Date: Mon, 2 Oct 2023 22:31:20 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: 5804a1623054 - main - nosys(): add kern.signosys tunable/sysctl to control SIGSYS Message-ID: <202310022231.392MVK6Z099057@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=5804a1623054d865618d77cfac86978f03b8111a commit 5804a1623054d865618d77cfac86978f03b8111a Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2023-09-25 16:36:04 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2023-10-02 22:30:53 +0000 nosys(): add kern.signosys tunable/sysctl to control SIGSYS Reviewed by: dchagin, markj Discussed with: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D41976 --- sys/kern/kern_sig.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index 16bc1e441119..c847783cd3da 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -159,6 +159,10 @@ static int kern_lognosys = 0; SYSCTL_INT(_kern, OID_AUTO, lognosys, CTLFLAG_RWTUN, &kern_lognosys, 0, "Log invalid syscalls"); +static int kern_signosys = 1; +SYSCTL_INT(_kern, OID_AUTO, signosys, CTLFLAG_RWTUN, &kern_signosys, 0, + "Send SIGSYS on return from invalid syscall"); + __read_frequently bool sigfastblock_fetch_always = false; SYSCTL_BOOL(_kern, OID_AUTO, sigfastblock_fetch_always, CTLFLAG_RWTUN, &sigfastblock_fetch_always, 0, @@ -4219,7 +4223,7 @@ nosys(struct thread *td, struct nosys_args *args) p = td->td_proc; - if (SV_PROC_FLAG(p, SV_SIGSYS) != 0) { + if (SV_PROC_FLAG(p, SV_SIGSYS) != 0 && kern_signosys) { PROC_LOCK(p); tdsignal(td, SIGSYS); PROC_UNLOCK(p);
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