From: Kees Cook Date: Wed, 2 Jun 2021 20:29:14 +0000 (-0700) Subject: docs: networking: Replace strncpy() with strscpy() X-Git-Tag: v5.14-rc1~158^2~23 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9ce26c56d37fa6d32f700dfc77f4ceb445ce215;p=thirdparty%2Fkernel%2Flinux.git docs: networking: Replace strncpy() with strscpy() Replace example code's use of strncpy() with strscpy() functions. Using strncpy() is considered deprecated: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings Signed-off-by: Kees Cook Acked-by: Dmitry Torokhov Link: https://lore.kernel.org/r/20210602202914.4079123-1-keescook@chromium.org Signed-off-by: Jonathan Corbet --- diff --git a/Documentation/input/joydev/joystick-api.rst b/Documentation/input/joydev/joystick-api.rst index af5934c10c1c9..5db6dc6fe1c58 100644 --- a/Documentation/input/joydev/joystick-api.rst +++ b/Documentation/input/joydev/joystick-api.rst @@ -263,7 +263,7 @@ possible overrun should the name be too long:: char name[128]; if (ioctl(fd, JSIOCGNAME(sizeof(name)), name) < 0) - strncpy(name, "Unknown", sizeof(name)); + strscpy(name, "Unknown", sizeof(name)); printf("Name: %s\n", name); diff --git a/Documentation/networking/packet_mmap.rst b/Documentation/networking/packet_mmap.rst index 500ef60b1b821..c5da1a5d93de8 100644 --- a/Documentation/networking/packet_mmap.rst +++ b/Documentation/networking/packet_mmap.rst @@ -153,7 +153,7 @@ As capture, each frame contains two parts:: struct ifreq s_ifr; ... - strncpy (s_ifr.ifr_name, "eth0", sizeof(s_ifr.ifr_name)); + strscpy_pad (s_ifr.ifr_name, "eth0", sizeof(s_ifr.ifr_name)); /* get interface index of eth0 */ ioctl(this->socket, SIOCGIFINDEX, &s_ifr); diff --git a/Documentation/networking/tuntap.rst b/Documentation/networking/tuntap.rst index a59d1dd6fdcc2..4d7087f727be5 100644 --- a/Documentation/networking/tuntap.rst +++ b/Documentation/networking/tuntap.rst @@ -107,7 +107,7 @@ Note that the character pointer becomes overwritten with the real device name */ ifr.ifr_flags = IFF_TUN; if( *dev ) - strncpy(ifr.ifr_name, dev, IFNAMSIZ); + strscpy_pad(ifr.ifr_name, dev, IFNAMSIZ); if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){ close(fd);