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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , David Ahern Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Breno Leitao X-Mailer: b4 0.15-dev-42535 X-Developer-Signature: v=1; a=openpgp-sha256; l=966; i=leitao@debian.org; h=from:subject:message-id; bh=YhXmralQOtAPpYDtC4QwLXoEtDNTsD8hV9YQs3fVBoM=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBn+UrUUCGu1LDut+UaNrtqlswKL4aFTKq9Ls2Qs NvyAR0D1nuJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCZ/lK1AAKCRA1o5Of/Hh3 bRvVD/9lZM0pCx3p9i+vy5r1f7yyO7KCNWYqTvo2IMwJxeBXEILHy5fV62MEMjCCdtP9BYpaum8 qEKQhGOFqw69n92o5cHE7Qo0MfXOMu0IOgGqgGDDHBlQqN9Bk6J2pakOnakCW+FAe5UhoN9FbtB 4zp76kP4NImKZ+agzooBQjampKVpzcY6HYx3obWp3iEABCUDWz6M5lsmBPJtAhMCP76KgZO07Mo rsoVRkYW1uC5EZj7hPxeJuSzCnUzW899ISd0gd3MGVlxycvIri+3r3zJg2XYqRnCe+jUwwthTfP /6zaAVCssHpIdjKXx9TOdO4H5dsE+pT1xYnOLc4uiuehCa6ypURii/AmrV0ejNSYp2D8kO/Hjm2 J34Vf+BnQIeJ8b45e1pUfcyLly+g44Ff252+4BlCm25Euu0qrHXrRnntNiZo3qT76ueYepsWC6t 7iOU0caFnWt+mTY/ZqJUtRSb5KlE4GwpJNFZ9ntvdypNnW6ztQl/uL/J1d+lFrQffnneKPhMmwI C4GJ/wEJ4dLgH6XRKzukhSQkd68sS8mvuAb63lQ9gMS2WqoDL74HpVm3G9XFHNO3G4SxQFzGPIG xlhsqg0JUfh+QLblWhmEe3uN+dsxllhUHZJmgipg3yz/okNj3U7z5pKCHVHbRvG9NEL24FNLbLV gmpKZtxqhRyszMw== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D Leverage the new nlmsg_payload() helper to avoid checking for message size and then reading the nlmsg data. Signed-off-by: Breno Leitao Reviewed-by: Kuniyuki Iwashima --- net/ipv6/addrconf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 9ba83f0c99283..a9aeb949d9c8e 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -5346,12 +5346,12 @@ static int inet6_valid_dump_ifaddr_req(const struct= nlmsghdr *nlh, struct ifaddrmsg *ifm; int err, i; =20 - if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { + ifm =3D nlmsg_payload(nlh, sizeof(*ifm)); + if (!ifm) { NL_SET_ERR_MSG_MOD(extack, "Invalid header for address dump request"); return -EINVAL; } =20 - ifm =3D nlmsg_data(nlh); if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) { NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for address dump re= quest"); return -EINVAL; --=20 2.47.1