Messages in this thread Patch in this message | | | From | zhanggenjian <> | Subject | [PATCH v2] net: ipv4: Avoid bounds check warning | Date | Thu, 26 May 2022 18:12:13 +0800 |
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From: huhai <huhai@kylinos.cn>
Fix the following build warning when CONFIG_IPV6 is not set:
In function ‘fortify_memcpy_chk’, inlined from ‘tcp_md5_do_add’ at net/ipv4/tcp_ipv4.c:1210:2: ./include/linux/fortify-string.h:328:4: error: call to ‘__write_overflow_field’ declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning] 328 | __write_overflow_field(p_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: huhai <huhai@kylinos.cn> --- net/ipv4/tcp_ipv4.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 457f5b5d5d4a..46ae9d535086 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1208,8 +1208,8 @@ int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr, key->l3index = l3index; key->flags = flags; memcpy(&key->addr, addr, - (family == AF_INET6) ? sizeof(struct in6_addr) : - sizeof(struct in_addr)); + (IS_ENABLED(CONFIG_IPV6) && family == AF_INET6) ? sizeof(struct in6_addr) : + sizeof(struct in_addr)); hlist_add_head_rcu(&key->node, &md5sig->head); return 0; } -- 2.27.0
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