[PATCH bpf-next 2/2] libbpf: fix legacy kprobe event creation FD error handling

[Andrii Nakryiko <andrii@xxxxxxxxxx>]

open() returns -1 on error, not zero FD. Fix the error handling logic.
Reported by Coverity statis analysis.

Fixes: ca304b40c20d ("libbpf: Introduce legacy kprobe events support")
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 6d2f12db6034..761497be6ffc 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -9036,7 +9036,7 @@ static int poke_kprobe_events(bool add, const char *name, bool retprobe, uint64_
 	}
 
 	fd = open(file, O_WRONLY | O_APPEND, 0);
-	if (!fd)
+	if (fd < 0)
 		return -errno;
 	ret = write(fd, cmd, strlen(cmd));
 	if (ret < 0)
-- 
2.30.2