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| author |   Pablo Neira Ayuso <pablo@netfilter.org> | 2019-06-25 01:32:59 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-06-25 01:32:59 +0200 |
| commit | 1c5ba67d2277ac2faf37c61076e8b5fa312be492 (patch) | |
| tree | a645a1a2f7aea7faafcd67c6ba1bfd424b95cd7d /drivers/staging/erofs/super.c | |
| parent | netfilter: nf_tables: add support for matching IPv4 options (diff) | |
| parent | Merge branch 'cxgb4-Reference-count-MPS-TCAM-entries-within-a-PF' (diff) | |
| download | linux-dev-1c5ba67d2277ac2faf37c61076e8b5fa312be492.tar.xz linux-dev-1c5ba67d2277ac2faf37c61076e8b5fa312be492.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Resolve conflict between d2912cb15bdd ("treewide: Replace GPLv2
boilerplate/reference with SPDX - rule 500") removing the GPL disclaimer
and fe03d4745675 ("Update my email address") which updates Jozsef
Kadlecsik's email.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'drivers/staging/erofs/super.c')
| -rw-r--r-- | drivers/staging/erofs/super.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c index 399847d21146..cadbcc11702a 100644 --- a/drivers/staging/erofs/super.c +++ b/drivers/staging/erofs/super.c @@ -71,6 +71,22 @@ static void free_inode(struct inode *inode) kmem_cache_free(erofs_inode_cachep, vi); } +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; @@ -104,6 +120,9 @@ 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 @@ -457,6 +476,7 @@ static int erofs_read_super(struct super_block *sb, */ err_devname: dput(sb->s_root); + sb->s_root = NULL; err_iget: #ifdef EROFS_FS_HAS_MANAGED_CACHE iput(sbi->managed_cache); |