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-rw-r--r--arch/arm64/include/asm/system_misc.h3
-rw-r--r--arch/arm64/include/asm/traps.h5
-rw-r--r--arch/arm64/include/uapi/asm/Kbuild1
-rw-r--r--arch/arm64/include/uapi/asm/siginfo.h24
-rw-r--r--arch/arm64/kernel/debug-monitors.c11
-rw-r--r--arch/arm64/kernel/fpsimd.c10
-rw-r--r--arch/arm64/kernel/ptrace.c16
-rw-r--r--arch/arm64/kernel/sys_compat.c13
-rw-r--r--arch/arm64/kernel/traps.c67
-rw-r--r--arch/arm64/mm/fault.c94
10 files changed, 91 insertions, 153 deletions
diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h
index 28893a0b141d..0e2a0ecaf484 100644
--- a/arch/arm64/include/asm/system_misc.h
+++ b/arch/arm64/include/asm/system_misc.h
@@ -33,7 +33,8 @@ void die(const char *msg, struct pt_regs *regs, int err);
struct siginfo;
void arm64_notify_die(const char *str, struct pt_regs *regs,
- struct siginfo *info, int err);
+ int signo, int sicode, void __user *addr,
+ int err);
void hook_debug_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),
diff --git a/arch/arm64/include/asm/traps.h b/arch/arm64/include/asm/traps.h
index c320f3bf6c57..f9c1aa6167d2 100644
--- a/arch/arm64/include/asm/traps.h
+++ b/arch/arm64/include/asm/traps.h
@@ -37,8 +37,9 @@ void register_undef_hook(struct undef_hook *hook);
void unregister_undef_hook(struct undef_hook *hook);
void force_signal_inject(int signal, int code, unsigned long address);
void arm64_notify_segfault(unsigned long addr);
-void arm64_force_sig_info(struct siginfo *info, const char *str,
- struct task_struct *tsk);
+void arm64_force_sig_fault(int signo, int code, void __user *addr, const char *str);
+void arm64_force_sig_mceerr(int code, void __user *addr, short lsb, const char *str);
+void arm64_force_sig_ptrace_errno_trap(int errno, void __user *addr, const char *str);
/*
* Move regs->pc to next instruction and do necessary setup before it
diff --git a/arch/arm64/include/uapi/asm/Kbuild b/arch/arm64/include/uapi/asm/Kbuild
index 198afbf0688f..6c5adf458690 100644
--- a/arch/arm64/include/uapi/asm/Kbuild
+++ b/arch/arm64/include/uapi/asm/Kbuild
@@ -19,3 +19,4 @@ generic-y += swab.h
generic-y += termbits.h
generic-y += termios.h
generic-y += types.h
+generic-y += siginfo.h
diff --git a/arch/arm64/include/uapi/asm/siginfo.h b/arch/arm64/include/uapi/asm/siginfo.h
deleted file mode 100644
index 574d12f86039..000000000000
--- a/arch/arm64/include/uapi/asm/siginfo.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * Copyright (C) 2012 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef __ASM_SIGINFO_H
-#define __ASM_SIGINFO_H
-
-#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
-
-#include <asm-generic/siginfo.h>
-
-#endif
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 06ca574495af..d7bb6aefae0a 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -210,13 +210,6 @@ NOKPROBE_SYMBOL(call_step_hook);
static void send_user_sigtrap(int si_code)
{
struct pt_regs *regs = current_pt_regs();
- siginfo_t info;
-
- clear_siginfo(&info);
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = si_code;
- info.si_addr = (void __user *)instruction_pointer(regs);
if (WARN_ON(!user_mode(regs)))
return;
@@ -224,7 +217,9 @@ static void send_user_sigtrap(int si_code)
if (interrupts_enabled(regs))
local_irq_enable();
- arm64_force_sig_info(&info, "User debug trap", current);
+ arm64_force_sig_fault(SIGTRAP, si_code,
+ (void __user *)instruction_pointer(regs),
+ "User debug trap");
}
static int single_step_handler(unsigned long addr, unsigned int esr,
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 58c53bc96928..5ebe73b69961 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -842,7 +842,6 @@ asmlinkage void do_fpsimd_acc(unsigned int esr, struct pt_regs *regs)
*/
asmlinkage void do_fpsimd_exc(unsigned int esr, struct pt_regs *regs)
{
- siginfo_t info;
unsigned int si_code = FPE_FLTUNK;
if (esr & ESR_ELx_FP_EXC_TFV) {
@@ -858,12 +857,9 @@ asmlinkage void do_fpsimd_exc(unsigned int esr, struct pt_regs *regs)
si_code = FPE_FLTRES;
}
- clear_siginfo(&info);
- info.si_signo = SIGFPE;
- info.si_code = si_code;
- info.si_addr = (void __user *)instruction_pointer(regs);
-
- send_sig_info(SIGFPE, &info, current);
+ send_sig_fault(SIGFPE, si_code,
+ (void __user *)instruction_pointer(regs),
+ current);
}
void fpsimd_thread_switch(struct task_struct *next)
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 6219486fa25f..1710a2d01669 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -182,13 +182,7 @@ static void ptrace_hbptriggered(struct perf_event *bp,
struct pt_regs *regs)
{
struct arch_hw_breakpoint *bkpt = counter_arch_bp(bp);
- siginfo_t info;
-
- clear_siginfo(&info);
- info.si_signo = SIGTRAP;
- info.si_errno = 0;
- info.si_code = TRAP_HWBKPT;
- info.si_addr = (void __user *)(bkpt->trigger);
+ const char *desc = "Hardware breakpoint trap (ptrace)";
#ifdef CONFIG_COMPAT
if (is_compat_task()) {
@@ -208,10 +202,14 @@ static void ptrace_hbptriggered(struct perf_event *bp,
break;
}
}
- force_sig_ptrace_errno_trap(si_errno, (void __user *)bkpt->trigger);
+ arm64_force_sig_ptrace_errno_trap(si_errno,
+ (void __user *)bkpt->trigger,
+ desc);
}
#endif
- arm64_force_sig_info(&info, "Hardware breakpoint trap (ptrace)", current);
+ arm64_force_sig_fault(SIGTRAP, TRAP_HWBKPT,
+ (void __user *)(bkpt->trigger),
+ desc);
}
/*
diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c
index a6109825eeb9..32653d156747 100644
--- a/arch/arm64/kernel/sys_compat.c
+++ b/arch/arm64/kernel/sys_compat.c
@@ -68,8 +68,8 @@ do_compat_cache_op(unsigned long start, unsigned long end, int flags)
*/
long compat_arm_syscall(struct pt_regs *regs)
{
- siginfo_t info;
unsigned int no = regs->regs[7];
+ void __user *addr;
switch (no) {
/*
@@ -112,13 +112,10 @@ long compat_arm_syscall(struct pt_regs *regs)
break;
}
- clear_siginfo(&info);
- info.si_signo = SIGILL;
- info.si_errno = 0;
- info.si_code = ILL_ILLTRP;
- info.si_addr = (void __user *)instruction_pointer(regs) -
- (compat_thumb_mode(regs) ? 2 : 4);
+ addr = (void __user *)instruction_pointer(regs) -
+ (compat_thumb_mode(regs) ? 2 : 4);
- arm64_notify_die("Oops - bad compat syscall(2)", regs, &info, no);
+ arm64_notify_die("Oops - bad compat syscall(2)", regs,
+ SIGILL, ILL_ILLTRP, addr, no);
return 0;
}
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 4066da7f1e5e..5f4d9acb32f5 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -224,24 +224,19 @@ void die(const char *str, struct pt_regs *regs, int err)
do_exit(SIGSEGV);
}
-static bool show_unhandled_signals_ratelimited(void)
+static void arm64_show_signal(int signo, const char *str)
{
static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
- return show_unhandled_signals && __ratelimit(&rs);
-}
-
-void arm64_force_sig_info(struct siginfo *info, const char *str,
- struct task_struct *tsk)
-{
+ struct task_struct *tsk = current;
unsigned int esr = tsk->thread.fault_code;
struct pt_regs *regs = task_pt_regs(tsk);
- if (!unhandled_signal(tsk, info->si_signo))
- goto send_sig;
-
- if (!show_unhandled_signals_ratelimited())
- goto send_sig;
+ /* Leave if the signal won't be shown */
+ if (!show_unhandled_signals ||
+ !unhandled_signal(tsk, signo) ||
+ !__ratelimit(&rs))
+ return;
pr_info("%s[%d]: unhandled exception: ", tsk->comm, task_pid_nr(tsk));
if (esr)
@@ -251,19 +246,39 @@ void arm64_force_sig_info(struct siginfo *info, const char *str,
print_vma_addr(KERN_CONT " in ", regs->pc);
pr_cont("\n");
__show_regs(regs);
+}
+
+void arm64_force_sig_fault(int signo, int code, void __user *addr,
+ const char *str)
+{
+ arm64_show_signal(signo, str);
+ force_sig_fault(signo, code, addr, current);
+}
-send_sig:
- force_sig_info(info->si_signo, info, tsk);
+void arm64_force_sig_mceerr(int code, void __user *addr, short lsb,
+ const char *str)
+{
+ arm64_show_signal(SIGBUS, str);
+ force_sig_mceerr(code, addr, lsb, current);
+}
+
+void arm64_force_sig_ptrace_errno_trap(int errno, void __user *addr,
+ const char *str)
+{
+ arm64_show_signal(SIGTRAP, str);
+ force_sig_ptrace_errno_trap(errno, addr);
}
void arm64_notify_die(const char *str, struct pt_regs *regs,
- struct siginfo *info, int err)
+ int signo, int sicode, void __user *addr,
+ int err)
{
if (user_mode(regs)) {
WARN_ON(regs != current_pt_regs());
current->thread.fault_address = 0;
current->thread.fault_code = err;
- arm64_force_sig_info(info, str, current);
+
+ arm64_force_sig_fault(signo, sicode, addr, str);
} else {
die(str, regs, err);
}
@@ -350,15 +365,12 @@ exit:
void force_signal_inject(int signal, int code, unsigned long address)
{
- siginfo_t info;
const char *desc;
struct pt_regs *regs = current_pt_regs();
if (WARN_ON(!user_mode(regs)))
return;
- clear_siginfo(&info);
-
switch (signal) {
case SIGILL:
desc = "undefined instruction";
@@ -377,12 +389,7 @@ void force_signal_inject(int signal, int code, unsigned long address)
signal = SIGKILL;
}
- info.si_signo = signal;
- info.si_errno = 0;
- info.si_code = code;
- info.si_addr = (void __user *)address;
-
- arm64_notify_die(desc, regs, &info, 0);
+ arm64_notify_die(desc, regs, signal, code, (void __user *)address, 0);
}
/*
@@ -799,19 +806,13 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr)
*/
asmlinkage void bad_el0_sync(struct pt_regs *regs, int reason, unsigned int esr)
{
- siginfo_t info;
void __user *pc = (void __user *)instruction_pointer(regs);
- clear_siginfo(&info);
- info.si_signo = SIGILL;
- info.si_errno = 0;
- info.si_code = ILL_ILLOPC;
- info.si_addr = pc;
-
current->thread.fault_address = 0;
current->thread.fault_code = esr;
- arm64_force_sig_info(&info, "Bad EL0 synchronous exception", current);
+ arm64_force_sig_fault(SIGILL, ILL_ILLOPC, pc,
+ "Bad EL0 synchronous exception");
}
#ifdef CONFIG_VMAP_STACK
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index d0e638ef3af6..7d9571f4ae3d 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -303,9 +303,9 @@ static void __do_kernel_fault(unsigned long addr, unsigned int esr,
die_kernel_fault(msg, addr, esr, regs);
}
-static void __do_user_fault(struct siginfo *info, unsigned int esr)
+static void set_thread_esr(unsigned long address, unsigned int esr)
{
- current->thread.fault_address = (unsigned long)info->si_addr;
+ current->thread.fault_address = address;
/*
* If the faulting address is in the kernel, we must sanitize the ESR.
@@ -358,7 +358,6 @@ static void __do_user_fault(struct siginfo *info, unsigned int esr)
}
current->thread.fault_code = esr;
- arm64_force_sig_info(info, esr_to_fault_info(esr)->name, current);
}
static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *regs)
@@ -369,14 +368,10 @@ static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *re
*/
if (user_mode(regs)) {
const struct fault_info *inf = esr_to_fault_info(esr);
- struct siginfo si;
- clear_siginfo(&si);
- si.si_signo = inf->sig;
- si.si_code = inf->code;
- si.si_addr = (void __user *)addr;
-
- __do_user_fault(&si, esr);
+ set_thread_esr(addr, esr);
+ arm64_force_sig_fault(inf->sig, inf->code, (void __user *)addr,
+ inf->name);
} else {
__do_kernel_fault(addr, esr, regs);
}
@@ -430,9 +425,9 @@ static bool is_el0_instruction_abort(unsigned int esr)
static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
+ const struct fault_info *inf;
struct task_struct *tsk;
struct mm_struct *mm;
- struct siginfo si;
vm_fault_t fault, major = 0;
unsigned long vm_flags = VM_READ | VM_WRITE;
unsigned int mm_flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
@@ -568,37 +563,35 @@ retry:
return 0;
}
- clear_siginfo(&si);
- si.si_addr = (void __user *)addr;
-
+ inf = esr_to_fault_info(esr);
+ set_thread_esr(addr, esr);
if (fault & VM_FAULT_SIGBUS) {
/*
* We had some memory, but were unable to successfully fix up
* this page fault.
*/
- si.si_signo = SIGBUS;
- si.si_code = BUS_ADRERR;
- } else if (fault & VM_FAULT_HWPOISON_LARGE) {
- unsigned int hindex = VM_FAULT_GET_HINDEX(fault);
-
- si.si_signo = SIGBUS;
- si.si_code = BUS_MCEERR_AR;
- si.si_addr_lsb = hstate_index_to_shift(hindex);
- } else if (fault & VM_FAULT_HWPOISON) {
- si.si_signo = SIGBUS;
- si.si_code = BUS_MCEERR_AR;
- si.si_addr_lsb = PAGE_SHIFT;
+ arm64_force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)addr,
+ inf->name);
+ } else if (fault & (VM_FAULT_HWPOISON_LARGE | VM_FAULT_HWPOISON)) {
+ unsigned int lsb;
+
+ lsb = PAGE_SHIFT;
+ if (fault & VM_FAULT_HWPOISON_LARGE)
+ lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault));
+
+ arm64_force_sig_mceerr(BUS_MCEERR_AR, (void __user *)addr, lsb,
+ inf->name);
} else {
/*
* Something tried to access memory that isn't in our memory
* map.
*/
- si.si_signo = SIGSEGV;
- si.si_code = fault == VM_FAULT_BADACCESS ?
- SEGV_ACCERR : SEGV_MAPERR;
+ arm64_force_sig_fault(SIGSEGV,
+ fault == VM_FAULT_BADACCESS ? SEGV_ACCERR : SEGV_MAPERR,
+ (void __user *)addr,
+ inf->name);
}
- __do_user_fault(&si, esr);
return 0;
no_context:
@@ -631,8 +624,8 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs)
static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
{
- struct siginfo info;
const struct fault_info *inf;
+ void __user *siaddr;
inf = esr_to_fault_info(esr);
@@ -651,15 +644,11 @@ static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
nmi_exit();
}
- clear_siginfo(&info);
- info.si_signo = inf->sig;
- info.si_errno = 0;
- info.si_code = inf->code;
if (esr & ESR_ELx_FnV)
- info.si_addr = NULL;
+ siaddr = NULL;
else
- info.si_addr = (void __user *)addr;
- arm64_notify_die(inf->name, regs, &info, esr);
+ siaddr = (void __user *)addr;
+ arm64_notify_die(inf->name, regs, inf->sig, inf->code, siaddr, esr);
return 0;
}
@@ -740,7 +729,6 @@ asmlinkage void __exception do_mem_abort(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
const struct fault_info *inf = esr_to_fault_info(esr);
- struct siginfo info;
if (!inf->fn(addr, esr, regs))
return;
@@ -751,12 +739,8 @@ asmlinkage void __exception do_mem_abort(unsigned long addr, unsigned int esr,
show_pte(addr);
}
- clear_siginfo(&info);
- info.si_signo = inf->sig;
- info.si_errno = 0;
- info.si_code = inf->code;
- info.si_addr = (void __user *)addr;
- arm64_notify_die(inf->name, regs, &info, esr);
+ arm64_notify_die(inf->name, regs,
+ inf->sig, inf->code, (void __user *)addr, esr);
}
asmlinkage void __exception do_el0_irq_bp_hardening(void)
@@ -786,20 +770,14 @@ asmlinkage void __exception do_sp_pc_abort(unsigned long addr,
unsigned int esr,
struct pt_regs *regs)
{
- struct siginfo info;
-
if (user_mode(regs)) {
if (instruction_pointer(regs) > TASK_SIZE)
arm64_apply_bp_hardening();
local_daif_restore(DAIF_PROCCTX);
}
- clear_siginfo(&info);
- info.si_signo = SIGBUS;
- info.si_errno = 0;
- info.si_code = BUS_ADRALN;
- info.si_addr = (void __user *)addr;
- arm64_notify_die("SP/PC alignment exception", regs, &info, esr);
+ arm64_notify_die("SP/PC alignment exception", regs,
+ SIGBUS, BUS_ADRALN, (void __user *)addr, esr);
}
int __init early_brk64(unsigned long addr, unsigned int esr,
@@ -853,14 +831,8 @@ asmlinkage int __exception do_debug_exception(unsigned long addr,
if (!inf->fn(addr, esr, regs)) {
rv = 1;
} else {
- struct siginfo info;
-
- clear_siginfo(&info);
- info.si_signo = inf->sig;
- info.si_errno = 0;
- info.si_code = inf->code;
- info.si_addr = (void __user *)addr;
- arm64_notify_die(inf->name, regs, &info, esr);
+ arm64_notify_die(inf->name, regs,
+ inf->sig, inf->code, (void __user *)addr, esr);
rv = 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 23:14:06 +0000