a/drivers/staging/erofs/super.c +++ b/drivers/staging/erofs/super.c @@ -75,6 +75,22 @@ static void destroy_inode(struct inode *inode) call_rcu(&inode->i_rcu, i_callback); } +static bool check_layout_compatibility(struct super_block *sb, + struct erofs_super_block *layout) +{ + const unsigned int requirements = le32_to_cpu(layout->requirements); + + EROFS_SB(sb)->requirements = requirements; + + /* check if current kernel meets all mandatory requirements */ + if (requirements & (~EROFS_ALL_REQUIREMENTS)) { + errln("unidentified requirements %x, please upgrade kernel version", + requirements & ~EROFS_ALL_REQUIREMENTS); + return false; + } + return true; +} + static int superblock_read(struct super_block *sb) { struct erofs_sb_info *sbi; @@ -108,6 +124,9 @@ static int superblock_read(struct super_block *sb) goto out; } + if (!check_layout_compatibility(sb, layout)) + goto out; + sbi->blocks = le32_to_cpu(layout->blocks); sbi->meta_blkaddr = le32_to_cpu(layout->meta_blkaddr); #ifdef CONFIG_EROFS_FS_XATTR |