[PATCH] selftests/bpf: Fix null pointer check in skb_pkt_end.c

[Prabhav Kumar Vaish]

Ensure that 'tcp' is checked for NULL before dereferencing. This resolves
a potential null pointer dereference warning reported by static analysis.

Signed-off-by: Prabhav Kumar Vaish <pvkumar5749...@gmail.com>
---
 tools/testing/selftests/bpf/progs/skb_pkt_end.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/skb_pkt_end.c 
b/tools/testing/selftests/bpf/progs/skb_pkt_end.c
index 3bb4451524a1..db33ff2839f7 100644
--- a/tools/testing/selftests/bpf/progs/skb_pkt_end.c
+++ b/tools/testing/selftests/bpf/progs/skb_pkt_end.c
@@ -45,10 +45,10 @@ int main_prog(struct __sk_buff *skb)
                goto out;
 
        tcp = (void*)(ip + 1);
-       if (tcp->dest != 0)
-               goto out;
        if (!tcp)
                goto out;
+       if (tcp->dest != 0)
+               goto out;
 
        urg_ptr = tcp->urg_ptr;
 
-- 
2.34.1