From: Martin KaFai Lau Date: Tue, 11 Feb 2020 17:59:10 +0000 (-0800) Subject: selftests/bpf: Fix error checking on reading the tcp_fastopen sysctl X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2fe77100553f3ac6b2105db8ae14b5ea4b43c108;p=linux.git selftests/bpf: Fix error checking on reading the tcp_fastopen sysctl There is a typo in checking the "saved_tcp_fo" and instead "saved_tcp_syncookie" is checked again. This patch fixes it and also breaks them into separate if statements such that the test will abort asap. Reported-by: David Binderman Signed-off-by: Martin KaFai Lau Signed-off-by: Daniel Borkmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20200211175910.3235321-1-kafai@fb.com --- diff --git a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c index 098bcae5f827e..b577666d028e1 100644 --- a/tools/testing/selftests/bpf/prog_tests/select_reuseport.c +++ b/tools/testing/selftests/bpf/prog_tests/select_reuseport.c @@ -822,8 +822,10 @@ void test_select_reuseport(void) goto out; saved_tcp_fo = read_int_sysctl(TCP_FO_SYSCTL); + if (saved_tcp_fo < 0) + goto out; saved_tcp_syncookie = read_int_sysctl(TCP_SYNCOOKIE_SYSCTL); - if (saved_tcp_syncookie < 0 || saved_tcp_syncookie < 0) + if (saved_tcp_syncookie < 0) goto out; if (enable_fastopen())