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reiserfs: Initialize sec->length in reiserfs_security_init().

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syzbot is reporting that sec->length is not initialized.

Since security_inode_init_security() returns 0 when initxattrs is provided
but call_int_hook(inode_init_security) returned -EOPNOTSUPP, control will
reach to "if (sec->length && ...) {" without initializing sec->length.

Reported-by: syzbot <syzbot+00a3779539a23cbee38c@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=00a3779539a23cbee38c
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 52ca4b6435 ("reiserfs: Switch to security_inode_init_security()")
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Tetsuo Handa 2023-05-11 23:48:45 +09:00 committed by Paul Moore
parent a495108ea9
commit d031f4e8b4
1 changed files with 1 additions and 0 deletions
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1
fs/reiserfs/xattr_security.c
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@ -67,6 +67,7 @@ int reiserfs_security_init(struct inode *dir, struct inode *inode,
sec->name = NULL;
sec->value = NULL;
sec->length = 0;
/* Don't add selinux attributes on xattrs - they'll never get used */
if (IS_PRIVATE(dir))