Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2020-08-28

The following pull-request contains BPF updates for your *net* tree.

We've added 4 non-merge commits during the last 4 day(s) which contain
a total of 4 files changed, 7 insertions(+), 4 deletions(-).

The main changes are:

1) Fix out of bounds access for BPF_OBJ_GET_INFO_BY_FD retrieval, from Yonghong Song.

2) Fix wrong __user annotation in bpf_stats sysctl handler, from Tobias Klauser.

3) Few fixes for BPF selftest scripting in test_{progs,maps}, from Jesper Dangaard Brouer.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

kernel/bpf/syscall.c

@@ -2634,7 +2634,7 @@ static int bpf_raw_tp_link_fill_link_info(const struct bpf_link *link,
 	u32 ulen = info->raw_tracepoint.tp_name_len;
 	size_t tp_len = strlen(tp_name);
 
-	if (ulen && !ubuf)
+	if (!ulen ^ !ubuf)
 		return -EINVAL;
 
 	info->raw_tracepoint.tp_name_len = tp_len + 1;

kernel/sysctl.c

@@ -204,8 +204,7 @@ static int max_extfrag_threshold = 1000;
 
 #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL)
 static int bpf_stats_handler(struct ctl_table *table, int write,
-			     void __user *buffer, size_t *lenp,
-			     loff_t *ppos)
+			     void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct static_key *key = (struct static_key *)table->data;
 	static int saved_val;

tools/testing/selftests/bpf/test_maps.c

@@ -1274,6 +1274,8 @@ static void __run_parallel(unsigned int tasks,
 	pid_t pid[tasks];
 	int i;
 
+	fflush(stdout);
+
 	for (i = 0; i < tasks; i++) {
 		pid[i] = fork();
 		if (pid[i] == 0) {

tools/testing/selftests/bpf/test_progs.c

@@ -618,7 +618,9 @@ int cd_flavor_subdir(const char *exec_name)
 	if (!flavor)
 		return 0;
 	flavor++;
+	if (env.verbosity > VERBOSE_NONE)
 		fprintf(stdout,	"Switching to flavor '%s' subdirectory...\n", flavor);
+
 	return chdir(flavor);
 }