From: Liang Luo <luoliang@kylinos.cn>
exit.c does not check the return value of exit__open(). If it returns
NULL, which happens when the skeleton wrapper fails to allocate the
object or open the BPF ELF, the very next line dereferences it via
SCX_ENUM_INIT(). That macro expands to SCX_ENUM_SET(), which accesses
skel->rodata, causing a NULL pointer dereference.
Every other selftest guards this with SCX_FAIL_IF(!skel, ...); exit.c
is the only one missing it.
Fixes: a5db7817af78 ("sched_ext: Add selftests")
Signed-off-by: Liang Luo <luoliang@kylinos.cn>
---
tools/testing/selftests/sched_ext/exit.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/sched_ext/exit.c b/tools/testing/selftests/sched_ext/exit.c
index b987611789d1..01b17092d5c8 100644
--- a/tools/testing/selftests/sched_ext/exit.c
+++ b/tools/testing/selftests/sched_ext/exit.c
@@ -31,6 +31,7 @@ static enum scx_test_status run(void *ctx)
continue;
skel = exit__open();
+ SCX_FAIL_IF(!skel, "Failed to open");
SCX_ENUM_INIT(skel);
skel->rodata->exit_point = tc;
SCX_FAIL_IF(exit__load(skel), "Failed to load skel");
--
2.43.0