From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:59914 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750860AbdGYTND (ORCPT ); Tue, 25 Jul 2017 15:13:03 -0400 Subject: Patch "MIPS: Send SIGILL for BPOSGE32 in `__compute_return_epc_for_insn'" has been added to the 3.18-stable tree To: macro@imgtec.com, gregkh@linuxfoundation.org, james.hogan@imgtec.com, ralf@linux-mips.org Cc: , From: Date: Tue, 25 Jul 2017 12:12:56 -0700 Message-ID: <1501009976166128@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled MIPS: Send SIGILL for BPOSGE32 in `__compute_return_epc_for_insn' to the 3.18-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: mips-send-sigill-for-bposge32-in-__compute_return_epc_for_insn.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7b82c1058ac1f8f8b9f2b8786b1f710a57a870a8 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Fri, 16 Jun 2017 00:08:29 +0100 Subject: MIPS: Send SIGILL for BPOSGE32 in `__compute_return_epc_for_insn' From: Maciej W. Rozycki commit 7b82c1058ac1f8f8b9f2b8786b1f710a57a870a8 upstream. Fix commit e50c0a8fa60d ("Support the MIPS32 / MIPS64 DSP ASE.") and send SIGILL rather than SIGBUS whenever an unimplemented BPOSGE32 DSP ASE instruction has been encountered in `__compute_return_epc_for_insn' as our Reserved Instruction exception handler would in response to an attempt to actually execute the instruction. Sending SIGBUS only makes sense for the unaligned PC case, since moved to `__compute_return_epc'. Adjust function documentation accordingly, correct formatting and use `pr_info' rather than `printk' as the other exit path already does. Fixes: e50c0a8fa60d ("Support the MIPS32 / MIPS64 DSP ASE.") Signed-off-by: Maciej W. Rozycki Cc: James Hogan Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 2.6.14+ Patchwork: https://patchwork.linux-mips.org/patch/16396/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman --- arch/mips/kernel/branch.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -396,7 +396,7 @@ int __MIPS16e_compute_return_epc(struct * * @regs: Pointer to pt_regs * @insn: branch instruction to decode - * @returns: -EFAULT on error and forces SIGBUS, and on success + * @returns: -EFAULT on error and forces SIGILL, and on success * returns 0 or BRANCH_LIKELY_TAKEN as appropriate after * evaluating the branch. */ @@ -633,8 +633,9 @@ int __compute_return_epc_for_insn(struct return ret; sigill: - printk("%s: DSP branch but not DSP ASE - sending SIGBUS.\n", current->comm); - force_sig(SIGBUS, current); + pr_info("%s: DSP branch but not DSP ASE - sending SIGILL.\n", + current->comm); + force_sig(SIGILL, current); return -EFAULT; } EXPORT_SYMBOL_GPL(__compute_return_epc_for_insn); Patches currently in stable-queue which might be from macro@imgtec.com are queue-3.18/mips-send-sigill-for-bposge32-in-__compute_return_epc_for_insn.patch queue-3.18/mips-actually-decode-jalx-in-__compute_return_epc_for_insn.patch queue-3.18/mips-fix-unaligned-pc-interpretation-in-compute_return_epc.patch queue-3.18/mips-math-emu-prevent-wrong-isa-mode-instruction-emulation.patch