From: Nathan Chancellor Date: Tue, 15 Jul 2025 23:15:40 +0000 (-0700) Subject: phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() X-Git-Tag: v6.16-rc7~37^2~11 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=17ba793f381eb813596d6de1cc6820bcbda5ed8b;p=thirdparty%2Flinux.git phonet/pep: Move call to pn_skb_get_dst_sockaddr() earlier in pep_sock_accept() A new warning in clang [1] points out a place in pep_sock_accept() where dst is uninitialized then passed as a const pointer to pep_find_pipe(): net/phonet/pep.c:829:37: error: variable 'dst' is uninitialized when passed as a const pointer argument here [-Werror,-Wuninitialized-const-pointer] 829 | newsk = pep_find_pipe(&pn->hlist, &dst, pipe_handle); | ^~~: Move the call to pn_skb_get_dst_sockaddr(), which initializes dst, to before the call to pep_find_pipe(), so that dst is consistently used initialized throughout the function. Cc: stable@vger.kernel.org Fixes: f7ae8d59f661 ("Phonet: allocate sock from accept syscall rather than soft IRQ") Link: https://github.com/llvm/llvm-project/commit/00dacf8c22f065cb52efb14cd091d441f19b319e [1] Closes: https://github.com/ClangBuiltLinux/linux/issues/2101 Signed-off-by: Nathan Chancellor Link: https://patch.msgid.link/20250715-net-phonet-fix-uninit-const-pointer-v1-1-8efd1bd188b3@kernel.org Signed-off-by: Jakub Kicinski --- diff --git a/net/phonet/pep.c b/net/phonet/pep.c index 53a858478e22f..62527e1ebb883 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -826,6 +826,7 @@ static struct sock *pep_sock_accept(struct sock *sk, } /* Check for duplicate pipe handle */ + pn_skb_get_dst_sockaddr(skb, &dst); newsk = pep_find_pipe(&pn->hlist, &dst, pipe_handle); if (unlikely(newsk)) { __sock_put(newsk); @@ -850,7 +851,6 @@ static struct sock *pep_sock_accept(struct sock *sk, newsk->sk_destruct = pipe_destruct; newpn = pep_sk(newsk); - pn_skb_get_dst_sockaddr(skb, &dst); pn_skb_get_src_sockaddr(skb, &src); newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst); newpn->pn_sk.dobject = pn_sockaddr_get_object(&src);