Merge branch 'test_progs-asan'

Andrii Nakryiko says:

====================
Add necessary infra to build selftests with ASAN (or any other sanitizer). Fix
a bunch of found memory leaks and other memory access issues.

v1->v2:
  - don't add ASAN flavor, but allow extra flags for build (Alexei);
  - fix few more found issues, which somehow were missed first time.
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/lib/bpf/hashmap.c

@@ -59,7 +59,14 @@ struct hashmap *hashmap__new(hashmap_hash_fn hash_fn,
 
 void hashmap__clear(struct hashmap *map)
 {
+	struct hashmap_entry *cur, *tmp;
+	int bkt;
+
+	hashmap__for_each_entry_safe(map, cur, tmp, bkt) {
+		free(cur);
+	}
 	free(map->buckets);
+	map->buckets = NULL;
 	map->cap = map->cap_bits = map->sz = 0;
 }
 

tools/lib/bpf/libbpf.c

@@ -6934,6 +6934,7 @@ int libbpf_find_vmlinux_btf_id(const char *name,
 			       enum bpf_attach_type attach_type)
 {
 	struct btf *btf;
+	int err;
 
 	btf = libbpf_find_kernel_btf();
 	if (IS_ERR(btf)) {
@@ -6941,7 +6942,9 @@ int libbpf_find_vmlinux_btf_id(const char *name,
 		return -EINVAL;
 	}
 
-	return __find_vmlinux_btf_id(btf, name, attach_type);
+	err = __find_vmlinux_btf_id(btf, name, attach_type);
+	btf__free(btf);
+	return err;
 }
 
 static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)

tools/testing/selftests/bpf/.gitignore

@@ -30,8 +30,6 @@ test_tcpnotify_user
 test_libbpf
 test_tcp_check_syncookie_user
 test_sysctl
-test_hashmap
-test_btf_dump
 test_current_pid_tgid_new_ns
 xdping
 test_cpp
@@ -39,4 +37,4 @@ test_cpp
 /no_alu32
 /bpf_gcc
 /tools
-
+/runqslower

tools/testing/selftests/bpf/Makefile

@@ -20,9 +20,10 @@ CLANG		?= clang
 LLC		?= llc
 LLVM_OBJCOPY	?= llvm-objcopy
 BPF_GCC		?= $(shell command -v bpf-gcc;)
-CFLAGS += -g -rdynamic -Wall -O2 $(GENFLAGS) -I$(CURDIR)		\
-	  -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) -I$(TOOLSINCDIR)	\
-	  -I$(APIDIR)							\
+SAN_CFLAGS	?=
+CFLAGS += -g -rdynamic -Wall -O2 $(GENFLAGS) $(SAN_CFLAGS)		\
+	  -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)		\
+	  -I$(TOOLSINCDIR) -I$(APIDIR)					\
 	  -Dbpf_prog_load=bpf_prog_test_load				\
 	  -Dbpf_load_program=bpf_test_load_program
 LDLIBS += -lcap -lelf -lz -lrt -lpthread
@@ -32,7 +33,7 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test
 	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
 	test_sock test_btf test_sockmap get_cgroup_id_user test_socket_cookie \
 	test_cgroup_storage \
-	test_netcnt test_tcpnotify_user test_sock_fields test_sysctl test_hashmap \
+	test_netcnt test_tcpnotify_user test_sock_fields test_sysctl \
 	test_progs-no_alu32 \
 	test_current_pid_tgid_new_ns
 
@@ -324,7 +325,7 @@ $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:			\
 		      $(TRUNNER_BPF_SKELS)				\
 		      $$(BPFOBJ) | $(TRUNNER_OUTPUT)
 	$$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
-	cd $$(@D) && $$(CC) $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
+	cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)
 
 $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:				\
 		       %.c						\

tools/testing/selftests/bpf/prog_tests/core_reloc.c

@@ -392,7 +392,7 @@ static struct core_reloc_test_case test_cases[] = {
 		.input = STRUCT_TO_CHAR_PTR(core_reloc_existence___minimal) {
 			.a = 42,
 		},
-		.input_len = sizeof(struct core_reloc_existence),
+		.input_len = sizeof(struct core_reloc_existence___minimal),
 		.output = STRUCT_TO_CHAR_PTR(core_reloc_existence_output) {
 			.a_exists = 1,
 			.b_exists = 0,

tools/testing/selftests/bpf/test_hashmap.c → tools/testing/selftests/bpf/prog_tests/hashmap.c

@@ -5,26 +5,17 @@
  *
  * Copyright (c) 2019 Facebook
  */
-#include <stdio.h>
-#include <errno.h>
-#include <linux/err.h>
+#include "test_progs.h"
 #include "bpf/hashmap.h"
 
-#define CHECK(condition, format...) ({					\
-	int __ret = !!(condition);					\
-	if (__ret) {							\
-		fprintf(stderr, "%s:%d:FAIL ", __func__, __LINE__);	\
-		fprintf(stderr, format);				\
-	}								\
-	__ret;								\
-})
+static int duration = 0;
 
-size_t hash_fn(const void *k, void *ctx)
+static size_t hash_fn(const void *k, void *ctx)
 {
 	return (long)k;
 }
 
-bool equal_fn(const void *a, const void *b, void *ctx)
+static bool equal_fn(const void *a, const void *b, void *ctx)
 {
 	return (long)a == (long)b;
 }
@@ -49,53 +40,55 @@ static inline size_t exp_cap(size_t sz)
 
 #define ELEM_CNT 62
 
-int test_hashmap_generic(void)
+static void test_hashmap_generic(void)
 {
 	struct hashmap_entry *entry, *tmp;
 	int err, bkt, found_cnt, i;
 	long long found_msk;
 	struct hashmap *map;
 
-	fprintf(stderr, "%s: ", __func__);
-
 	map = hashmap__new(hash_fn, equal_fn, NULL);
-	if (CHECK(IS_ERR(map), "failed to create map: %ld\n", PTR_ERR(map)))
-		return 1;
+	if (CHECK(IS_ERR(map), "hashmap__new",
+		  "failed to create map: %ld\n", PTR_ERR(map)))
+		return;
 
 	for (i = 0; i < ELEM_CNT; i++) {
 		const void *oldk, *k = (const void *)(long)i;
 		void *oldv, *v = (void *)(long)(1024 + i);
 
 		err = hashmap__update(map, k, v, &oldk, &oldv);
-		if (CHECK(err != -ENOENT, "unexpected result: %d\n", err))
-			return 1;
+		if (CHECK(err != -ENOENT, "hashmap__update",
+			  "unexpected result: %d\n", err))
+			goto cleanup;
 
 		if (i % 2) {
 			err = hashmap__add(map, k, v);
 		} else {
 			err = hashmap__set(map, k, v, &oldk, &oldv);
-			if (CHECK(oldk != NULL || oldv != NULL,
+			if (CHECK(oldk != NULL || oldv != NULL, "check_kv",
 				  "unexpected k/v: %p=%p\n", oldk, oldv))
-				return 1;
+				goto cleanup;
 		}
 
-		if (CHECK(err, "failed to add k/v %ld = %ld: %d\n",
+		if (CHECK(err, "elem_add", "failed to add k/v %ld = %ld: %d\n",
 			       (long)k, (long)v, err))
-			return 1;
+			goto cleanup;
 
-		if (CHECK(!hashmap__find(map, k, &oldv),
+		if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
 			  "failed to find key %ld\n", (long)k))
-			return 1;
-		if (CHECK(oldv != v, "found value is wrong: %ld\n", (long)oldv))
-			return 1;
+			goto cleanup;
+		if (CHECK(oldv != v, "elem_val",
+			  "found value is wrong: %ld\n", (long)oldv))
+			goto cleanup;
 	}
 
-	if (CHECK(hashmap__size(map) != ELEM_CNT,
+	if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
 		  "invalid map size: %zu\n", hashmap__size(map)))
-		return 1;
+		goto cleanup;
 	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
+		  "hashmap_cap",
 		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
-		return 1;
+		goto cleanup;
 
 	found_msk = 0;
 	hashmap__for_each_entry(map, entry, bkt) {
@@ -103,42 +96,47 @@ int test_hashmap_generic(void)
 		long v = (long)entry->value;
 
 		found_msk |= 1ULL << k;
-		if (CHECK(v - k != 1024, "invalid k/v pair: %ld = %ld\n", k, v))
-			return 1;
+		if (CHECK(v - k != 1024, "check_kv",
+			  "invalid k/v pair: %ld = %ld\n", k, v))
+			goto cleanup;
 	}
-	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1,
+	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
 		  "not all keys iterated: %llx\n", found_msk))
-		return 1;
+		goto cleanup;
 
 	for (i = 0; i < ELEM_CNT; i++) {
 		const void *oldk, *k = (const void *)(long)i;
 		void *oldv, *v = (void *)(long)(256 + i);
 
 		err = hashmap__add(map, k, v);
-		if (CHECK(err != -EEXIST, "unexpected add result: %d\n", err))
-			return 1;
+		if (CHECK(err != -EEXIST, "hashmap__add",
+			  "unexpected add result: %d\n", err))
+			goto cleanup;
 
 		if (i % 2)
 			err = hashmap__update(map, k, v, &oldk, &oldv);
 		else
 			err = hashmap__set(map, k, v, &oldk, &oldv);
 
-		if (CHECK(err, "failed to update k/v %ld = %ld: %d\n",
-			       (long)k, (long)v, err))
-			return 1;
-		if (CHECK(!hashmap__find(map, k, &oldv),
+		if (CHECK(err, "elem_upd",
+			  "failed to update k/v %ld = %ld: %d\n",
+			  (long)k, (long)v, err))
+			goto cleanup;
+		if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
 			  "failed to find key %ld\n", (long)k))
-			return 1;
-		if (CHECK(oldv != v, "found value is wrong: %ld\n", (long)oldv))
-			return 1;
+			goto cleanup;
+		if (CHECK(oldv != v, "elem_val",
+			  "found value is wrong: %ld\n", (long)oldv))
+			goto cleanup;
 	}
 
-	if (CHECK(hashmap__size(map) != ELEM_CNT,
+	if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
 		  "invalid updated map size: %zu\n", hashmap__size(map)))
-		return 1;
+		goto cleanup;
 	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
+		  "hashmap__capacity",
 		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
-		return 1;
+		goto cleanup;
 
 	found_msk = 0;
 	hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
@@ -146,20 +144,21 @@ int test_hashmap_generic(void)
 		long v = (long)entry->value;
 
 		found_msk |= 1ULL << k;
-		if (CHECK(v - k != 256,
+		if (CHECK(v - k != 256, "elem_check",
 			  "invalid updated k/v pair: %ld = %ld\n", k, v))
-			return 1;
+			goto cleanup;
 	}
-	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1,
+	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
 		  "not all keys iterated after update: %llx\n", found_msk))
-		return 1;
+		goto cleanup;
 
 	found_cnt = 0;
 	hashmap__for_each_key_entry(map, entry, (void *)0) {
 		found_cnt++;
 	}
-	if (CHECK(!found_cnt, "didn't find any entries for key 0\n"))
-		return 1;
+	if (CHECK(!found_cnt, "found_cnt",
+		  "didn't find any entries for key 0\n"))
+		goto cleanup;
 
 	found_msk = 0;
 	found_cnt = 0;
@@ -173,30 +172,31 @@ int test_hashmap_generic(void)
 		found_cnt++;
 		found_msk |= 1ULL << (long)k;
 
-		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv),
+		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
 			  "failed to delete k/v %ld = %ld\n",
 			  (long)k, (long)v))
-			return 1;
-		if (CHECK(oldk != k || oldv != v,
+			goto cleanup;
+		if (CHECK(oldk != k || oldv != v, "check_old",
 			  "invalid deleted k/v: expected %ld = %ld, got %ld = %ld\n",
 			  (long)k, (long)v, (long)oldk, (long)oldv))
-			return 1;
-		if (CHECK(hashmap__delete(map, k, &oldk, &oldv),
+			goto cleanup;
+		if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
 			  "unexpectedly deleted k/v %ld = %ld\n",
 			  (long)oldk, (long)oldv))
-			return 1;
+			goto cleanup;
 	}
 
-	if (CHECK(!found_cnt || !found_msk,
+	if (CHECK(!found_cnt || !found_msk, "found_entries",
 		  "didn't delete any key entries\n"))
-		return 1;
-	if (CHECK(hashmap__size(map) != ELEM_CNT - found_cnt,
+		goto cleanup;
+	if (CHECK(hashmap__size(map) != ELEM_CNT - found_cnt, "elem_cnt",
 		  "invalid updated map size (already deleted: %d): %zu\n",
 		  found_cnt, hashmap__size(map)))
-		return 1;
+		goto cleanup;
 	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
+		  "hashmap__capacity",
 		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
-		return 1;
+		goto cleanup;
 
 	hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
 		const void *oldk, *k;
@@ -208,53 +208,56 @@ int test_hashmap_generic(void)
 		found_cnt++;
 		found_msk |= 1ULL << (long)k;
 
-		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv),
+		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
 			  "failed to delete k/v %ld = %ld\n",
 			  (long)k, (long)v))
-			return 1;
-		if (CHECK(oldk != k || oldv != v,
+			goto cleanup;
+		if (CHECK(oldk != k || oldv != v, "elem_check",
 			  "invalid old k/v: expect %ld = %ld, got %ld = %ld\n",
 			  (long)k, (long)v, (long)oldk, (long)oldv))
-			return 1;
-		if (CHECK(hashmap__delete(map, k, &oldk, &oldv),
+			goto cleanup;
+		if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
 			  "unexpectedly deleted k/v %ld = %ld\n",
 			  (long)k, (long)v))
-			return 1;
+			goto cleanup;
 	}
 
 	if (CHECK(found_cnt != ELEM_CNT || found_msk != (1ULL << ELEM_CNT) - 1,
+		  "found_cnt",
 		  "not all keys were deleted: found_cnt:%d, found_msk:%llx\n",
 		  found_cnt, found_msk))
-		return 1;
-	if (CHECK(hashmap__size(map) != 0,
+		goto cleanup;
+	if (CHECK(hashmap__size(map) != 0, "hashmap__size",
 		  "invalid updated map size (already deleted: %d): %zu\n",
 		  found_cnt, hashmap__size(map)))
-		return 1;
+		goto cleanup;
 
 	found_cnt = 0;
 	hashmap__for_each_entry(map, entry, bkt) {
-		CHECK(false, "unexpected map entries left: %ld = %ld\n",
-			     (long)entry->key, (long)entry->value);
-		return 1;
+		CHECK(false, "elem_exists",
+		      "unexpected map entries left: %ld = %ld\n",
+		      (long)entry->key, (long)entry->value);
+		goto cleanup;
 	}
 
-	hashmap__free(map);
+	hashmap__clear(map);
 	hashmap__for_each_entry(map, entry, bkt) {
-		CHECK(false, "unexpected map entries left: %ld = %ld\n",
-			     (long)entry->key, (long)entry->value);
-		return 1;
+		CHECK(false, "elem_exists",
+		      "unexpected map entries left: %ld = %ld\n",
+		      (long)entry->key, (long)entry->value);
+		goto cleanup;
 	}
 
-	fprintf(stderr, "OK\n");
-	return 0;
+cleanup:
+	hashmap__free(map);
 }
 
-size_t collision_hash_fn(const void *k, void *ctx)
+static size_t collision_hash_fn(const void *k, void *ctx)
 {
 	return 0;
 }
 
-int test_hashmap_multimap(void)
+static void test_hashmap_multimap(void)
 {
 	void *k1 = (void *)0, *k2 = (void *)1;
 	struct hashmap_entry *entry;
@@ -262,121 +265,116 @@ int test_hashmap_multimap(void)
 	long found_msk;
 	int err, bkt;
 
-	fprintf(stderr, "%s: ", __func__);
-
 	/* force collisions */
 	map = hashmap__new(collision_hash_fn, equal_fn, NULL);
-	if (CHECK(IS_ERR(map), "failed to create map: %ld\n", PTR_ERR(map)))
-		return 1;
-
+	if (CHECK(IS_ERR(map), "hashmap__new",
+		  "failed to create map: %ld\n", PTR_ERR(map)))
+		return;
 
 	/* set up multimap:
 	 * [0] -> 1, 2, 4;
 	 * [1] -> 8, 16, 32;
 	 */
 	err = hashmap__append(map, k1, (void *)1);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 	err = hashmap__append(map, k1, (void *)2);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 	err = hashmap__append(map, k1, (void *)4);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 
 	err = hashmap__append(map, k2, (void *)8);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 	err = hashmap__append(map, k2, (void *)16);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 	err = hashmap__append(map, k2, (void *)32);
-	if (CHECK(err, "failed to add k/v: %d\n", err))
-		return 1;
+	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
+		goto cleanup;
 
-	if (CHECK(hashmap__size(map) != 6,
+	if (CHECK(hashmap__size(map) != 6, "hashmap_size",
 		  "invalid map size: %zu\n", hashmap__size(map)))
-		return 1;
+		goto cleanup;
 
 	/* verify global iteration still works and sees all values */
 	found_msk = 0;
 	hashmap__for_each_entry(map, entry, bkt) {
 		found_msk |= (long)entry->value;
 	}
-	if (CHECK(found_msk != (1 << 6) - 1,
+	if (CHECK(found_msk != (1 << 6) - 1, "found_msk",
 		  "not all keys iterated: %lx\n", found_msk))
-		return 1;
+		goto cleanup;
 
 	/* iterate values for key 1 */
 	found_msk = 0;
 	hashmap__for_each_key_entry(map, entry, k1) {
 		found_msk |= (long)entry->value;
 	}
-	if (CHECK(found_msk != (1 | 2 | 4),
+	if (CHECK(found_msk != (1 | 2 | 4), "found_msk",
 		  "invalid k1 values: %lx\n", found_msk))
-		return 1;
+		goto cleanup;
 
 	/* iterate values for key 2 */
 	found_msk = 0;
 	hashmap__for_each_key_entry(map, entry, k2) {
 		found_msk |= (long)entry->value;
 	}
-	if (CHECK(found_msk != (8 | 16 | 32),
+	if (CHECK(found_msk != (8 | 16 | 32), "found_msk",
 		  "invalid k2 values: %lx\n", found_msk))
-		return 1;
+		goto cleanup;
 
-	fprintf(stderr, "OK\n");
-	return 0;
+cleanup:
+	hashmap__free(map);
 }
 
-int test_hashmap_empty()
+static void test_hashmap_empty()
 {
 	struct hashmap_entry *entry;
 	int bkt;
 	struct hashmap *map;
 	void *k = (void *)0;
 
-	fprintf(stderr, "%s: ", __func__);
-
 	/* force collisions */
 	map = hashmap__new(hash_fn, equal_fn, NULL);
-	if (CHECK(IS_ERR(map), "failed to create map: %ld\n", PTR_ERR(map)))
-		return 1;
+	if (CHECK(IS_ERR(map), "hashmap__new",
+		  "failed to create map: %ld\n", PTR_ERR(map)))
+		goto cleanup;
 
-	if (CHECK(hashmap__size(map) != 0,
+	if (CHECK(hashmap__size(map) != 0, "hashmap__size",
 		  "invalid map size: %zu\n", hashmap__size(map)))
-		return 1;
-	if (CHECK(hashmap__capacity(map) != 0,
+		goto cleanup;
+	if (CHECK(hashmap__capacity(map) != 0, "hashmap__capacity",
 		  "invalid map capacity: %zu\n", hashmap__capacity(map)))
-		return 1;
-	if (CHECK(hashmap__find(map, k, NULL), "unexpected find\n"))
-		return 1;
-	if (CHECK(hashmap__delete(map, k, NULL, NULL), "unexpected delete\n"))
-		return 1;
+		goto cleanup;
+	if (CHECK(hashmap__find(map, k, NULL), "elem_find",
+		  "unexpected find\n"))
+		goto cleanup;
+	if (CHECK(hashmap__delete(map, k, NULL, NULL), "elem_del",
+		  "unexpected delete\n"))
+		goto cleanup;
 
 	hashmap__for_each_entry(map, entry, bkt) {
-		CHECK(false, "unexpected iterated entry\n");
-		return 1;
+		CHECK(false, "elem_found", "unexpected iterated entry\n");
+		goto cleanup;
 	}
 	hashmap__for_each_key_entry(map, entry, k) {
-		CHECK(false, "unexpected key entry\n");
-		return 1;
+		CHECK(false, "key_found", "unexpected key entry\n");
+		goto cleanup;
 	}
 
-	fprintf(stderr, "OK\n");
-	return 0;
+cleanup:
+	hashmap__free(map);
 }
 
-int main(int argc, char **argv)
+void test_hashmap()
 {
-	bool failed = false;
-
-	if (test_hashmap_generic())
-		failed = true;
-	if (test_hashmap_multimap())
-		failed = true;
-	if (test_hashmap_empty())
-		failed = true;
-
-	return failed;
+	if (test__start_subtest("generic"))
+		test_hashmap_generic();
+	if (test__start_subtest("multimap"))
+		test_hashmap_multimap();
+	if (test__start_subtest("empty"))
+		test_hashmap_empty();
 }

tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c

@@ -80,9 +80,6 @@ void test_ns_current_pid_tgid(void)
 		  "User pid/tgid %llu BPF pid/tgid %llu\n", id, bss.pid_tgid))
 		goto cleanup;
 cleanup:
-	if (!link) {
-		bpf_link__destroy(link);
-		link = NULL;
-	}
+	bpf_link__destroy(link);
 	bpf_object__close(obj);
 }

tools/testing/selftests/bpf/prog_tests/perf_buffer.c

@@ -6,6 +6,11 @@
 #include <test_progs.h>
 #include "bpf/libbpf_internal.h"
 
+/* AddressSanitizer sometimes crashes due to data dereference below, due to
+ * this being mmap()'ed memory. Disable instrumentation with
+ * no_sanitize_address attribute
+ */
+__attribute__((no_sanitize_address))
 static void on_sample(void *ctx, int cpu, void *data, __u32 size)
 {
 	int cpu_data = *(int *)data, duration = 0;

tools/testing/selftests/bpf/test_progs.c

@@ -351,6 +351,7 @@ int extract_build_id(char *build_id, size_t size)
 		len = size;
 	memcpy(build_id, line, len);
 	build_id[len] = '\0';
+	free(line);
 	return 0;
 err:
 	fclose(fp);
@@ -420,6 +421,18 @@ static int libbpf_print_fn(enum libbpf_print_level level,
 	return 0;
 }
 
+static void free_str_set(const struct str_set *set)
+{
+	int i;
+
+	if (!set)
+		return;
+
+	for (i = 0; i < set->cnt; i++)
+		free((void *)set->strs[i]);
+	free(set->strs);
+}
+
 static int parse_str_list(const char *s, struct str_set *set)
 {
 	char *input, *state = NULL, *next, **tmp, **strs = NULL;
@@ -756,11 +769,11 @@ int main(int argc, char **argv)
 	fprintf(stdout, "Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n",
 		env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt);
 
-	free(env.test_selector.blacklist.strs);
-	free(env.test_selector.whitelist.strs);
+	free_str_set(&env.test_selector.blacklist);
+	free_str_set(&env.test_selector.whitelist);
 	free(env.test_selector.num_set);
-	free(env.subtest_selector.blacklist.strs);
-	free(env.subtest_selector.whitelist.strs);
+	free_str_set(&env.subtest_selector.blacklist);
+	free_str_set(&env.subtest_selector.whitelist);
 	free(env.subtest_selector.num_set);
 
 	return env.fail_cnt ? EXIT_FAILURE : EXIT_SUCCESS;