Patch "x86/pkeys/selftests: Remove dead debugging code, fix dprint_in_signal" has been added to the 4.16-stable tree

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

x86/pkeys/selftests: Remove dead debugging code, fix dprint_in_signal

to the 4.16-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:
x86-pkeys-selftests-remove-dead-debugging-code-fix-dprint_in_signal.patch
and it can be found in the queue-4.16 subdirectory.

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

From: Dave Hansen <[email protected]>
Date: Wed, 9 May 2018 10:13:42 -0700
Subject: x86/pkeys/selftests: Remove dead debugging code, fix dprint_in_signal

From: Dave Hansen <[email protected]>

[ Upstream commit a50093d60464dd51d1ae0c2267b0abe9e1de77f3 ]

There is some noisy debug code at the end of the signal handler. It was disabled by an early, unconditional "return". However, that return also hid a dprint_in_signal=0, which kept dprint_in_signal=1 and effectively locked us into permanent dprint_in_signal=1 behavior.

Remove the return and the dead code, fixing dprint_in_signal.

---
 tools/testing/selftests/x86/protection_keys.c |   16 ----------------
 1 file changed, 16 deletions(-)

@@ -325,22 +325,6 @@ void signal_handler(int signum, siginfo_
 	dprintf1("WARNING: set PRKU=0 to allow faulting instruction to continue\n");
 	pkru_faults++;
 	dprintf1("<<<<==================================================\n");
-	return;
-	if (trapno == 14) {
-		fprintf(stderr,
-			"ERROR: In signal handler, page fault, trapno = %d, ip = %016lx\n",
-			trapno, ip);
-		fprintf(stderr, "si_addr %p\n", si->si_addr);
-		fprintf(stderr, "REG_ERR: %lx\n",
-				(unsigned long)uctxt->uc_mcontext.gregs[REG_ERR]);
-		exit(1);
-	} else {
-		fprintf(stderr, "unexpected trap %d! at 0x%lx\n", trapno, ip);
-		fprintf(stderr, "si_addr %p\n", si->si_addr);
-		fprintf(stderr, "REG_ERR: %lx\n",
-				(unsigned long)uctxt->uc_mcontext.gregs[REG_ERR]);
-		exit(2);
-	}
 	dprint_in_signal = 0;
 }
 

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

queue-4.16/x86-pkeys-selftests-factor-out-instruction-page.patch queue-4.16/x86-pkeys-selftests-fix-pointer-math.patch queue-4.16/x86-pkeys-selftests-adjust-the-self-test-to-fresh-distros-that-export-the-pkeys-abi.patch queue-4.16/x86-pkeys-selftests-add-a-test-for-pkey-0.patch queue-4.16/x86-pkeys-selftests-stop-using-assert.patch queue-4.16/x86-pkeys-selftests-save-off-prot-for-allocations.patch queue-4.16/x86-pkeys-selftests-remove-dead-debugging-code-fix-dprint_in_signal.patch queue-4.16/x86-mpx-selftests-adjust-the-self-test-to-fresh-distros-that-export-the-mpx-abi.patch queue-4.16/x86-pkeys-selftests-add-prot_exec-test.patch queue-4.16/x86-pkeys-selftests-allow-faults-on-unknown-keys.patch queue-4.16/x86-pkeys-selftests-give-better-unexpected-fault-error-messages.patch queue-4.16/x86-pkeys-selftests-avoid-printf-in-signal-deadlocks.patch queue-4.16/x86-pkeys-selftests-fix-pkey-exhaustion-test-off-by-one.patch