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AKwUvBzVXamlFx1PxwDX02JKVhrFmSx3M6Wguy0Tqzh6AtSZ1v9ne4L7oE9kPo6D4j6s1cunpSL+CLpPdGmWpT0qCag=@lists.osuosl.org X-Gm-Message-State: AFuF++kP/vjK2LK1VhlSP5sGdDwS3mvbWcvUdSzRoJRCtD+FpuazJexC HD/0sBrcLRLMzLjztYhl870oTYKSWId6YUSU7vny++dHZ+Iz2ClTBE7zA0WRrbJkcoP9yTpKwxT 9 X-Received: from plrd12.prod.google.com ([2002:a17:902:aa8c:b0:2db:8b6a:31a7]) (user=morbo job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:388d:b0:2dd:143:d5 with SMTP id d9443c01a7336-2dd6c75a396mr155065525ad.22.1789460390543; Tue, 15 Sep 2026 01:19:50 -0700 (PDT) Date: Tue, 15 Sep 2026 08:18:19 +0000 In-Reply-To: <20260915081910.4142719-1-morbo@google.com> Mime-Version: 1.0 References: <20260915081910.4142719-1-morbo@google.com> X-Mailer: git-send-email 2.55.0.1032.g73a4cd73de-goog Message-ID: <20260915081910.4142719-3-morbo@google.com> Subject: [PATCH 02/28] sunrpc: Refactor rpc_sockaddr2uaddr() to use snprintf() instead of strlcat() From: Bill Wendling To: linux-kernel@vger.kernel.org Cc: Bill Wendling , codemender-patching+linux@google.com, Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Ian Abbott , H Hartley Sweeten , Tony Luck , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Matthew Brost , "=?UTF-8?q?Thomas=20Hellstr=C3=B6m?=" , Rodrigo Vivi , Dmitry Torokhov , Matthias Schwarzott , Mauro Carvalho Chehab , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Arend van Spriel , Rob Herring , Saravana Kannan , Krzysztof Kozlowski , Sylwester Nawrocki , Peter Griffin , Alim Akhtar , Linus Walleij , Anil Gurumurthy , Sudarsana Kalluru , "Martin K. Petersen" , Trond Myklebust , Anna Schumaker , Mike Marshall , Martin Brandenburg , Kees Cook , Jiri Pirko , Simon Horman , Chuck Lever , Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jaroslav Kysela , Takashi Iwai , Andrew Morton , "Mike Rapoport (Microsoft)" , Kanglong Wang , Tiezhu Yang , Qiang Ma , Randy Dunlap , Pengpeng Hou , Ard Biesheuvel , Breno Leitao , Thorsten Blum , Harshit Mogalapalli , Greg Kroah-Hartman , Lyude Paul , Ashutosh Desai , Imre Deak , Dmitry Baryshkov , Johan Hovold , Johannes Berg , Miri Korenblit , Alexander Stein , Cryolitia PukNgae , Jiaming Zhang , Will Porter , Cen Zhang , "=?UTF-8?q?C=C3=A1ssio=20Gabriel?=" , Rong Zhang , Arun Raghavan , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-edac@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nfs@vger.kernel.org, devel@lists.orangefs.org, linux-hardening@vger.kernel.org, linux-sound@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Tue, 15 Sep 2026 17:17:36 +0000 X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org rpc_sockaddr2uaddr() formats the IP address into "addrbuf", formats the port into a temporary "portbuf" buffer with snprintf(), and then appends "portbuf" to "addrbuf" using strlcat(). In preparation for removing the deprecated strlcat() API[1], capture the length returned by rpc_ntop4() and rpc_ntop6_noscopeid() and format the port directly onto the end of "addrbuf" with snprintf(). This eliminates the strlcat() call and the temporary "portbuf" buffer. Link: https://github.com/KSPP/linux/issues/370 [1] Cc: codemender-patching+linux@google.com Assisted-by: CoPilot:3.5-sonnet [editor_update_file, shell_command_run] Signed-off-by: Bill Wendling --- Cc: Russell King Cc: Huacai Chen Cc: WANG Xuerui Cc: Thomas Bogendoerfer Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: Ian Abbott Cc: H Hartley Sweeten Cc: Tony Luck Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Simona Vetter Cc: Matthew Brost Cc: "Thomas Hellstr=C3=B6m" Cc: Rodrigo Vivi Cc: Dmitry Torokhov Cc: Matthias Schwarzott Cc: Mauro Carvalho Chehab Cc: Tony Nguyen Cc: Przemek Kitszel Cc: Andrew Lunn Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: Arend van Spriel Cc: Rob Herring Cc: Saravana Kannan Cc: Krzysztof Kozlowski Cc: Sylwester Nawrocki Cc: Peter Griffin Cc: Alim Akhtar Cc: Linus Walleij Cc: Anil Gurumurthy Cc: Sudarsana Kalluru Cc: "Martin K. Petersen" Cc: Trond Myklebust Cc: Anna Schumaker Cc: Mike Marshall Cc: Martin Brandenburg Cc: Kees Cook Cc: Jiri Pirko Cc: Simon Horman Cc: Chuck Lever Cc: Jeff Layton Cc: NeilBrown Cc: Olga Kornievskaia Cc: Dai Ngo Cc: Tom Talpey Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Bill Wendling Cc: Andrew Morton Cc: "Mike Rapoport (Microsoft)" Cc: Kanglong Wang Cc: Tiezhu Yang Cc: Qiang Ma Cc: Randy Dunlap Cc: Pengpeng Hou Cc: Ard Biesheuvel Cc: Breno Leitao Cc: Thorsten Blum Cc: Harshit Mogalapalli Cc: Greg Kroah-Hartman Cc: Lyude Paul Cc: Ashutosh Desai Cc: Imre Deak Cc: Dmitry Baryshkov Cc: Johan Hovold Cc: Johannes Berg Cc: Miri Korenblit Cc: Alexander Stein Cc: Cryolitia PukNgae Cc: Jiaming Zhang Cc: Will Porter Cc: Cen Zhang Cc: "C=C3=A1ssio Gabriel" Cc: Rong Zhang Cc: Arun Raghavan Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: loongarch@lists.linux.dev Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-edac@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org Cc: linux-input@vger.kernel.org Cc: linux-media@vger.kernel.org Cc: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: brcm80211@lists.linux.dev Cc: brcm80211-dev-list.pdl@broadcom.com Cc: devicetree@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: linux-scsi@vger.kernel.org Cc: linux-nfs@vger.kernel.org Cc: devel@lists.orangefs.org Cc: linux-hardening@vger.kernel.org Cc: linux-sound@vger.kernel.org --- net/sunrpc/addr.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c index 97ff11973c49..a1e4173e5a53 100644 --- a/net/sunrpc/addr.c +++ b/net/sunrpc/addr.c @@ -264,18 +264,20 @@ EXPORT_SYMBOL_GPL(rpc_pton); */ char *rpc_sockaddr2uaddr(const struct sockaddr *sap, gfp_t gfp_flags) { - char portbuf[RPCBIND_MAXUADDRPLEN]; char addrbuf[RPCBIND_MAXUADDRLEN]; unsigned short port; + size_t len; =20 switch (sap->sa_family) { case AF_INET: - if (rpc_ntop4(sap, addrbuf, sizeof(addrbuf)) =3D=3D 0) + len =3D rpc_ntop4(sap, addrbuf, sizeof(addrbuf)); + if (len =3D=3D 0 || len >=3D sizeof(addrbuf)) return NULL; port =3D ntohs(((struct sockaddr_in *)sap)->sin_port); break; case AF_INET6: - if (rpc_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) =3D=3D 0) + len =3D rpc_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)); + if (len =3D=3D 0 || len >=3D sizeof(addrbuf)) return NULL; port =3D ntohs(((struct sockaddr_in6 *)sap)->sin6_port); break; @@ -283,11 +285,8 @@ char *rpc_sockaddr2uaddr(const struct sockaddr *sap, g= fp_t gfp_flags) return NULL; } =20 - if (snprintf(portbuf, sizeof(portbuf), - ".%u.%u", port >> 8, port & 0xff) >=3D (int)sizeof(portbuf)) - return NULL; - - if (strlcat(addrbuf, portbuf, sizeof(addrbuf)) >=3D sizeof(addrbuf)) + if (snprintf(addrbuf + len, sizeof(addrbuf) - len, + ".%u.%u", port >> 8, port & 0xff) >=3D sizeof(addrbuf) - len) return NULL; =20 return kstrdup(addrbuf, gfp_flags); @@ -352,3 +351,4 @@ size_t rpc_uaddr2sockaddr(struct net *net, const char *= uaddr, return 0; } EXPORT_SYMBOL_GPL(rpc_uaddr2sockaddr); + --=20 2.55.0.1032.g73a4cd73de-goog