From 1dba3534c4c0738036369eb1b73f5f246af29c62 Mon Sep 17 00:00:00 2001 From: Matheus Date: Sun, 26 May 2024 20:50:32 -0300 Subject: [PATCH] signal: check for parent when sending SIGCHLD --- kernel-src/sys/signal.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel-src/sys/signal.c b/kernel-src/sys/signal.c index d1bc9d02..d2a18048 100644 --- a/kernel-src/sys/signal.c +++ b/kernel-src/sys/signal.c @@ -218,7 +218,8 @@ void signal_signalproc(struct proc_t *proc, int signal) { proc->status = 0x7f; proc->status |= signal << 8; proc->signals.stopunwaited = true; - if ((proc->parent->signals.actions[SIGCHLD].flags & SA_NOCLDSTOP) == 0) { + + if (proc->parent && (proc->parent->signals.actions[SIGCHLD].flags & SA_NOCLDSTOP) == 0) { signal_signalproc(proc->parent, SIGCHLD); } semaphore_signal(&proc->parent->waitsem); @@ -228,7 +229,7 @@ void signal_signalproc(struct proc_t *proc, int signal) { if (threadcontinued) { proc->status = 0xffff; proc->signals.continueunwaited = true; - if ((proc->parent->signals.actions[SIGCHLD].flags & SA_NOCLDSTOP) == 0) { + if (proc->parent && (proc->parent->signals.actions[SIGCHLD].flags & SA_NOCLDSTOP) == 0) { signal_signalproc(proc->parent, SIGCHLD); } semaphore_signal(&proc->parent->waitsem);