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Message-Id: <20180701160852.846759288@linuxfoundation.org>
Date: Sun, 1 Jul 2018 18:21:23 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Chris Zankel <chris@...kel.net>,
Max Filippov <jcmvbkbc@...il.com>,
linux-xtensa@...ux-xtensa.org,
"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 4.14 011/157] signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric W. Biederman <ebiederm@...ssion.com>
commit 7de712ccc096b81d23cc0a941cd9b8cb3956605d upstream.
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@...kel.net>
Cc: Max Filippov <jcmvbkbc@...il.com>
Cc: linux-xtensa@...ux-xtensa.org
Cc: stable@...r.kernel.org
Acked-by: Max Filippov <jcmvbkbc@...il.com>
Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3")
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
arch/xtensa/kernel/traps.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -336,7 +336,7 @@ 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
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