diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2025-08-30 19:01:01 +0900 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-09-01 13:13:10 +0200 |
| commit | 7f9d34b0a7cb93d678ee7207f0634dbf79e47fe5 (patch) | |
| tree | 38a5d659ef618688e4316cfdb28d825d51ab7ccc /fs/cramfs | |
| parent | e5bca063c150877c45b88ff134b6ef7a5eae8e7a (diff) | |
cramfs: Verify inode mode when loading from disk
The inode mode loaded from corrupted disk can be invalid. Do like what
commit 0a9e74051313 ("isofs: Verify inode mode when loading from disk")
does.
Reported-by: syzbot <syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/429b3ef1-13de-4310-9a8e-c2dc9a36234a@I-love.SAKURA.ne.jp
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/cramfs')
| -rw-r--r-- | fs/cramfs/inode.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index b002e9b734f9..12daa85ed941 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -116,9 +116,18 @@ static struct inode *get_cramfs_inode(struct super_block *sb, inode_nohighmem(inode); inode->i_data.a_ops = &cramfs_aops; break; - default: + case S_IFCHR: + case S_IFBLK: + case S_IFIFO: + case S_IFSOCK: init_special_inode(inode, cramfs_inode->mode, old_decode_dev(cramfs_inode->size)); + break; + default: + printk(KERN_DEBUG "CRAMFS: Invalid file type 0%04o for inode %lu.\n", + inode->i_mode, inode->i_ino); + iget_failed(inode); + return ERR_PTR(-EIO); } inode->i_mode = cramfs_inode->mode; |