Patch "arm64: Remove unimplemented syscall log message" has been added to the 4.15-stable tree

This is a note to let you know that I've just added the patch titled

arm64: Remove unimplemented syscall log message

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arm64-remove-unimplemented-syscall-log-message.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Michael Weiser <[email protected]>
Date: Thu, 1 Feb 2018 23:13:36 +0100
Subject: arm64: Remove unimplemented syscall log message

From: Michael Weiser <[email protected]>

commit 1962682d2b2fbe6cfa995a85c53c069fadda473e upstream.

Stop printing a (ratelimited) kernel message for each instance of an unimplemented syscall being called. Userland making an unimplemented syscall is not necessarily misbehaviour and to be expected with a current userland running on an older kernel. Also, the current message looks scary to users but does not actually indicate a real problem nor help them narrow down the cause. Just rely on sys_ni_syscall() to return -ENOSYS.

---
 arch/arm64/kernel/traps.c |    8 --------
 1 file changed, 8 deletions(-)

@@ -526,14 +526,6 @@ asmlinkage long do_ni_syscall(struct pt_
 	}
 #endif
 
-	if (show_unhandled_signals_ratelimited()) {
-		pr_info("%s[%d]: syscall %d\n", current->comm,
-			task_pid_nr(current), regs->syscallno);
-		dump_instr("", regs);
-		if (user_mode(regs))
-			__show_regs(regs);
-	}
-
 	return sys_ni_syscall();
 }
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/arm64-remove-unimplemented-syscall-log-message.patch queue-4.15/arm64-disable-unhandled-signal-log-messages-by-default.patch