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()
1318 int sig = info->si_signo; in force_sig_info_to_task() local
1321 action = &t->sighand->action[sig-1]; in force_sig_info_to_task()
1323 blocked = sigismember(&t->blocked, sig); in force_sig_info_to_task()
1327 sigdelset(&t->blocked, sig); in force_sig_info_to_task()
1337 ret = send_signal(sig, info, t, PIDTYPE_PID); in force_sig_info_to_task()
1422 int group_send_sig_info(int sig, struct kernel_siginfo *info, in group_send_sig_info() argument
1428 ret = check_kill_permission(sig, info, p); in group_send_sig_info()
1431 if (!ret && sig) in group_send_sig_info()
1432 ret = do_send_sig_info(sig, info, p, type); in group_send_sig_info()
1442 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp) in __kill_pgrp_info() argument
1450 int err = group_send_sig_info(sig, info, p, PIDTYPE_PGID); in __kill_pgrp_info()
1457 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid) in kill_pid_info() argument
1466 error = group_send_sig_info(sig, info, p, PIDTYPE_TGID); in kill_pid_info()
1479 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_proc_info() argument
1483 error = kill_pid_info(sig, info, find_vpid(pid)); in kill_proc_info()
1524 int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr, in kill_pid_usb_asyncio() argument
1532 if (!valid_signal(sig)) in kill_pid_usb_asyncio()
1536 info.si_signo = sig; in kill_pid_usb_asyncio()
1551 ret = security_task_kill(p, &info, sig, cred); in kill_pid_usb_asyncio()
1555 if (sig) { in kill_pid_usb_asyncio()
1557 ret = __send_signal(sig, &info, p, PIDTYPE_TGID, false); in kill_pid_usb_asyncio()
1575 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid) in kill_something_info() argument
1580 return kill_proc_info(sig, info, pid); in kill_something_info()
1588 ret = __kill_pgrp_info(sig, info, in kill_something_info()
1597 int err = group_send_sig_info(sig, info, p, in kill_something_info()
1615 int send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p) in send_sig_info() argument
1621 if (!valid_signal(sig)) in send_sig_info()
1624 return do_send_sig_info(sig, info, p, PIDTYPE_PID); in send_sig_info()
1632 send_sig(int sig, struct task_struct *p, int priv) in send_sig() argument
1634 return send_sig_info(sig, __si_special(priv), p); in send_sig()
1638 void force_sig(int sig) in force_sig() argument
1643 info.si_signo = sig; in force_sig()
1658 void force_sigsegv(int sig) in force_sigsegv() argument
1662 if (sig == SIGSEGV) { in force_sigsegv()
1665 p->sighand->action[sig - 1].sa.sa_handler = SIG_DFL; in force_sigsegv()
1671 int force_sig_fault_to_task(int sig, int code, void __user *addr in force_sig_fault_to_task() argument
1678 info.si_signo = sig; in force_sig_fault_to_task()
1690 int force_sig_fault(int sig, int code, void __user *addr in force_sig_fault() argument
1693 return force_sig_fault_to_task(sig, code, addr in force_sig_fault()
1697 int send_sig_fault(int sig, int code, void __user *addr in send_sig_fault() argument
1704 info.si_signo = sig; in send_sig_fault()
1828 int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno) in force_sig_fault_trapno() argument
1833 info.si_signo = sig; in force_sig_fault_trapno()
1844 int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno, in send_sig_fault_trapno() argument
1850 info.si_signo = sig; in send_sig_fault_trapno()
1858 int kill_pgrp(struct pid *pid, int sig, int priv) in kill_pgrp() argument
1863 ret = __kill_pgrp_info(sig, __si_special(priv), pid); in kill_pgrp()
1870 int kill_pid(struct pid *pid, int sig, int priv) in kill_pid() argument
1872 return kill_pid_info(sig, __si_special(priv), pid); in kill_pid()
1917 int sig = q->info.si_signo; in send_sigqueue() local
1933 if (!prepare_signal(sig, t, false)) in send_sigqueue()
1949 signalfd_notify(t, sig); in send_sigqueue()
1952 sigaddset(&pending->signal, sig); in send_sigqueue()
1953 complete_signal(sig, t, type); in send_sigqueue()
1956 trace_signal_generate(sig, &q->info, t, type != PIDTYPE_PID, result); in send_sigqueue()
1979 bool do_notify_parent(struct task_struct *tsk, int sig) in do_notify_parent() argument
1987 BUG_ON(sig == -1); in do_notify_parent()
1998 if (sig != SIGCHLD) { in do_notify_parent()
2004 sig = SIGCHLD; in do_notify_parent()
2008 info.si_signo = sig; in do_notify_parent()
2043 if (!tsk->ptrace && sig == SIGCHLD && in do_notify_parent()
2063 sig = 0; in do_notify_parent()
2069 if (valid_signal(sig) && sig) in do_notify_parent()
2070 __send_signal(sig, &info, tsk->parent, PIDTYPE_TGID, false); in do_notify_parent()
2380 struct signal_struct *sig = current->signal; in do_signal_stop() local
2390 unlikely(signal_group_exit(sig))) in do_signal_stop()
2411 if (!(sig->flags & SIGNAL_STOP_STOPPED)) in do_signal_stop()
2412 sig->group_exit_code = signr; in do_signal_stop()
2414 sig->group_stop_count = 0; in do_signal_stop()
2417 sig->group_stop_count++; in do_signal_stop()
2428 sig->group_stop_count++; in do_signal_stop()
2601 switch (siginfo_layout(ksig->sig, ksig->info.si_code)) { in hide_si_addr_tag_bits()
2609 ksig->info.si_addr, ksig->sig, ksig->info.si_code); in hide_si_addr_tag_bits()
2860 ksig->sig = signr; in get_signal()
2865 return ksig->sig > 0; in get_signal()
2890 sigaddset(&blocked, ksig->sig); in signal_delivered()
2900 force_sigsegv(ksig->sig); in signal_setup_done()
3255 static bool known_siginfo_layout(unsigned sig, int si_code) in known_siginfo_layout() argument
3260 if (sig_specific_sicodes(sig)) { in known_siginfo_layout()
3261 if (si_code <= sig_sicodes[sig].limit) in known_siginfo_layout()
3274 enum siginfo_layout siginfo_layout(unsigned sig, int si_code) in siginfo_layout() argument
3278 if ((sig < ARRAY_SIZE(sig_sicodes)) && in siginfo_layout()
3279 (si_code <= sig_sicodes[sig].limit)) { in siginfo_layout()
3280 layout = sig_sicodes[sig].layout; in siginfo_layout()
3282 if ((sig == SIGBUS) && in siginfo_layout()
3285 else if ((sig == SIGSEGV) && (si_code == SEGV_BNDERR)) in siginfo_layout()
3288 else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR)) in siginfo_layout()
3291 else if ((sig == SIGTRAP) && (si_code == TRAP_PERF)) in siginfo_layout()
3294 (sig == SIGILL) && (si_code == ILL_ILLTRP)) in siginfo_layout()
3297 ((sig == SIGFPE) || in siginfo_layout()
3298 ((sig == SIGTRAP) && (si_code == TRAP_UNK)))) in siginfo_layout()
3568 int sig, ret = 0; in do_sigtimedwait() local
3584 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3585 if (!sig && timeout) { in do_sigtimedwait()
3603 sig = dequeue_signal(tsk, &mask, info); in do_sigtimedwait()
3607 if (sig) in do_sigtimedwait()
3608 return sig; in do_sigtimedwait()
3749 static inline void prepare_kill_siginfo(int sig, struct kernel_siginfo *info) in prepare_kill_siginfo() argument
3752 info->si_signo = sig; in prepare_kill_siginfo()
3764 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3768 prepare_kill_siginfo(sig, &info); in SYSCALL_DEFINE2()
3770 return kill_something_info(sig, &info, pid); in SYSCALL_DEFINE2()
3839 SYSCALL_DEFINE4(pidfd_send_signal, int, pidfd, int, sig, in SYSCALL_DEFINE4() argument
3872 if (unlikely(sig != kinfo.si_signo)) in SYSCALL_DEFINE4()
3881 prepare_kill_siginfo(sig, &kinfo); in SYSCALL_DEFINE4()
3884 ret = kill_pid_info(sig, &kinfo, pid); in SYSCALL_DEFINE4()
3892 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info) in do_send_specific() argument
3900 error = check_kill_permission(sig, info, p); in do_send_specific()
3905 if (!error && sig) { in do_send_specific()
3906 error = do_send_sig_info(sig, info, p, PIDTYPE_PID); in do_send_specific()
3921 static int do_tkill(pid_t tgid, pid_t pid, int sig) in do_tkill() argument
3926 info.si_signo = sig; in do_tkill()
3932 return do_send_specific(tgid, pid, sig, &info); in do_tkill()
3945 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) in SYSCALL_DEFINE3() argument
3951 return do_tkill(tgid, pid, sig); in SYSCALL_DEFINE3()
3961 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) in SYSCALL_DEFINE2() argument
3967 return do_tkill(0, pid, sig); in SYSCALL_DEFINE2()
3970 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_sigqueueinfo() argument
3980 return kill_proc_info(sig, info, pid); in do_rt_sigqueueinfo()
3989 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, in SYSCALL_DEFINE3() argument
3993 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE3()
3996 return do_rt_sigqueueinfo(pid, sig, &info); in SYSCALL_DEFINE3()
4002 int, sig, in COMPAT_SYSCALL_DEFINE3()
4006 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE3()
4009 return do_rt_sigqueueinfo(pid, sig, &info); in COMPAT_SYSCALL_DEFINE3()
4013 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info) in do_rt_tgsigqueueinfo() argument
4026 return do_send_specific(tgid, pid, sig, info); in do_rt_tgsigqueueinfo()
4029 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, in SYSCALL_DEFINE4() argument
4033 int ret = __copy_siginfo_from_user(sig, &info, uinfo); in SYSCALL_DEFINE4()
4036 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in SYSCALL_DEFINE4()
4043 int, sig, in COMPAT_SYSCALL_DEFINE4()
4047 int ret = __copy_siginfo_from_user32(sig, &info, uinfo); in COMPAT_SYSCALL_DEFINE4()
4050 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); in COMPAT_SYSCALL_DEFINE4()
4057 void kernel_sigaction(int sig, __sighandler_t action) in kernel_sigaction() argument
4060 current->sighand->action[sig - 1].sa.sa_handler = action; in kernel_sigaction()
4065 sigaddset(&mask, sig); in kernel_sigaction()
4080 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) in do_sigaction() argument
4086 if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig))) in do_sigaction()
4089 k = &p->sighand->action[sig-1]; in do_sigaction()
4128 if (sig_handler_ignored(sig_handler(p, sig), sig)) { in do_sigaction()
4130 sigaddset(&mask, sig); in do_sigaction()
4302 return put_user(set.sig[0], set32); in COMPAT_SYSCALL_DEFINE1()
4325 old_set = current->blocked.sig[0]; in SYSCALL_DEFINE3()
4341 new_blocked.sig[0] = new_set; in SYSCALL_DEFINE3()
4367 SYSCALL_DEFINE4(rt_sigaction, int, sig, in SYSCALL_DEFINE4() argument
4382 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL); in SYSCALL_DEFINE4()
4392 COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, in COMPAT_SYSCALL_DEFINE4() argument
4421 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE4()
4439 SYSCALL_DEFINE3(sigaction, int, sig, in SYSCALL_DEFINE3() argument
4460 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in SYSCALL_DEFINE3()
4467 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in SYSCALL_DEFINE3()
4475 COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, in COMPAT_SYSCALL_DEFINE3() argument
4500 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); in COMPAT_SYSCALL_DEFINE3()
4509 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) in COMPAT_SYSCALL_DEFINE3()
4524 return current->blocked.sig[0]; in SYSCALL_DEFINE0()
4529 int old = current->blocked.sig[0]; in SYSCALL_DEFINE1()
4543 SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler) in SYSCALL_DEFINE2() argument
4552 ret = do_sigaction(sig, &new_sa, &old_sa); in SYSCALL_DEFINE2()
4727 void kdb_send_sig(struct task_struct *t, int sig) in kdb_send_sig() argument
4749 ret = send_signal(sig, SEND_SIG_PRIV, t, PIDTYPE_PID); in kdb_send_sig()
4753 sig, t->pid); in kdb_send_sig()
4755 kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid); in kdb_send_sig()