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()
211 int sig = 0; in next_signal() local
213 s = pending->signal.sig; in next_signal()
214 m = mask->sig; in next_signal()
224 sig = ffz(~x) + 1; in next_signal()
225 return sig; in next_signal()
234 sig = ffz(~x) + i*_NSIG_BPW + 1; in next_signal()
243 sig = ffz(~x) + _NSIG_BPW + 1; in next_signal()
251 return sig; in next_signal()
254 static inline void print_dropped_signal(int sig) in print_dropped_signal() argument
265 current->comm, current->pid, sig); in print_dropped_signal()
368 struct signal_struct *sig = task->signal; in task_participate_group_stop() local
378 if (!WARN_ON_ONCE(sig->group_stop_count == 0)) in task_participate_group_stop()
379 sig->group_stop_count--; in task_participate_group_stop()
385 if (!sig->group_stop_count && !(sig->flags & SIGNAL_STOP_STOPPED)) { in task_participate_group_stop()
386 signal_set_stop_flags(sig, SIGNAL_STOP_STOPPED); in task_participate_group_stop()
397 struct signal_struct *sig = current->signal; in task_join_group_stop() local
401 sig->group_stop_count++; in task_join_group_stop()
412 __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimit) in __sigqueue_alloc() argument
431 print_dropped_signal(sig); in __sigqueue_alloc()
492 int sig = q->info.si_signo; in __flush_itimer_signals() local
495 sigaddset(&retain, sig); in __flush_itimer_signals()
497 sigdelset(&signal, sig); in __flush_itimer_signals()
549 bool unhandled_signal(struct task_struct *tsk, int sig) in unhandled_signal() argument
551 void __user *handler = tsk->sighand->action[sig-1].sa.sa_handler; in unhandled_signal()
562 static void collect_signal(int sig, struct sigpending *list, kernel_siginfo_t *info, in collect_signal() argument
572 if (q->info.si_signo == sig) { in collect_signal()
579 sigdelset(&list->signal, sig); in collect_signal()
599 info->si_signo = sig; in collect_signal()
610 int sig = next_signal(pending, mask); in __dequeue_signal() local
612 if (sig) in __dequeue_signal()
613 collect_signal(sig, pending, info, resched_timer); in __dequeue_signal()
614 return sig; in __dequeue_signal()
710 if (!((pending->signal.sig[0] & ~tsk->blocked.sig[0]) & SYNCHRONOUS_MASK)) in dequeue_synchronous_signal()
822 static int check_kill_permission(int sig, struct kernel_siginfo *info, in check_kill_permission() argument
828 if (!valid_signal(sig)) in check_kill_permission()
834 error = audit_signal_info(sig, t); /* Let audit system see the signal */ in check_kill_permission()
840 switch (sig) { in check_kill_permission()
855 return security_task_kill(t, info, sig, NULL); in check_kill_permission()
894 static bool prepare_signal(int sig, struct task_struct *p, bool force) in prepare_signal() argument
902 return sig == SIGKILL; in prepare_signal()
906 } else if (sig_kernel_stop(sig)) { in prepare_signal()
914 } else if (sig == SIGCONT) { in prepare_signal()
956 return !sig_ignored(p, sig, force); in prepare_signal()
967 static inline bool wants_signal(int sig, struct task_struct *p) in wants_signal() argument
969 if (sigismember(&p->blocked, sig)) in wants_signal()
975 if (sig == SIGKILL) in wants_signal()
984 static void complete_signal(int sig, struct task_struct *p, enum pid_type type) in complete_signal() argument
995 if (wants_signal(sig, p)) in complete_signal()
1008 while (!wants_signal(sig, t)) { in complete_signal()
1025 if (sig_fatal(p, sig) && in complete_signal()
1027 !sigismember(&t->real_blocked, sig) && in complete_signal()
1028 (sig == SIGKILL || !p->ptrace)) { in complete_signal()
1032 if (!sig_kernel_coredump(sig)) { in complete_signal()
1040 signal->group_exit_code = sig; in complete_signal()
1056 signal_wake_up(t, sig == SIGKILL); in complete_signal()
1060 static inline bool legacy_queue(struct sigpending *signals, int sig) in legacy_queue() argument
1062 return (sig < SIGRTMIN) && sigismember(&signals->signal, sig); in legacy_queue()
1065 static int __send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, in __send_signal() argument
1076 if (!prepare_signal(sig, t, force)) in __send_signal()
1086 if (legacy_queue(pending, sig)) in __send_signal()
1093 if ((sig == SIGKILL) || (t->flags & PF_KTHREAD)) in __send_signal()
1105 if (sig < SIGRTMIN) in __send_signal()
1110 q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit); in __send_signal()
1116 q->info.si_signo = sig; in __send_signal()
1129 q->info.si_signo = sig; in __send_signal()
1140 sig >= SIGRTMIN && info->si_code != SI_USER) { in __send_signal()
1158 signalfd_notify(t, sig); in __send_signal()
1159 sigaddset(&pending->signal, sig); in __send_signal()
1167 if (sig == SIGCONT) in __send_signal()
1169 else if (sig_kernel_stop(sig)) in __send_signal()
1171 sigaddset(signal, sig); in __send_signal()
1175 complete_signal(sig, t, type); in __send_signal()
1177 trace_signal_generate(sig, info, t, type != PIDTYPE_PID, result); in __send_signal()
1203 static int send_signal(int sig, struct kernel_siginfo *info, struct task_struct *t, in send_signal() argument
1236 return __send_signal(sig, info, t, type, force); in send_signal()
1273 __group_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) in __group_send_sig_info() argument
1275 return send_signal(sig, info, p, PIDTYPE_TGID); in __group_send_sig_info()
1278 int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p, in do_send_sig_info() argument
1285 ret = send_signal(sig, info, p, type); in do_send_sig_info()
1309 int sig = info->si_signo; in force_sig_info_to_task() local
1312 action = &t->sighand->action[sig-1]; in force_sig_info_to_task()
1314 blocked = sigismember(&t->blocked, sig); in force_sig_info_to_task()
1318 sigdelset(&t->blocked, sig); in force_sig_info_to_task()
1328 ret = send_signal(sig, info, t, PIDTYPE_PID); in force_sig_info_to_task()
1398 int group_send_sig_info(int sig, struct kernel_siginfo *info, in group_send_sig_info() argument
1404 ret = check_kill_permission(sig, info, p); in group_send_sig_info()
1407 if (!ret && sig) in group_send_sig_info()
1408 ret = do_send_sig_info(sig, info, p, type); in group_send_sig_info()
1418 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp) in __kill_pgrp_info() argument
1426 int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID); in __kill_pgrp_info()
1433 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid) in kill_pid_info() argument
1442 error = group_send_sig_info(sig, info, p, PIDTYPE_TGID); in kill_pid_info()
1455 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_proc_info() argument
1459 error = kill_pid_info(sig, info, find_vpid(pid)); in kill_proc_info()
1500 int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, in kill_pid_usb_asyncio() argument
1509 info.si_signo = sig; in kill_pid_usb_asyncio()
1514 if (!valid_signal(sig)) in kill_pid_usb_asyncio()
1527 ret = security_task_kill(p, &info, sig, cred); in kill_pid_usb_asyncio()
1531 if (sig) { in kill_pid_usb_asyncio()
1533 ret = __send_signal(sig, &info, p, PIDTYPE_TGID, false); in kill_pid_usb_asyncio()
1551 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_something_info() argument
1557 ret = kill_pid_info(sig, info, find_vpid(pid)); in kill_something_info()
1568 ret = __kill_pgrp_info(sig, info, in kill_something_info()
1577 int err = group_send_sig_info(sig, info, p, in kill_something_info()
1595 int send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) in send_sig_info() argument
1601 if (!valid_signal(sig)) in send_sig_info()
1604 return do_send_sig_info(sig, info, p, PIDTYPE_PID); in send_sig_info()
1612 send_sig(int sig, struct task_struct *p, int priv) in send_sig() argument
1614 return send_sig_info(sig, __si_special(priv), p); in send_sig()
1618 void force_sig(int sig) in force_sig() argument
1623 info.si_signo = sig; in force_sig()
1638 void force_sigsegv(int sig) in force_sigsegv() argument
1642 if (sig == SIGSEGV) { in force_sigsegv()
1645 p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL; in force_sigsegv()
1651 int force_sig_fault_to_task(int sig, int code, void __user *addr in force_sig_fault_to_task() argument
1659 info.si_signo = sig; in force_sig_fault_to_task()
1674 int force_sig_fault(int sig, int code, void __user *addr in force_sig_fault() argument
1678 return force_sig_fault_to_task(sig, code, addr in force_sig_fault()
1683 int send_sig_fault(int sig, int code, void __user *addr in send_sig_fault() argument
1691 info.si_signo = sig; in send_sig_fault()
1779 int kill_pgrp(struct pid *pid, int sig, int priv) in kill_pgrp() argument
1784 ret = __kill_pgrp_info(sig, __si_special(priv), pid); in kill_pgrp()
1791 int kill_pid(struct pid *pid, int sig, int priv) in kill_pid() argument
1793 return kill_pid_info(sig, __si_special(priv), pid); in kill_pid()
1843 int sig = q->info.si_signo; in send_sigqueue() local
1859 if (!prepare_signal(sig, t, false)) in send_sigqueue()
1875 signalfd_notify(t, sig); in send_sigqueue()
1878 sigaddset(&pending->signal, sig); in send_sigqueue()
1879 complete_signal(sig, t, type); in send_sigqueue()
1882 trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result); in send_sigqueue()
1905 bool do_notify_parent(struct task_struct *tsk, int sig) in do_notify_parent() argument
1913 BUG_ON(sig == -1); in do_notify_parent()
1924 if (sig != SIGCHLD) { in do_notify_parent()
1930 sig = SIGCHLD; in do_notify_parent()
1934 info.si_signo = sig; in do_notify_parent()
1969 if (!tsk->ptrace && sig == SIGCHLD && in do_notify_parent()
1989 sig = 0; in do_notify_parent()
1991 if (valid_signal(sig) && sig) in do_notify_parent()
1992 __group_send_sig_info(sig, &info, tsk->parent); in do_notify_parent()
2302 struct signal_struct *sig = current->signal; in do_signal_stop() local
2312 unlikely(signal_group_exit(sig))) in do_signal_stop()
2333 if (!(sig->flags & SIGNAL_STOP_STOPPED)) in do_signal_stop()
2334 sig->group_exit_code = signr; in do_signal_stop()
2336 sig->group_stop_count = 0; in do_signal_stop()
2339 sig->group_stop_count++; in do_signal_stop()
2350 sig->group_stop_count++; in do_signal_stop()
2739 ksig->sig = signr; in get_signal()
2740 return ksig->sig > 0; in get_signal()
2765 sigaddset(&blocked, ksig->sig); in signal_delivered()
2773 force_sigsegv(ksig->sig); in signal_setup_done()
3128 static bool known_siginfo_layout(unsigned sig, int si_code) in known_siginfo_layout() argument
3133 if (sig_specific_sicodes(sig)) { in known_siginfo_layout()
3134 if (si_code <= sig_sicodes[sig].limit) in known_siginfo_layout()
3147 enum siginfo_layout siginfo_layout(unsigned sig, int si_code) in siginfo_layout() argument
3151 if ((sig < ARRAY_SIZE(sig_sicodes)) && in siginfo_layout()
3152 (si_code <= sig_sicodes[sig].limit)) { in siginfo_layout()
3153 layout = sig_sicodes[sig].layout; in siginfo_layout()
3155 if ((sig == SIGBUS) && in siginfo_layout()
3158 else if ((sig == SIGSEGV) && (si_code == SEGV_BNDERR)) in siginfo_layout()
3161 else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR)) in siginfo_layout()
3438 int sig, ret = 0; in do_sigtimedwait() local
3454 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3455 if (!sig && timeout) { in do_sigtimedwait()
3473 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3477 if (sig) in do_sigtimedwait()
3478 return sig; in do_sigtimedwait()
3619 static inline void prepare_kill_siginfo(int sig, struct kernel_siginfo *info) in prepare_kill_siginfo() argument
3622 info->si_signo = sig; in prepare_kill_siginfo()
3634 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3638 prepare_kill_siginfo(sig, &info); in SYSCALL_DEFINE2()
3640 return kill_something_info(sig, &info, pid); in SYSCALL_DEFINE2()
3708 SYSCALL_DEFINE4(pidfd_send_signal, int, pidfd, int, sig, in SYSCALL_DEFINE4() argument
3741 if (unlikely(sig != kinfo.si_signo)) in SYSCALL_DEFINE4()
3750 prepare_kill_siginfo(sig, &kinfo); in SYSCALL_DEFINE4()
3753 ret = kill_pid_info(sig, &kinfo, pid); in SYSCALL_DEFINE4()
3761 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info) in do_send_specific() argument
3769 error = check_kill_permission(sig, info, p); in do_send_specific()
3774 if (!error && sig) { in do_send_specific()
3775 error = do_send_sig_info(sig, info, p, PIDTYPE_PID); in do_send_specific()
3790 static int do_tkill(pid_t tgid, pid_t pid, int sig) in do_tkill() argument
3795 info.si_signo = sig; in do_tkill()
3801 return do_send_specific(tgid, pid, sig, &info); in do_tkill()
3814 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) in SYSCALL_DEFINE3() argument
3820 return do_tkill(tgid, pid, sig); in SYSCALL_DEFINE3()
3830 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3836 return do_tkill(0, pid, sig); in SYSCALL_DEFINE2()
3839 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_sigqueueinfo() argument
3849 return kill_proc_info(sig, info, pid); in do_rt_sigqueueinfo()
3858 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, in SYSCALL_DEFINE3() argument
3862 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE3()
3865 return do_rt_sigqueueinfo(pid, sig, &info); in SYSCALL_DEFINE3()
3871 int, sig, in COMPAT_SYSCALL_DEFINE3()
3875 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE3()
3878 return do_rt_sigqueueinfo(pid, sig, &info); in COMPAT_SYSCALL_DEFINE3()
3882 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_tgsigqueueinfo() argument
3895 return do_send_specific(tgid, pid, sig, info); in do_rt_tgsigqueueinfo()
3898 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, in SYSCALL_DEFINE4() argument
3902 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE4()
3905 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in SYSCALL_DEFINE4()
3912 int, sig, in COMPAT_SYSCALL_DEFINE4()
3916 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE4()
3919 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in COMPAT_SYSCALL_DEFINE4()
3926 void kernel_sigaction(int sig, __sighandler_t action) in kernel_sigaction() argument
3929 current->sighand->action[sig - 1].sa.sa_handler = action; in kernel_sigaction()
3934 sigaddset(&mask, sig); in kernel_sigaction()
3949 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) in do_sigaction() argument
3955 if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig))) in do_sigaction()
3958 k = &p->sighand->action[sig-1]; in do_sigaction()
3981 if (sig_handler_ignored(sig_handler(p, sig), sig)) { in do_sigaction()
3983 sigaddset(&mask, sig); in do_sigaction()
4163 return put_user(set.sig[0], set32); in COMPAT_SYSCALL_DEFINE1()
4186 old_set = current->blocked.sig[0]; in SYSCALL_DEFINE3()
4202 new_blocked.sig[0] = new_set; in SYSCALL_DEFINE3()
4228 SYSCALL_DEFINE4(rt_sigaction, int, sig, in SYSCALL_DEFINE4() argument
4243 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); in SYSCALL_DEFINE4()
4253 COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, in COMPAT_SYSCALL_DEFINE4() argument
4282 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE4()
4300 SYSCALL_DEFINE3(sigaction, int, sig, in SYSCALL_DEFINE3() argument
4321 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in SYSCALL_DEFINE3()
4328 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in SYSCALL_DEFINE3()
4336 COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, in COMPAT_SYSCALL_DEFINE3() argument
4361 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE3()
4370 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in COMPAT_SYSCALL_DEFINE3()
4385 return current->blocked.sig[0]; in SYSCALL_DEFINE0()
4390 int old = current->blocked.sig[0]; in SYSCALL_DEFINE1()
4404 SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) in SYSCALL_DEFINE2() argument
4413 ret = do_sigaction(sig, &new_sa, &old_sa); in SYSCALL_DEFINE2()
4585 void kdb_send_sig(struct task_struct *t, int sig) in kdb_send_sig() argument
4607 ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID); in kdb_send_sig()
4611 sig, t->pid); in kdb_send_sig()
4613 kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid); in kdb_send_sig()