From: Jiri Olsa <jolsa@redhat.com>
Date: Wed, 21 Jul 2021 23:58:08 +0200
Subject: libbpf: Fix func leak in attach_kprobe
Patch-mainline: v5.15-rc1
Git-commit: 1f71a468a75ff4f13c55966c74284aa4a6bcc334
References: jsc#PED-1377

Add missing free() for func pointer in attach_kprobe function.

Fixes: a2488b5f483f ("libbpf: Allow specification of "kprobe/function+offset"")
Reported-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/20210721215810.889975-2-jolsa@kernel.org
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 tools/lib/bpf/libbpf.c |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -10431,6 +10431,7 @@ static struct bpf_link *attach_kprobe(co
 		return libbpf_err_ptr(err);
 	}
 	if (opts.retprobe && offset != 0) {
+		free(func);
 		err = -EINVAL;
 		pr_warn("kretprobes do not support offset specification\n");
 		return libbpf_err_ptr(err);