afl-fuzz: Fix double free
This crash was found by running afl-fuzz. When a compile error is found,
we would sometimes free the block list twice, once in compile_file() and
once again in compile_filter(). This change sets |*arg_blocks| to NULL
after freeing it to avoid that.
Bug: None
Test: make tests
Change-Id: I048e0008acd6bf386b96d2f895953bd646af156a
diff --git a/syscall_filter.c b/syscall_filter.c
index 0cb9138..cfbc0d8 100644
--- a/syscall_filter.c
+++ b/syscall_filter.c
@@ -606,6 +606,7 @@
if (!block) {
if (*arg_blocks) {
free_block_list(*arg_blocks);
+ *arg_blocks = NULL;
}
ret = -1;
goto free_line;