diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2023-09-25 16:36:04 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2023-10-02 22:30:53 +0000 |
| commit | 5804a1623054d865618d77cfac86978f03b8111a (patch) | |
| tree | 21c24bf2c5e944fdae776be315a5086fe8c53380 | |
| parent | b82b4ae752501469053979393e33bbfa74fbc9d2 (diff) | |
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
| -rw-r--r-- | sys/kern/kern_sig.c | 6 |
1 files changed, 5 insertions, 1 deletions
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); |