x86_64: null pointer check in signal dispatch

lux-operating-system · Nov 27, 2024 · 070ffb7 · 070ffb7
1 parent cd5faa9
commit 070ffb7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/platform/x86_64/ipc/signal.c b/src/platform/x86_64/ipc/signal.c
@@ -63,7 +63,8 @@ int platformSendSignal(Thread *sender, Thread *dest, int signum, uintptr_t handl
 
     siginfo_t *siginfo = (siginfo_t *) dest->siginfo;
     siginfo->si_signo = signum;
-    siginfo->si_pid = sender->tid;
+    if(sender) siginfo->si_pid = sender->tid;
+    else siginfo->si_pid = 0;   // we will use pid 0 for the kernel
 
     if(p) siginfo->si_uid = p->user;
     else siginfo->si_uid = 0;