commit
9c83465f3245c2faa82ffeb7016f40f02bfaa0ad upstream.
Commit
db68ce10c4f0a27c ("new helper: uaccess_kernel()") replaced
segment_eq(get_fs(), KERNEL_DS) with uaccess_kernel(). But the correct
method for tomoyo to check whether current is a kernel thread in order
to assume that kernel threads are privileged for socket operations was
(current->flags & PF_KTHREAD). Now that uaccess_kernel() became 0 on x86,
tomoyo has to fix this problem. Do like commit
942cb357ae7d9249 ("Smack:
Handle io_uring kernel thread privileges") does.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
static bool tomoyo_kernel_service(void)
{
/* Nothing to do if I am a kernel service. */
- return uaccess_kernel();
+ return (current->flags & (PF_KTHREAD | PF_IO_WORKER)) == PF_KTHREAD;
}
/**