[rtems commit] rtems-debugger-threads.c: Fix three Dereference before null check errors
Joel Sherrill
joel at rtems.org
Fri Feb 12 23:13:43 UTC 2021
Module: rtems
Branch: master
Commit: f65d3384dd923c9ead9bcf264592bd879054f6dc
Changeset: http://git.rtems.org/rtems/commit/?id=f65d3384dd923c9ead9bcf264592bd879054f6dc
Author: Ryan Long <ryan.long at oarcorp.com>
Date: Fri Feb 12 13:50:36 2021 -0500
rtems-debugger-threads.c: Fix three Dereference before null check errors
CID 1468681: Dereference before null check in rtems_debugger_thread_continue().
CID 1468690: Dereference before null check in rtems_debugger_thread_system_resume().
CID 1468694: Dereference before null check in rtems_debugger_thread_find_index().
Closes #4241.
---
cpukit/libdebugger/rtems-debugger-threads.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/cpukit/libdebugger/rtems-debugger-threads.c b/cpukit/libdebugger/rtems-debugger-threads.c
index 84a9faa..5b96e5f 100644
--- a/cpukit/libdebugger/rtems-debugger-threads.c
+++ b/cpukit/libdebugger/rtems-debugger-threads.c
@@ -148,9 +148,9 @@ int
rtems_debugger_thread_find_index(rtems_id id)
{
rtems_debugger_threads* threads = rtems_debugger->threads;
- rtems_debugger_thread* current = rtems_debugger_thread_current(threads);
int r = -1;
if (threads != NULL) {
+ rtems_debugger_thread* current = rtems_debugger_thread_current(threads);
size_t i;
for (i = 0; i < threads->current.level; ++i) {
if (id == 0 || current[i].id == id) {
@@ -347,8 +347,11 @@ rtems_debugger_thread_system_resume(bool detaching)
rtems_debugger_threads* threads = rtems_debugger->threads;
rtems_debugger_thread* current;
int r = 0;
+ if (threads == NULL) {
+ return r;
+ }
current = rtems_debugger_thread_current(threads);
- if (threads != NULL && current != NULL) {
+ if (current != NULL) {
size_t i;
if (rtems_debugger_verbose())
rtems_debugger_printf("rtems-db: sys: : resuming\n");
@@ -430,8 +433,13 @@ rtems_debugger_thread_continue_all(void)
rtems_debugger_threads* threads = rtems_debugger->threads;
rtems_debugger_thread* current;
int r = 0;
+ if (threads == NULL) {
+ r = -1;
+ errno = EIO;
+ return r;
+ }
current = rtems_debugger_thread_current(threads);
- if (threads != NULL && current != NULL) {
+ if (current != NULL) {
size_t i;
for (i = 0; i < threads->current.level; ++i) {
rtems_debugger_thread* thread = ¤t[i];
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