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minixfs: Verify inode mode when loading from disk

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The inode mode loaded from corrupted disk can be invalid. Do like what
commit 0a9e740513 ("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/ec982681-84b8-4624-94fa-8af15b77cbd2@I-love.SAKURA.ne.jp
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Tetsuo Handa
2025-08-13 00:17:44 +09:00
committed by Christian Brauner
parent 8e7e265d55
commit 7386197093
1 changed files with 7 additions and 1 deletions
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8
fs/minix/inode.c
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@@ -492,8 +492,14 @@ void minix_set_inode(struct inode *inode, dev_t rdev)
inode->i_op = &minix_symlink_inode_operations; inode->i_op = &minix_symlink_inode_operations;
inode_nohighmem(inode); inode_nohighmem(inode);
inode->i_mapping->a_ops = &minix_aops; inode->i_mapping->a_ops = &minix_aops;
} else } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
init_special_inode(inode, inode->i_mode, rdev); init_special_inode(inode, inode->i_mode, rdev);
} else {
printk(KERN_DEBUG "MINIX-fs: Invalid file type 0%04o for inode %lu.\n",
inode->i_mode, inode->i_ino);
make_bad_inode(inode);
}
} }
/* /*