From 344fa64ef8f6740e99b32ab788b6e3742d7284b3 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 12 Feb 2020 13:58:35 +0000 Subject: security: Add a hook for the point of notification insertion Add a security hook that allows an LSM to rule on whether a notification message is allowed to be inserted into a particular watch queue. The hook is given the following information: (1) The credentials of the triggerer (which may be init_cred for a system notification, eg. a hardware error). (2) The credentials of the whoever set the watch. (3) The notification message. Signed-off-by: David Howells Acked-by: James Morris cc: Casey Schaufler cc: Stephen Smalley cc: linux-security-module@vger.kernel.org --- security/security.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'security/security.c') diff --git a/security/security.c b/security/security.c index 7fed24b9d57e..7d55607120b4 100644 --- a/security/security.c +++ b/security/security.c @@ -2007,6 +2007,15 @@ int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) } EXPORT_SYMBOL(security_inode_getsecctx); +#ifdef CONFIG_WATCH_QUEUE +int security_post_notification(const struct cred *w_cred, + const struct cred *cred, + struct watch_notification *n) +{ + return call_int_hook(post_notification, 0, w_cred, cred, n); +} +#endif /* CONFIG_WATCH_QUEUE */ + #ifdef CONFIG_SECURITY_NETWORK int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) -- cgit v1.2.3