Patch "mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy" 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

mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy

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:
mn10300-misalignment-use-sigsegv-segv_maperr-to-report-a-failed-user-copy.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: "Eric W. Biederman" <[email protected]>
Date: Tue, 1 Aug 2017 05:02:38 -0500
Subject: mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy

From: Eric W. Biederman <[email protected]>

commit 6ac1dc736b323011a55ecd1fc5897c24c4f77cbd upstream.

Setting si_code to 0 is the same a setting si_code to SI_USER which is definitely not correct. With si_code set to SI_USER si_pid and si_uid will be copied to userspace instead of si_addr. Which is very wrong.

So fix this by using a sensible si_code (SEGV_MAPERR) for this failure.

---
 arch/mn10300/mm/misalignment.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -437,7 +437,7 @@ transfer_failed:
 
 	info.si_signo	= SIGSEGV;
 	info.si_errno	= 0;
-	info.si_code	= 0;
+	info.si_code	= SEGV_MAPERR;
 	info.si_addr	= (void *) regs->pc;
 	force_sig_info(SIGSEGV, &info, current);
 	return;

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

queue-4.15/signal-openrisc-fix-do_unaligned_access-to-send-the-proper-signal.patch queue-4.15/signal-sh-ensure-si_signo-is-initialized-in-do_divide_error.patch queue-4.15/mn10300-misalignment-use-sigsegv-segv_maperr-to-report-a-failed-user-copy.patch