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Date: Thu, 14 May 2020 14:51:36 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: "Jason A. Donenfeld" <Jason@...c4.com>, Arnd Bergmann <arnd@...db.de>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, wireguard@...ts.zx2c4.com, netdev@...r.kernel.org, clang-built-linux@...glegroups.com Subject: [PATCH AUTOSEL 5.6 51/62] wireguard: selftests: initalize ipv6 members to NULL to squelch clang warning From: "Jason A. Donenfeld" <Jason@...c4.com> [ Upstream commit 4fed818ef54b08d4b29200e416cce65546ad5312 ] Without setting these to NULL, clang complains in certain configurations that have CONFIG_IPV6=n: In file included from drivers/net/wireguard/ratelimiter.c:223: drivers/net/wireguard/selftest/ratelimiter.c:173:34: error: variable 'skb6' is uninitialized when used here [-Werror,-Wuninitialized] ret = timings_test(skb4, hdr4, skb6, hdr6, &test_count); ^~~~ drivers/net/wireguard/selftest/ratelimiter.c:123:29: note: initialize the variable 'skb6' to silence this warning struct sk_buff *skb4, *skb6; ^ = NULL drivers/net/wireguard/selftest/ratelimiter.c:173:40: error: variable 'hdr6' is uninitialized when used here [-Werror,-Wuninitialized] ret = timings_test(skb4, hdr4, skb6, hdr6, &test_count); ^~~~ drivers/net/wireguard/selftest/ratelimiter.c:125:22: note: initialize the variable 'hdr6' to silence this warning struct ipv6hdr *hdr6; ^ We silence this warning by setting the variables to NULL as the warning suggests. Reported-by: Arnd Bergmann <arnd@...db.de> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/wireguard/selftest/ratelimiter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireguard/selftest/ratelimiter.c b/drivers/net/wireguard/selftest/ratelimiter.c index bcd6462e45401..007cd4457c5f6 100644 --- a/drivers/net/wireguard/selftest/ratelimiter.c +++ b/drivers/net/wireguard/selftest/ratelimiter.c @@ -120,9 +120,9 @@ bool __init wg_ratelimiter_selftest(void) enum { TRIALS_BEFORE_GIVING_UP = 5000 }; bool success = false; int test = 0, trials; - struct sk_buff *skb4, *skb6; + struct sk_buff *skb4, *skb6 = NULL; struct iphdr *hdr4; - struct ipv6hdr *hdr6; + struct ipv6hdr *hdr6 = NULL; if (IS_ENABLED(CONFIG_KASAN) || IS_ENABLED(CONFIG_UBSAN)) return true; -- 2.20.1
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