From patchwork Thu Jul 15 18:12:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Eric W. Biederman" X-Patchwork-Id: 1505847 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4GQjC726Lgz9sfG for ; Fri, 16 Jul 2021 04:12:35 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237618AbhGOSP1 (ORCPT ); Thu, 15 Jul 2021 14:15:27 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:48242 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233916AbhGOSP1 (ORCPT ); Thu, 15 Jul 2021 14:15:27 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out01.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1m45qb-00BetQ-1G; Thu, 15 Jul 2021 12:12:33 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95]:57078 helo=email.xmission.com) by in02.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1m45qX-00Aowo-8D; Thu, 15 Jul 2021 12:12:32 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Marco Elver Cc: Arnd Bergmann , Florian Weimer , "David S. Miller" , Peter Zijlstra , Ingo Molnar , Thomas Gleixner , Peter Collingbourne , Dmitry Vyukov , Alexander Potapenko , sparclinux , linux-arch , Linux Kernel Mailing List , Linux API , kasan-dev References: <87a6mnzbx2.fsf_-_@disp2133> Date: Thu, 15 Jul 2021 13:12:22 -0500 In-Reply-To: <87a6mnzbx2.fsf_-_@disp2133> (Eric W. Biederman's message of "Thu, 15 Jul 2021 13:09:45 -0500") Message-ID: <87mtqnxx89.fsf_-_@disp2133> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 X-XM-SPF: eid=1m45qX-00Aowo-8D;;;mid=<87mtqnxx89.fsf_-_@disp2133>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX19By38Gj/ji0SKJTJQ/ai4ehN8lLz5KTi8= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on sa04.xmission.com X-Spam-Level: ** X-Spam-Status: No, score=2.0 required=8.0 tests=ALL_TRUSTED,BAYES_50, DCC_CHECK_NEGATIVE,T_TM2_M_HEADER_IN_MSG,T_TooManySym_01,XMNoVowels, XMSubLong autolearn=disabled version=3.4.2 X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.5000] * 1.5 XMNoVowels Alpha-numberic number with no vowels * 0.7 XMSubLong Long Subject * 0.0 T_TM2_M_HEADER_IN_MSG BODY: No description available. * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: **;Marco Elver X-Spam-Relay-Country: X-Spam-Timing: total 3157 ms - load_scoreonly_sql: 0.06 (0.0%), signal_user_changed: 9 (0.3%), b_tie_ro: 7 (0.2%), parse: 7 (0.2%), extract_message_metadata: 19 (0.6%), get_uri_detail_list: 7 (0.2%), tests_pri_-1000: 14 (0.4%), tests_pri_-950: 1.36 (0.0%), tests_pri_-900: 1.00 (0.0%), tests_pri_-90: 101 (3.2%), check_bayes: 99 (3.1%), b_tokenize: 26 (0.8%), b_tok_get_all: 14 (0.4%), b_comp_prob: 3.3 (0.1%), b_tok_touch_all: 51 (1.6%), b_finish: 1.60 (0.1%), tests_pri_0: 2983 (94.5%), check_dkim_signature: 1.29 (0.0%), check_dkim_adsp: 3.0 (0.1%), poll_dns_idle: 0.71 (0.0%), tests_pri_10: 2.5 (0.1%), tests_pri_500: 13 (0.4%), rewrite_mail: 0.00 (0.0%) Subject: [PATCH 4/6] signal/sparc: si_trapno is only used with SIGILL ILL_ILLTRP X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org While reviewing the signal handlers on sparc it became clear that si_trapno is only set to a non-zero value when sending SIGILL with si_code ILL_ILLTRP. Add force_sig_fault_trapno and send SIGILL ILL_ILLTRP with it. Remove the define of __ARCH_SI_TRAPNO and remove the always zero si_trapno parameter from send_sig_fault and force_sig_fault. v1: https://lkml.kernel.org/r/m1eeers7q7.fsf_-_@fess.ebiederm.org v2: https://lkml.kernel.org/r/20210505141101.11519-7-ebiederm@xmission.com Signed-off-by: "Eric W. Biederman" Reviewed-by: Marco Elver --- arch/sparc/include/uapi/asm/siginfo.h | 3 -- arch/sparc/kernel/process_64.c | 2 +- arch/sparc/kernel/sys_sparc_32.c | 2 +- arch/sparc/kernel/sys_sparc_64.c | 2 +- arch/sparc/kernel/traps_32.c | 22 +++++++------- arch/sparc/kernel/traps_64.c | 44 ++++++++++++--------------- arch/sparc/kernel/unaligned_32.c | 2 +- arch/sparc/mm/fault_32.c | 2 +- arch/sparc/mm/fault_64.c | 2 +- include/linux/sched/signal.h | 1 + kernel/signal.c | 19 ++++++++++++ 11 files changed, 56 insertions(+), 45 deletions(-) diff --git a/arch/sparc/include/uapi/asm/siginfo.h b/arch/sparc/include/uapi/asm/siginfo.h index 68bdde4c2a2e..0e7c27522aed 100644 --- a/arch/sparc/include/uapi/asm/siginfo.h +++ b/arch/sparc/include/uapi/asm/siginfo.h @@ -8,9 +8,6 @@ #endif /* defined(__sparc__) && defined(__arch64__) */ - -#define __ARCH_SI_TRAPNO - #include diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c index d33c58a58d4f..547b06b49ce3 100644 --- a/arch/sparc/kernel/process_64.c +++ b/arch/sparc/kernel/process_64.c @@ -518,7 +518,7 @@ void synchronize_user_stack(void) static void stack_unaligned(unsigned long sp) { - force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) sp, 0); + force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) sp); } static const char uwfault32[] = KERN_INFO \ diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index be77538bc038..082a551897ed 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -151,7 +151,7 @@ sparc_breakpoint (struct pt_regs *regs) #ifdef DEBUG_SPARC_BREAKPOINT printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc); #endif - force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc, 0); + force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc); #ifdef DEBUG_SPARC_BREAKPOINT printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc); diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 6b92fadb6ec7..1e9a9e016237 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -514,7 +514,7 @@ asmlinkage void sparc_breakpoint(struct pt_regs *regs) #ifdef DEBUG_SPARC_BREAKPOINT printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); #endif - force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->tpc, 0); + force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->tpc); #ifdef DEBUG_SPARC_BREAKPOINT printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); #endif diff --git a/arch/sparc/kernel/traps_32.c b/arch/sparc/kernel/traps_32.c index 247a0d9683b2..5630e5a395e0 100644 --- a/arch/sparc/kernel/traps_32.c +++ b/arch/sparc/kernel/traps_32.c @@ -102,8 +102,8 @@ void do_hw_interrupt(struct pt_regs *regs, unsigned long type) if(regs->psr & PSR_PS) die_if_kernel("Kernel bad trap", regs); - force_sig_fault(SIGILL, ILL_ILLTRP, - (void __user *)regs->pc, type - 0x80); + force_sig_fault_trapno(SIGILL, ILL_ILLTRP, + (void __user *)regs->pc, type - 0x80); } void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc, @@ -116,7 +116,7 @@ void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned lon regs->pc, *(unsigned long *)regs->pc); #endif - send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, 0, current); + send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, current); } void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc, @@ -124,7 +124,7 @@ void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long n { if(psr & PSR_PS) die_if_kernel("Penguin instruction from Penguin mode??!?!", regs); - send_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)pc, 0, current); + send_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)pc, current); } /* XXX User may want to be allowed to do this. XXX */ @@ -145,7 +145,7 @@ void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc, unsigned lon #endif send_sig_fault(SIGBUS, BUS_ADRALN, /* FIXME: Should dig out mna address */ (void *)0, - 0, current); + current); } static unsigned long init_fsr = 0x0UL; @@ -291,7 +291,7 @@ void do_fpe_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc, else if (fsr & 0x01) code = FPE_FLTRES; } - send_sig_fault(SIGFPE, code, (void __user *)pc, 0, fpt); + send_sig_fault(SIGFPE, code, (void __user *)pc, fpt); #ifndef CONFIG_SMP last_task_used_math = NULL; #endif @@ -305,7 +305,7 @@ void handle_tag_overflow(struct pt_regs *regs, unsigned long pc, unsigned long n { if(psr & PSR_PS) die_if_kernel("Penguin overflow trap from kernel mode", regs); - send_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)pc, 0, current); + send_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)pc, current); } void handle_watchpoint(struct pt_regs *regs, unsigned long pc, unsigned long npc, @@ -327,13 +327,13 @@ void handle_reg_access(struct pt_regs *regs, unsigned long pc, unsigned long npc printk("Register Access Exception at PC %08lx NPC %08lx PSR %08lx\n", pc, npc, psr); #endif - force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)pc, 0); + force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)pc); } void handle_cp_disabled(struct pt_regs *regs, unsigned long pc, unsigned long npc, unsigned long psr) { - send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current); + send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, current); } void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long npc, @@ -343,13 +343,13 @@ void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long n printk("Co-Processor Exception at PC %08lx NPC %08lx PSR %08lx\n", pc, npc, psr); #endif - send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current); + send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, current); } void handle_hw_divzero(struct pt_regs *regs, unsigned long pc, unsigned long npc, unsigned long psr) { - send_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)pc, 0, current); + send_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)pc, current); } #ifdef CONFIG_DEBUG_BUGVERBOSE diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c index a850dccd78ea..6863025ed56d 100644 --- a/arch/sparc/kernel/traps_64.c +++ b/arch/sparc/kernel/traps_64.c @@ -107,8 +107,8 @@ void bad_trap(struct pt_regs *regs, long lvl) regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGILL, ILL_ILLTRP, - (void __user *)regs->tpc, lvl); + force_sig_fault_trapno(SIGILL, ILL_ILLTRP, + (void __user *)regs->tpc, lvl); } void bad_trap_tl1(struct pt_regs *regs, long lvl) @@ -201,8 +201,7 @@ void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, un regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGSEGV, SEGV_MAPERR, - (void __user *)regs->tpc, 0); + force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc); out: exception_exit(prev_state); } @@ -237,7 +236,7 @@ void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsig regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr, 0); + force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr); } void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) @@ -321,7 +320,7 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un if (is_no_fault_exception(regs)) return; - force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar, 0); + force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar); out: exception_exit(prev_state); } @@ -385,13 +384,13 @@ void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsig */ switch (type) { case HV_FAULT_TYPE_INV_ASI: - force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr, 0); + force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr); break; case HV_FAULT_TYPE_MCD_DIS: - force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr, 0); + force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr); break; default: - force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr, 0); + force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr); break; } } @@ -568,7 +567,7 @@ static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned lon regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0, 0); + force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0); } void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar) @@ -2069,8 +2068,7 @@ void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent) /* Send SIGSEGV to the userspace process with the right signal * code */ - force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr, - 0); + force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr); } /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate. @@ -2184,7 +2182,7 @@ bool sun4v_nonresum_error_user_handled(struct pt_regs *regs, } if (attrs & SUN4V_ERR_ATTRS_PIO) { force_sig_fault(SIGBUS, BUS_ADRERR, - (void __user *)sun4v_get_vaddr(regs), 0); + (void __user *)sun4v_get_vaddr(regs)); return true; } @@ -2340,8 +2338,7 @@ static void do_fpe_common(struct pt_regs *regs) else if (fsr & 0x01) code = FPE_FLTRES; } - force_sig_fault(SIGFPE, code, - (void __user *)regs->tpc, 0); + force_sig_fault(SIGFPE, code, (void __user *)regs->tpc); } } @@ -2395,8 +2392,7 @@ void do_tof(struct pt_regs *regs) regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGEMT, EMT_TAGOVF, - (void __user *)regs->tpc, 0); + force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc); out: exception_exit(prev_state); } @@ -2415,8 +2411,7 @@ void do_div0(struct pt_regs *regs) regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGFPE, FPE_INTDIV, - (void __user *)regs->tpc, 0); + force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc); out: exception_exit(prev_state); } @@ -2612,7 +2607,7 @@ void do_illegal_instruction(struct pt_regs *regs) } } } - force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, 0); + force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc); out: exception_exit(prev_state); } @@ -2632,7 +2627,7 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo if (is_no_fault_exception(regs)) return; - force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar, 0); + force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar); out: exception_exit(prev_state); } @@ -2650,7 +2645,7 @@ void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_c if (is_no_fault_exception(regs)) return; - force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr, 0); + force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr); } /* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI @@ -2697,7 +2692,7 @@ void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr, regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr, 0); + force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr); } void do_privop(struct pt_regs *regs) @@ -2712,8 +2707,7 @@ void do_privop(struct pt_regs *regs) regs->tpc &= 0xffffffff; regs->tnpc &= 0xffffffff; } - force_sig_fault(SIGILL, ILL_PRVOPC, - (void __user *)regs->tpc, 0); + force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc); out: exception_exit(prev_state); } diff --git a/arch/sparc/kernel/unaligned_32.c b/arch/sparc/kernel/unaligned_32.c index ef5c5207c9ff..455f0258c745 100644 --- a/arch/sparc/kernel/unaligned_32.c +++ b/arch/sparc/kernel/unaligned_32.c @@ -278,5 +278,5 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn) { send_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)safe_compute_effective_address(regs, insn), - 0, current); + current); } diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c index de2031c2b2d7..fa858626b85b 100644 --- a/arch/sparc/mm/fault_32.c +++ b/arch/sparc/mm/fault_32.c @@ -83,7 +83,7 @@ static void __do_fault_siginfo(int code, int sig, struct pt_regs *regs, show_signal_msg(regs, sig, code, addr, current); - force_sig_fault(sig, code, (void __user *) addr, 0); + force_sig_fault(sig, code, (void __user *) addr); } static unsigned long compute_si_addr(struct pt_regs *regs, int text_fault) diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c index 0a6bcc85fba7..9a9652a15fed 100644 --- a/arch/sparc/mm/fault_64.c +++ b/arch/sparc/mm/fault_64.c @@ -176,7 +176,7 @@ static void do_fault_siginfo(int code, int sig, struct pt_regs *regs, if (unlikely(show_unhandled_signals)) show_signal_msg(regs, sig, code, addr, current); - force_sig_fault(sig, code, (void __user *) addr, 0); + force_sig_fault(sig, code, (void __user *) addr); } static unsigned int get_fault_insn(struct pt_regs *regs, unsigned int insn) diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h index b9126fe06c3f..99a9ab2b169a 100644 --- a/include/linux/sched/signal.h +++ b/include/linux/sched/signal.h @@ -329,6 +329,7 @@ int force_sig_pkuerr(void __user *addr, u32 pkey); int force_sig_perf(void __user *addr, u32 type, u64 sig_data); int force_sig_ptrace_errno_trap(int errno, void __user *addr); +int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno); extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *); extern void force_sigsegv(int sig); diff --git a/kernel/signal.c b/kernel/signal.c index a3229add4455..87a374225277 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1808,6 +1808,22 @@ int force_sig_ptrace_errno_trap(int errno, void __user *addr) return force_sig_info(&info); } +/* For the rare architectures that include trap information using + * si_trapno. + */ +int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno) +{ + struct kernel_siginfo info; + + clear_siginfo(&info); + info.si_signo = sig; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + info.si_trapno = trapno; + return force_sig_info(&info); +} + int kill_pgrp(struct pid *pid, int sig, int priv) { int ret; @@ -3243,6 +3259,9 @@ enum siginfo_layout siginfo_layout(unsigned sig, int si_code) #endif else if ((sig == SIGTRAP) && (si_code == TRAP_PERF)) layout = SIL_PERF_EVENT; + else if (IS_ENABLED(CONFIG_SPARC) && + (sig == SIGILL) && (si_code == ILL_ILLTRP)) + layout = SIL_FAULT_TRAPNO; #ifdef __ARCH_SI_TRAPNO else if (layout == SIL_FAULT) layout = SIL_FAULT_TRAPNO;