Date: Tue, 15 Jun 2021 23:55:16 GMT From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: afb36e289c1d - main - sigwait(2) and sigtimedwait(2) must not be restarted. Message-ID: <202106152355.15FNtGtB086641@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=afb36e289c1d96053b6063b0e548fc7d31dbd239 commit afb36e289c1d96053b6063b0e548fc7d31dbd239 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-06-06 23:00:10 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-06-15 23:00:18 +0000 sigwait(2) and sigtimedwait(2) must not be restarted. Reported by: dchagin Reviewed by: dchagin, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D30675 --- sys/kern/kern_sig.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 0453d3b2702c..a2709f38c5cb 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -1168,9 +1168,7 @@ sys_sigwait(struct thread *td, struct sigwait_args *uap) error = kern_sigtimedwait(td, set, &ksi, NULL); if (error) { if (error == EINTR && td->td_proc->p_osrel < P_OSREL_SIGWAIT) - error = ERESTART; - if (error == ERESTART) - return (error); + return (ERESTART); td->td_retval[0] = error; return (0); } @@ -1329,15 +1327,13 @@ kern_sigtimedwait(struct thread *td, sigset_t waitset, ksiginfo_t *ksi, error = msleep(ps, &p->p_mtx, PPAUSE|PCATCH, "sigwait", timo); - if (timeout != NULL) { - if (error == ERESTART) { - /* Timeout can not be restarted. */ - error = EINTR; - } else if (error == EAGAIN) { - /* We will calculate timeout by ourself. */ - error = 0; - } - } + /* The syscalls can not be restarted. */ + if (error == ERESTART) + error = EINTR; + + /* We will calculate timeout by ourself. */ + if (timeout != NULL && error == EAGAIN) + error = 0; /* * If PTRACE_SCE or PTRACE_SCX were set after
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