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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=1765; i=leitao@debian.org; h=from:subject:message-id; bh=HSZz/J8OsLYjC/ROSdHcxkLp0rgmkS70ZHME3CFezHQ=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBn+UrTzzQv83IpkzISdlIEZ6glS37soFKNHoSH2 thhYBquqRuJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCZ/lK0wAKCRA1o5Of/Hh3 bTacD/47YliauK/dfacgUku5bKARkLozY4Q4UUDihtSOHodOyckyzjrB4JS8+2B0y2kkWDXHA+V j1/r4E18vpgxCTC9VO1Rdb+WnFUt0T3x+6ww2ytCSWz1C/TOsiJ3O+hUPO0bxFoQvOaOKGTlV7k WG01p0yQjRYZjfgfaX1CoDZ3pE8hDtbjGIWR2vOFtLzc9d4CXR1Os0S+MRlE0hCZI1GjGvUt6wR AgJyTrALKVMDZEpPaYfcx2D182/dtaPnAA9n8JaUkruqNSEJWUdx2GzqapmVi1ynCIbCprjuOu0 qaDA29NorwVAAum6e/XD5pgHvLqZTddwBgWGiqPgmUXN79X/+cNxBSpbBs/KqY9joECM4o+ohku xeWDfB8xzdyrH4AHpICx/A9QrvvV+AmoEIADqbhyTBcveUR4Wn289AuGW/92mQJxDq4V7F6Ui4S +HdNNjemtU3LMqyVZ7iU8Thqxaw8JZH3XMvPXJY2l/8g83AgvmTHtF/qBmUe/K7fgMmNT19D1KI h4zZC8tbNDVeVAAk976L1gfOptBhjY1VLriXbQEeiy9cpzD1gKrLhPaS7aTEI/ecZOAIXnQNaRL MiHwDez5YC9/UNKnuefN15zPOLClQTRLI/TECPEVJ2v/J2IaX9jTtL6HBQhGlpzlE4+SD/oyE5p Lg8smjiSJgmVIxg== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D In the current codebase, there are multiple instances where the structure size is checked before assigning it to a Netlink message. This check is crucial for ensuring that the structure is correctly mapped onto the Netlink message, providing a layer of security. To streamline this process, Jakub Kicinski suggested creating a helper function, `nlmsg_payload`, which verifies if the structure fits within the message. If it does, the function returns the data; otherwise, it returns NULL. This approach simplifies the code and reduces redundancy. This patchset introduces the `nlmsg_payload` helper and updates several parts of the code to use it. Further updates will follow in subsequent patchsets. Signed-off-by: Breno Leitao --- Breno Leitao (9): netlink: Introduce nlmsg_payload helper neighbour: Use nlmsg_payload in neightbl_valid_dump_info neighbour: Use nlmsg_payload in neigh_valid_get_req rtnetlink: Use nlmsg_payload in valid_fdb_dump_strict mpls: Use nlmsg_payload in mpls_valid_fib_dump_req ipv6: Use nlmsg_payload in inet6_valid_dump_ifaddr_req ipv6: Use nlmsg_payload in inet6_rtm_valid_getaddr_req mpls: Use nlmsg_payload in mpls_valid_getroute_req net: fib_rules: Use nlmsg_payload in fib_valid_dumprule_req include/net/netlink.h | 13 +++++++++++++ net/core/fib_rules.c | 4 ++-- net/core/neighbour.c | 8 ++++---- net/core/rtnetlink.c | 4 ++-- net/ipv6/addrconf.c | 8 ++++---- net/mpls/af_mpls.c | 8 ++++---- 6 files changed, 29 insertions(+), 16 deletions(-) --- base-commit: 0c49baf099ba2147a6ff3bbdc3197c6ddbee5469 change-id: 20250411-nlmsg-2dd8c30ba35c Best regards, -- Breno Leitao