From: Eric W. Biederman <ebiederm@xmission.com>
Date: Fri, 20 Apr 2018 14:14:56 +0000 (-0500)
Subject: signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7de712ccc096b81d23cc0a941cd9b8cb3956605d;p=linux.git

signal/xtensa: Consistenly use SIGBUS in do_unaligned_user

While working on changing this code to use force_sig_fault I
discovered that do_unaliged_user is sets si_signo to SIGBUS and passes
SIGSEGV to force_sig_info.  Which is just b0rked.

The code is reporting a SIGBUS error so replace the SIGSEGV with SIGBUS.

Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: linux-xtensa@linux-xtensa.org
Cc: stable@vger.kernel.org
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---

diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 51771929f3414..90b509f65b6f2 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -339,7 +339,7 @@ do_unaligned_user (struct pt_regs *regs)
 	info.si_errno = 0;
 	info.si_code = BUS_ADRALN;
 	info.si_addr = (void *) regs->excvaddr;
-	force_sig_info(SIGSEGV, &info, current);
+	force_sig_info(SIGBUS, &info, current);
 
 }
 #endif