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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2025-08-30 19:01:01 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-19 16:23:22 +0200 |
| commit | cd572b903a21af8a5a05d7932acd337bc0f4ea03 (patch) | |
| tree | 63f81b7da4979f8038c52d1d0662fa6f58d384d7 | |
| parent | 5895d78ee7fa67348a44718d71b0c4bc3ff459d5 (diff) | |
| download | linux-cd572b903a21af8a5a05d7932acd337bc0f4ea03.tar.gz linux-cd572b903a21af8a5a05d7932acd337bc0f4ea03.tar.bz2 linux-cd572b903a21af8a5a05d7932acd337bc0f4ea03.zip | |
cramfs: Verify inode mode when loading from disk
[ Upstream commit 7f9d34b0a7cb93d678ee7207f0634dbf79e47fe5 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 6dae27d6f553..9979187a4b3c 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -117,9 +117,18 @@ 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; |