Lines Matching refs:sig
67 static void __user *sig_handler(struct task_struct *t, int sig) in sig_handler() argument
69 return t->sighand->action[sig - 1].sa.sa_handler; in sig_handler()
72 static inline bool sig_handler_ignored(void __user *handler, int sig) in sig_handler_ignored() argument
76 (handler == SIG_DFL && sig_kernel_ignore(sig)); in sig_handler_ignored()
79 static bool sig_task_ignored(struct task_struct *t, int sig, bool force) in sig_task_ignored() argument
83 handler = sig_handler(t, sig); in sig_task_ignored()
86 if (unlikely(is_global_init(t) && sig_kernel_only(sig))) in sig_task_ignored()
90 handler == SIG_DFL && !(force && sig_kernel_only(sig))) in sig_task_ignored()
98 return sig_handler_ignored(handler, sig); in sig_task_ignored()
101 static bool sig_ignored(struct task_struct *t, int sig, bool force) in sig_ignored() argument
108 if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig)) in sig_ignored()
116 if (t->ptrace && sig != SIGKILL) in sig_ignored()
119 return sig_task_ignored(t, sig, force); in sig_ignored()
134 ready |= signal->sig[i] &~ blocked->sig[i]; in has_pending_signals()
137 case 4: ready = signal->sig[3] &~ blocked->sig[3]; in has_pending_signals()
138 ready |= signal->sig[2] &~ blocked->sig[2]; in has_pending_signals()
139 ready |= signal->sig[1] &~ blocked->sig[1]; in has_pending_signals()
140 ready |= signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
143 case 2: ready = signal->sig[1] &~ blocked->sig[1]; in has_pending_signals()
144 ready |= signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
147 case 1: ready = signal->sig[0] &~ blocked->sig[0]; in has_pending_signals()
210 int sig = 0; in next_signal() local
212 s = pending->signal.sig; in next_signal()
213 m = mask->sig; in next_signal()
223 sig = ffz(~x) + 1; in next_signal()
224 return sig; in next_signal()
233 sig = ffz(~x) + i*_NSIG_BPW + 1; in next_signal()
242 sig = ffz(~x) + _NSIG_BPW + 1; in next_signal()
250 return sig; in next_signal()
253 static inline void print_dropped_signal(int sig) in print_dropped_signal() argument
264 current->comm, current->pid, sig); in print_dropped_signal()
367 struct signal_struct *sig = task->signal; in task_participate_group_stop() local
377 if (!WARN_ON_ONCE(sig->group_stop_count == 0)) in task_participate_group_stop()
378 sig->group_stop_count--; in task_participate_group_stop()
384 if (!sig->group_stop_count && !(sig->flags & SIGNAL_STOP_STOPPED)) { in task_participate_group_stop()
385 signal_set_stop_flags(sig, SIGNAL_STOP_STOPPED); in task_participate_group_stop()
394 struct signal_struct *sig = current->signal; in task_join_group_stop() local
396 if (sig->group_stop_count) { in task_join_group_stop()
397 sig->group_stop_count++; in task_join_group_stop()
399 } else if (!(sig->flags & SIGNAL_STOP_STOPPED)) in task_join_group_stop()
412 __sigqueue_alloc(int sig, struct task_struct *t, gfp_t gfp_flags, in __sigqueue_alloc() argument
437 print_dropped_signal(sig); in __sigqueue_alloc()
498 int sig = q->info.si_signo; in __flush_itimer_signals() local
501 sigaddset(&retain, sig); in __flush_itimer_signals()
503 sigdelset(&signal, sig); in __flush_itimer_signals()
555 bool unhandled_signal(struct task_struct *tsk, int sig) in unhandled_signal() argument
557 void __user *handler = tsk->sighand->action[sig-1].sa.sa_handler; in unhandled_signal()
568 static void collect_signal(int sig, struct sigpending *list, kernel_siginfo_t *info, in collect_signal() argument
578 if (q->info.si_signo == sig) { in collect_signal()
585 sigdelset(&list->signal, sig); in collect_signal()
605 info->si_signo = sig; in collect_signal()
616 int sig = next_signal(pending, mask); in __dequeue_signal() local
618 if (sig) in __dequeue_signal()
619 collect_signal(sig, pending, info, resched_timer); in __dequeue_signal()
620 return sig; in __dequeue_signal()
716 if (!((pending->signal.sig[0] & ~tsk->blocked.sig[0]) & SYNCHRONOUS_MASK)) in dequeue_synchronous_signal()
828 static int check_kill_permission(int sig, struct kernel_siginfo *info, in check_kill_permission() argument
834 if (!valid_signal(sig)) in check_kill_permission()
840 error = audit_signal_info(sig, t); /* Let audit system see the signal */ in check_kill_permission()
846 switch (sig) { in check_kill_permission()
861 return security_task_kill(t, info, sig, NULL); in check_kill_permission()
900 static bool prepare_signal(int sig, struct task_struct *p, bool force) in prepare_signal() argument
908 return sig == SIGKILL; in prepare_signal()
912 } else if (sig_kernel_stop(sig)) { in prepare_signal()
920 } else if (sig == SIGCONT) { in prepare_signal()
962 return !sig_ignored(p, sig, force); in prepare_signal()
973 static inline bool wants_signal(int sig, struct task_struct *p) in wants_signal() argument
975 if (sigismember(&p->blocked, sig)) in wants_signal()
981 if (sig == SIGKILL) in wants_signal()
990 static void complete_signal(int sig, struct task_struct *p, enum pid_type type) in complete_signal() argument
1001 if (wants_signal(sig, p)) in complete_signal()
1014 while (!wants_signal(sig, t)) { in complete_signal()
1031 if (sig_fatal(p, sig) && in complete_signal()
1033 !sigismember(&t->real_blocked, sig) && in complete_signal()
1034 (sig == SIGKILL || !p->ptrace)) { in complete_signal()
1038 if (!sig_kernel_coredump(sig)) { in complete_signal()
1046 signal->group_exit_code = sig; in complete_signal()
1062 signal_wake_up(t, sig == SIGKILL); in complete_signal()
1066 static inline bool legacy_queue(struct sigpending *signals, int sig) in legacy_queue() argument
1068 return (sig < SIGRTMIN) && sigismember(&signals->signal, sig); in legacy_queue()
1071 static int __send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, in __send_signal() argument
1082 if (!prepare_signal(sig, t, force)) in __send_signal()
1092 if (legacy_queue(pending, sig)) in __send_signal()
1099 if ((sig == SIGKILL) || (t->flags & PF_KTHREAD)) in __send_signal()
1111 if (sig < SIGRTMIN) in __send_signal()
1116 q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit, 0); in __send_signal()
1123 q->info.si_signo = sig; in __send_signal()
1136 q->info.si_signo = sig; in __send_signal()
1147 sig >= SIGRTMIN && info->si_code != SI_USER) { in __send_signal()
1165 signalfd_notify(t, sig); in __send_signal()
1166 sigaddset(&pending->signal, sig); in __send_signal()
1174 if (sig == SIGCONT) in __send_signal()
1176 else if (sig_kernel_stop(sig)) in __send_signal()
1178 sigaddset(signal, sig); in __send_signal()
1182 complete_signal(sig, t, type); in __send_signal()
1184 trace_signal_generate(sig, info, t, type != PIDTYPE_PID, result); in __send_signal()
1212 static int send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, in send_signal() argument
1245 return __send_signal(sig, info, t, type, force); in send_signal()
1282 __group_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) in __group_send_sig_info() argument
1284 return send_signal(sig, info, p, PIDTYPE_TGID); in __group_send_sig_info()
1287 int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p, in do_send_sig_info() argument
1294 ret = send_signal(sig, info, p, type); in do_send_sig_info()
1325 int sig = info->si_signo; in force_sig_info_to_task() local
1328 action = &t->sighand->action[sig-1]; in force_sig_info_to_task()
1330 blocked = sigismember(&t->blocked, sig); in force_sig_info_to_task()
1336 sigdelset(&t->blocked, sig); in force_sig_info_to_task()
1346 ret = send_signal(sig, info, t, PIDTYPE_PID); in force_sig_info_to_task()
1431 int group_send_sig_info(int sig, struct kernel_siginfo *info, in group_send_sig_info() argument
1437 ret = check_kill_permission(sig, info, p); in group_send_sig_info()
1440 if (!ret && sig) in group_send_sig_info()
1441 ret = do_send_sig_info(sig, info, p, type); in group_send_sig_info()
1451 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp) in __kill_pgrp_info() argument
1459 int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID); in __kill_pgrp_info()
1466 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid) in kill_pid_info() argument
1475 error = group_send_sig_info(sig, info, p, PIDTYPE_TGID); in kill_pid_info()
1488 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_proc_info() argument
1492 error = kill_pid_info(sig, info, find_vpid(pid)); in kill_proc_info()
1533 int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, in kill_pid_usb_asyncio() argument
1541 if (!valid_signal(sig)) in kill_pid_usb_asyncio()
1545 info.si_signo = sig; in kill_pid_usb_asyncio()
1560 ret = security_task_kill(p, &info, sig, cred); in kill_pid_usb_asyncio()
1564 if (sig) { in kill_pid_usb_asyncio()
1566 ret = __send_signal(sig, &info, p, PIDTYPE_TGID, false); in kill_pid_usb_asyncio()
1584 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_something_info() argument
1589 return kill_proc_info(sig, info, pid); in kill_something_info()
1597 ret = __kill_pgrp_info(sig, info, in kill_something_info()
1606 int err = group_send_sig_info(sig, info, p, in kill_something_info()
1624 int send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) in send_sig_info() argument
1630 if (!valid_signal(sig)) in send_sig_info()
1633 return do_send_sig_info(sig, info, p, PIDTYPE_PID); in send_sig_info()
1641 send_sig(int sig, struct task_struct *p, int priv) in send_sig() argument
1643 return send_sig_info(sig, __si_special(priv), p); in send_sig()
1647 void force_sig(int sig) in force_sig() argument
1652 info.si_signo = sig; in force_sig()
1661 void force_fatal_sig(int sig) in force_fatal_sig() argument
1666 info.si_signo = sig; in force_fatal_sig()
1674 void force_exit_sig(int sig) in force_exit_sig() argument
1679 info.si_signo = sig; in force_exit_sig()
1693 void force_sigsegv(int sig) in force_sigsegv() argument
1695 if (sig == SIGSEGV) in force_sigsegv()
1701 int force_sig_fault_to_task(int sig, int code, void __user *addr in force_sig_fault_to_task() argument
1708 info.si_signo = sig; in force_sig_fault_to_task()
1720 int force_sig_fault(int sig, int code, void __user *addr in force_sig_fault() argument
1723 return force_sig_fault_to_task(sig, code, addr in force_sig_fault()
1727 int send_sig_fault(int sig, int code, void __user *addr in send_sig_fault() argument
1734 info.si_signo = sig; in send_sig_fault()
1859 int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno) in force_sig_fault_trapno() argument
1864 info.si_signo = sig; in force_sig_fault_trapno()
1875 int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno, in send_sig_fault_trapno() argument
1881 info.si_signo = sig; in send_sig_fault_trapno()
1889 int kill_pgrp(struct pid *pid, int sig, int priv) in kill_pgrp() argument
1894 ret = __kill_pgrp_info(sig, __si_special(priv), pid); in kill_pgrp()
1901 int kill_pid(struct pid *pid, int sig, int priv) in kill_pid() argument
1903 return kill_pid_info(sig, __si_special(priv), pid); in kill_pid()
1948 int sig = q->info.si_signo; in send_sigqueue() local
1964 if (!prepare_signal(sig, t, false)) in send_sigqueue()
1980 signalfd_notify(t, sig); in send_sigqueue()
1983 sigaddset(&pending->signal, sig); in send_sigqueue()
1984 complete_signal(sig, t, type); in send_sigqueue()
1987 trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result); in send_sigqueue()
2010 bool do_notify_parent(struct task_struct *tsk, int sig) in do_notify_parent() argument
2018 BUG_ON(sig == -1); in do_notify_parent()
2029 if (sig != SIGCHLD) { in do_notify_parent()
2035 sig = SIGCHLD; in do_notify_parent()
2039 info.si_signo = sig; in do_notify_parent()
2074 if (!tsk->ptrace && sig == SIGCHLD && in do_notify_parent()
2094 sig = 0; in do_notify_parent()
2100 if (valid_signal(sig) && sig) in do_notify_parent()
2101 __send_signal(sig, &info, tsk->parent, PIDTYPE_TGID, false); in do_notify_parent()
2376 struct signal_struct *sig = current->signal; in do_signal_stop() local
2386 unlikely(signal_group_exit(sig))) in do_signal_stop()
2407 if (!(sig->flags & SIGNAL_STOP_STOPPED)) in do_signal_stop()
2408 sig->group_exit_code = signr; in do_signal_stop()
2410 sig->group_stop_count = 0; in do_signal_stop()
2413 sig->group_stop_count++; in do_signal_stop()
2424 sig->group_stop_count++; in do_signal_stop()
2597 switch (siginfo_layout(ksig->sig, ksig->info.si_code)) { in hide_si_addr_tag_bits()
2605 ksig->info.si_addr, ksig->sig, ksig->info.si_code); in hide_si_addr_tag_bits()
2857 ksig->sig = signr; in get_signal()
2862 return ksig->sig > 0; in get_signal()
2887 sigaddset(&blocked, ksig->sig); in signal_delivered()
2897 force_sigsegv(ksig->sig); in signal_setup_done()
3252 static bool known_siginfo_layout(unsigned sig, int si_code) in known_siginfo_layout() argument
3257 if (sig_specific_sicodes(sig)) { in known_siginfo_layout()
3258 if (si_code <= sig_sicodes[sig].limit) in known_siginfo_layout()
3271 enum siginfo_layout siginfo_layout(unsigned sig, int si_code) in siginfo_layout() argument
3275 if ((sig < ARRAY_SIZE(sig_sicodes)) && in siginfo_layout()
3276 (si_code <= sig_sicodes[sig].limit)) { in siginfo_layout()
3277 layout = sig_sicodes[sig].layout; in siginfo_layout()
3279 if ((sig == SIGBUS) && in siginfo_layout()
3282 else if ((sig == SIGSEGV) && (si_code == SEGV_BNDERR)) in siginfo_layout()
3285 else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR)) in siginfo_layout()
3288 else if ((sig == SIGTRAP) && (si_code == TRAP_PERF)) in siginfo_layout()
3291 (sig == SIGILL) && (si_code == ILL_ILLTRP)) in siginfo_layout()
3294 ((sig == SIGFPE) || in siginfo_layout()
3295 ((sig == SIGTRAP) && (si_code == TRAP_UNK)))) in siginfo_layout()
3565 int sig, ret = 0; in do_sigtimedwait() local
3581 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3582 if (!sig && timeout) { in do_sigtimedwait()
3600 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3604 if (sig) in do_sigtimedwait()
3605 return sig; in do_sigtimedwait()
3746 static inline void prepare_kill_siginfo(int sig, struct kernel_siginfo *info) in prepare_kill_siginfo() argument
3749 info->si_signo = sig; in prepare_kill_siginfo()
3761 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3765 prepare_kill_siginfo(sig, &info); in SYSCALL_DEFINE2()
3767 return kill_something_info(sig, &info, pid); in SYSCALL_DEFINE2()
3836 SYSCALL_DEFINE4(pidfd_send_signal, int, pidfd, int, sig, in SYSCALL_DEFINE4() argument
3869 if (unlikely(sig != kinfo.si_signo)) in SYSCALL_DEFINE4()
3878 prepare_kill_siginfo(sig, &kinfo); in SYSCALL_DEFINE4()
3881 ret = kill_pid_info(sig, &kinfo, pid); in SYSCALL_DEFINE4()
3889 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info) in do_send_specific() argument
3897 error = check_kill_permission(sig, info, p); in do_send_specific()
3902 if (!error && sig) { in do_send_specific()
3903 error = do_send_sig_info(sig, info, p, PIDTYPE_PID); in do_send_specific()
3918 static int do_tkill(pid_t tgid, pid_t pid, int sig) in do_tkill() argument
3923 info.si_signo = sig; in do_tkill()
3929 return do_send_specific(tgid, pid, sig, &info); in do_tkill()
3942 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) in SYSCALL_DEFINE3() argument
3948 return do_tkill(tgid, pid, sig); in SYSCALL_DEFINE3()
3958 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3964 return do_tkill(0, pid, sig); in SYSCALL_DEFINE2()
3967 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_sigqueueinfo() argument
3977 return kill_proc_info(sig, info, pid); in do_rt_sigqueueinfo()
3986 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, in SYSCALL_DEFINE3() argument
3990 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE3()
3993 return do_rt_sigqueueinfo(pid, sig, &info); in SYSCALL_DEFINE3()
3999 int, sig, in COMPAT_SYSCALL_DEFINE3()
4003 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE3()
4006 return do_rt_sigqueueinfo(pid, sig, &info); in COMPAT_SYSCALL_DEFINE3()
4010 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_tgsigqueueinfo() argument
4023 return do_send_specific(tgid, pid, sig, info); in do_rt_tgsigqueueinfo()
4026 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, in SYSCALL_DEFINE4() argument
4030 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE4()
4033 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in SYSCALL_DEFINE4()
4040 int, sig, in COMPAT_SYSCALL_DEFINE4()
4044 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE4()
4047 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in COMPAT_SYSCALL_DEFINE4()
4054 void kernel_sigaction(int sig, __sighandler_t action) in kernel_sigaction() argument
4057 current->sighand->action[sig - 1].sa.sa_handler = action; in kernel_sigaction()
4062 sigaddset(&mask, sig); in kernel_sigaction()
4077 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) in do_sigaction() argument
4083 if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig))) in do_sigaction()
4086 k = &p->sighand->action[sig-1]; in do_sigaction()
4129 if (sig_handler_ignored(sig_handler(p, sig), sig)) { in do_sigaction()
4131 sigaddset(&mask, sig); in do_sigaction()
4335 return put_user(set.sig[0], set32); in COMPAT_SYSCALL_DEFINE1()
4358 old_set = current->blocked.sig[0]; in SYSCALL_DEFINE3()
4374 new_blocked.sig[0] = new_set; in SYSCALL_DEFINE3()
4400 SYSCALL_DEFINE4(rt_sigaction, int, sig, in SYSCALL_DEFINE4() argument
4415 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); in SYSCALL_DEFINE4()
4425 COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, in COMPAT_SYSCALL_DEFINE4() argument
4454 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE4()
4472 SYSCALL_DEFINE3(sigaction, int, sig, in SYSCALL_DEFINE3() argument
4493 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in SYSCALL_DEFINE3()
4500 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in SYSCALL_DEFINE3()
4508 COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, in COMPAT_SYSCALL_DEFINE3() argument
4533 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE3()
4542 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in COMPAT_SYSCALL_DEFINE3()
4557 return current->blocked.sig[0]; in SYSCALL_DEFINE0()
4562 int old = current->blocked.sig[0]; in SYSCALL_DEFINE1()
4576 SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) in SYSCALL_DEFINE2() argument
4585 ret = do_sigaction(sig, &new_sa, &old_sa); in SYSCALL_DEFINE2()
4760 void kdb_send_sig(struct task_struct *t, int sig) in kdb_send_sig() argument
4782 ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID); in kdb_send_sig()
4786 sig, t->pid); in kdb_send_sig()
4788 kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid); in kdb_send_sig()