diff options
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 2ac3a668d9dd..34b7d6abce8f 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -21,6 +21,7 @@ #include <linux/syscalls.h> #include <linux/ptrace.h> #include <linux/signal.h> +#include <linux/signalfd.h> #include <linux/capability.h> #include <linux/freezer.h> #include <linux/pid_namespace.h> @@ -113,8 +114,7 @@ void recalc_sigpending(void) /* Given the mask, find the first available signal that should be serviced. */ -static int -next_signal(struct sigpending *pending, sigset_t *mask) +int next_signal(struct sigpending *pending, sigset_t *mask) { unsigned long i, *s, *m, x; int sig = 0; @@ -630,6 +630,12 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, int ret = 0; /* + * Deliver the signal to listening signalfds. This must be called + * with the sighand lock held. + */ + signalfd_notify(t, sig); + + /* * fast-pathed signals for kernel-internal things like SIGSTOP * or SIGKILL. */ @@ -1280,6 +1286,11 @@ int send_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) ret = 1; goto out; } + /* + * Deliver the signal to listening signalfds. This must be called + * with the sighand lock held. + */ + signalfd_notify(p, sig); list_add_tail(&q->list, &p->pending.list); sigaddset(&p->pending.signal, sig); @@ -1323,6 +1334,11 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) q->info.si_overrun++; goto out; } + /* + * Deliver the signal to listening signalfds. This must be called + * with the sighand lock held. + */ + signalfd_notify(p, sig); /* * Put this signal on the shared-pending queue. @@ -1983,6 +1999,8 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t *from) /* * If you change siginfo_t structure, please be sure * this code is fixed accordingly. + * Please remember to update the signalfd_copyinfo() function + * inside fs/signalfd.c too, in case siginfo_t changes. * It should never copy any pad contained in the structure * to avoid security leaks, but must copy the generic * 3 ints plus the relevant union member. |