#define _GNU_SOURCE #include #include #include #include #include #include #include #include #include "die.h" #include "dev.h" #include "ioops.h" #include "str.h" #include "built_in.h" int open_or_die(const char *file, int flags) { int ret = open(file, flags); if (unlikely(ret < 0)) panic("Cannot open file %s! %s.\n", file, strerror(errno)); return ret; } int open_or_die_m(const char *file, int flags, mode_t mode) { int ret = open(file, flags, mode); if (unlikely(ret < 0)) panic("Cannot open or create file %s! %s.", file, strerror(errno)); return ret; } int dup_or_die(int oldfd) { int newfd = dup(oldfd); if (unlikely(newfd < 0)) panic("Cannot dup old file descriptor!\n"); return newfd; } void dup2_or_die(int oldfd, int newfd) { int ret = dup2(oldfd, newfd); if (unlikely(ret < 0)) panic("Cannot dup2 old/new file descriptor!\n"); } void create_or_die(const char *file, mode_t mode) { int fd = open_or_die_m(file, O_WRONLY | O_CREAT, mode); close(fd); } void pipe_or_die(int pipefd[2], int flags) { int ret = pipe2(pipefd, flags); if (unlikely(ret < 0)) panic("Cannot create pipe2 event fd! %s.\n", strerror(errno)); } int tun_open_or_die(const char *name, int type) { int fd, ret; short flags; struct ifreq ifr; if (unlikely(!name)) panic("No name provided for tundev!\n"); fd = open_or_die("/dev/net/tun", O_RDWR); memset(&ifr, 0, sizeof(ifr)); ifr.ifr_flags = type; strlcpy(ifr.ifr_name, name, IFNAMSIZ); ret = ioctl(fd, TUNSETIFF, &ifr); if (unlikely(ret < 0)) panic("ioctl screwed up! %s.\n", strerror(errno)); ret = fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); if (unlikely(ret < 0)) panic("fctnl screwed up! %s.\n", strerror(errno)); flags = device_get_flags(name); flags |= IFF_UP | IFF_RUNNING; device_set_flags(name, flags); return fd; } ssize_t read_or_die(int fd, void *buf, size_t len) { ssize_t ret = read(fd, buf, len); if (unlikely(ret < 0)) { if (errno == EPIPE) die(); panic("Cannot read from descriptor! %s.\n", strerror(errno)); } return ret; } ssize_t write_or_die(int fd, const void *buf, size_t len) { ssize_t ret = write(fd, buf, len); if (unlikely(ret < 0)) { if (errno == EPIPE) die(); panic("Cannot write to descriptor! %s.", strerror(errno)); } return ret; } int read_blob_or_die(const char *file, void *blob, size_t count) { int fd, ret; fd = open_or_die(file, O_RDONLY); ret = read_or_die(fd, blob, count); close(fd); return ret; } int write_blob_or_die(const char *file, const void *blob, size_t count) { int fd, ret; fd = open_or_die_m(file, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR); ret = write_or_die(fd, blob, count); fdatasync(fd); close(fd); return ret; } >
path: root/Documentation/IRQ-affinity.txt
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authorAshutosh Dixit <ashutosh.dixit@intel.com>2016-04-27 14:36:05 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-04-27 15:30:58 -0700
commit82dc4afd7e65455464f0fc2fe6976efde54fe451 (patch)
tree8d84c648ca1e8f0684ac16435dfa9f5c91c30747 /Documentation/IRQ-affinity.txt
parentc3b46c73264b03000d1e18b22f5caf63332547c9 (diff)
misc: mic: Fix for double fetch security bug in VOP driver
The MIC VOP driver does two successive reads from user space to read a variable length data structure. Kernel memory corruption can result if the data structure changes between the two reads. This patch disallows the chance of this happening. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116651 Reported by: Pengfei Wang <wpengfeinudt@gmail.com> Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/IRQ-affinity.txt')