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Lock the proc lock around calls to tdsignal() in the sigwait() family of

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syscalls.
This commit is contained in:
John Baldwin 2003-05-05 21:18:10 +00:00
parent 6711f10fb6
commit 18440c7fe7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114755
1 changed files with 12 additions and 6 deletions
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18
sys/kern/kern_sig.c
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@ -732,9 +732,11 @@ sigwait(struct thread *td, struct sigwait_args *uap)
error = copyout(&info.si_signo, uap->sig, sizeof(info.si_signo));
/* Repost if we got an error. */
if (error && info.si_signo)
if (error && info.si_signo) {
PROC_LOCK(td->td_proc);
tdsignal(td, info.si_signo);
PROC_UNLOCK(td->td_proc);
}
return (error);
}
/*
@ -768,9 +770,11 @@ sigtimedwait(struct thread *td, struct sigtimedwait_args *uap)
error = copyout(&info, uap->info, sizeof(info));
/* Repost if we got an error. */
if (error && info.si_signo)
if (error && info.si_signo) {
PROC_LOCK(td->td_proc);
tdsignal(td, info.si_signo);
PROC_UNLOCK(td->td_proc);
}
return (error);
}
@ -794,9 +798,11 @@ sigwaitinfo(struct thread *td, struct sigwaitinfo_args *uap)
error = copyout(&info, uap->info, sizeof(info));
/* Repost if we got an error. */
if (error && info.si_signo)
if (error && info.si_signo) {
PROC_LOCK(td->td_proc);
tdsignal(td, info.si_signo);
PROC_UNLOCK(td->td_proc);
}
return (error);
}