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Message-ID: <202211171422.7A7A7A9@keescook>
Date: Thu, 17 Nov 2022 14:22:34 -0800
From: coverity-bot <keescook@...omium.org>
To: Eric Dumazet <edumazet@...gle.com>
Cc: linux-kernel@...r.kernel.org,
Marc Kleine-Budde <mkl@...gutronix.de>,
Paolo Abeni <pabeni@...hat.com>,
Stefano Garzarella <sgarzare@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Nikolay Aleksandrov <nikolay@...dia.com>,
"David S. Miller" <davem@...emloft.net>,
Florian Fainelli <f.fainelli@...il.com>,
netdev@...r.kernel.org,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: __sock_gen_cookie(): Error handling issues
Hello!
This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221117 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan
You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:
Wed Nov 16 12:42:01 2022 +0000
4ebf802cf1c6 ("net: __sock_gen_cookie() cleanup")
Coverity reported the following:
*** CID 1527347: Error handling issues (CHECKED_RETURN)
net/core/sock_diag.c:33 in __sock_gen_cookie()
27 {
28 u64 res = atomic64_read(&sk->sk_cookie);
29
30 if (!res) {
31 u64 new = gen_cookie_next(&sock_cookie);
32
vvv CID 1527347: Error handling issues (CHECKED_RETURN)
vvv Calling "atomic64_try_cmpxchg" without checking return value (as is done elsewhere 8 out of 9 times).
33 atomic64_try_cmpxchg(&sk->sk_cookie, &res, new);
34 }
35 return res;
36 }
37
38 int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie)
If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):
Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527347 ("Error handling issues")
Fixes: 4ebf802cf1c6 ("net: __sock_gen_cookie() cleanup")
Thanks for your attention!
--
Coverity-bot
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