4.17-stable review patch. If anyone has any objections, please let me know.
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From: Eric W. Biederman ebiederm@xmission.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@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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.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 @@ -338,7 +338,7 @@ 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