From b2733a3810072049726710d0c118d68f35318bae Mon Sep 17 00:00:00 2001
From: antifallobst <antifallobst@systemausfall.org>
Date: Thu, 9 Mar 2023 00:09:20 +0100
Subject: [PATCH] fix (stack-tracing): added NULL reference check for current
 process

---
 kernel/src/mm/stack.c    | 6 +++++-
 kernel/src/utils/panic.c | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/src/mm/stack.c b/kernel/src/mm/stack.c
index a13d4ef..47be71f 100644
--- a/kernel/src/mm/stack.c
+++ b/kernel/src/mm/stack.c
@@ -32,10 +32,14 @@ void stack_dump_call_info(uint64_t rip, symbol_T* symbol) {
 void stack_trace_call_stack(uint64_t rbp) {
     uint64_t    rip     = ((uint64_t*)rbp)[1];
     process_T*  process = scheduler_get_current_process();
+    if (process == NULL) {
+        log(LOG_NONE, "    0x%x       ->  <failed to resolve symbol>  (process NULL reference)", rip);
+        return;
+    }
     symbol_T*   symbol  = symbol_resolve_function_from_rip(process->executable->symbols, process->executable->num_symbols, rip);
 
     if (symbol == NULL) {
-        log(LOG_NONE, "    0x%x       ->  <failed to resolve symbol>", rip);
+        log(LOG_NONE, "    0x%x       ->  <failed to resolve symbol>  (symbol NULL reference)", rip);
         return;
     }
 
diff --git a/kernel/src/utils/panic.c b/kernel/src/utils/panic.c
index 023ae22..01daadf 100644
--- a/kernel/src/utils/panic.c
+++ b/kernel/src/utils/panic.c
@@ -91,7 +91,7 @@ void panic_log_call_stack(cpu_state_T* state) {
 
     symbol_T* symbol  = symbol_resolve_function_from_rip(process->executable->symbols, process->executable->num_symbols, state->rip);
     if (symbol == NULL) {
-        log(LOG_NONE, "    0x%x       ->  <failed to resolve symbol>", state->rip);
+        log(LOG_NONE, "    0x%x       ->  <failed to resolve symbol>  (symbol NULL reference)", state->rip);
         return;
     }