From 0169d8f33ab7a58675a94c18122dba58d8f6a1b8 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 25 Mar 2021 18:42:50 -0600 Subject: Revert "Smack: Handle io_uring kernel thread privileges" This reverts commit 942cb357ae7d9249088e3687ee6a00ed2745a0c7. The io_uring PF_IO_WORKER threads no longer have PF_KTHREAD set, so no need to special case them for credential checks. Cc: Casey Schaufler Signed-off-by: Jens Axboe Signed-off-by: Casey Schaufler --- security/smack/smack_access.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'security/smack') diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c index 7eabb448acab..efe2406a3960 100644 --- a/security/smack/smack_access.c +++ b/security/smack/smack_access.c @@ -688,10 +688,9 @@ bool smack_privileged_cred(int cap, const struct cred *cred) bool smack_privileged(int cap) { /* - * Kernel threads may not have credentials we can use. - * The io_uring kernel threads do have reliable credentials. + * All kernel tasks are privileged */ - if ((current->flags & (PF_KTHREAD | PF_IO_WORKER)) == PF_KTHREAD) + if (unlikely(current->flags & PF_KTHREAD)) return true; return smack_privileged_cred(cap, current_cred()); -- cgit v1.2.3