[PATCH] do_sigaction: cleanup ->sa_mask manipulation
Clear unblockable signals beforehand. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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c70d3d703a
Коммит
9ac95f2f90
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@ -1098,7 +1098,7 @@ extern struct sigqueue *sigqueue_alloc(void);
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extern void sigqueue_free(struct sigqueue *);
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extern int send_sigqueue(int, struct sigqueue *, struct task_struct *);
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extern int send_group_sigqueue(int, struct sigqueue *, struct task_struct *);
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extern int do_sigaction(int, const struct k_sigaction *, struct k_sigaction *);
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extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
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extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
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/* These can be the second arg to send_sig_info/send_group_sig_info. */
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@ -2430,7 +2430,7 @@ sys_rt_sigqueueinfo(int pid, int sig, siginfo_t __user *uinfo)
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}
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int
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do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact)
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do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
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{
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struct k_sigaction *k;
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sigset_t mask;
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@ -2454,6 +2454,8 @@ do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact)
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*oact = *k;
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if (act) {
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sigdelsetmask(&act->sa.sa_mask,
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sigmask(SIGKILL) | sigmask(SIGSTOP));
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/*
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* POSIX 3.3.1.3:
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* "Setting a signal action to SIG_IGN for a signal that is
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@ -2479,8 +2481,6 @@ do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact)
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read_lock(&tasklist_lock);
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spin_lock_irq(&t->sighand->siglock);
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*k = *act;
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sigdelsetmask(&k->sa.sa_mask,
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sigmask(SIGKILL) | sigmask(SIGSTOP));
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sigemptyset(&mask);
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sigaddset(&mask, sig);
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rm_from_queue_full(&mask, &t->signal->shared_pending);
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@ -2495,8 +2495,6 @@ do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact)
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}
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*k = *act;
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sigdelsetmask(&k->sa.sa_mask,
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sigmask(SIGKILL) | sigmask(SIGSTOP));
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}
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spin_unlock_irq(¤t->sighand->siglock);
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