| // KASAN: use-after-free Write in tls_push_record |
| // https://syzkaller.appspot.com/bug?id=a6e7dc43d03d34acd6ea76b3a1d0139a6100d66a |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void exitf(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit(kRetryStatus); |
| } |
| |
| static bool write_file(const char* file, const char* what, ...) |
| { |
| char buf[1024]; |
| va_list args; |
| va_start(args, what); |
| vsnprintf(buf, sizeof(buf), what, args); |
| va_end(args); |
| buf[sizeof(buf) - 1] = 0; |
| int len = strlen(buf); |
| |
| int fd = open(file, O_WRONLY | O_CLOEXEC); |
| if (fd == -1) |
| return false; |
| if (write(fd, buf, len) != len) { |
| int err = errno; |
| close(fd); |
| errno = err; |
| return false; |
| } |
| close(fd); |
| return true; |
| } |
| |
| static int inject_fault(int nth) |
| { |
| int fd; |
| char buf[16]; |
| |
| fd = open("/proc/thread-self/fail-nth", O_RDWR); |
| if (fd == -1) |
| exitf("failed to open /proc/thread-self/fail-nth"); |
| sprintf(buf, "%d", nth + 1); |
| if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf)) |
| exitf("failed to write /proc/thread-self/fail-nth"); |
| return fd; |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| void loop() |
| { |
| long res = 0; |
| res = syscall(__NR_socket, 0xa, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| *(uint32_t*)0x200000c0 = 1; |
| syscall(__NR_setsockopt, r[0], 6, 0x13, 0x200000c0, 0x151); |
| *(uint16_t*)0x20000140 = 0xa; |
| *(uint16_t*)0x20000142 = htobe16(0); |
| *(uint32_t*)0x20000144 = 0; |
| *(uint8_t*)0x20000148 = 0; |
| *(uint8_t*)0x20000149 = 0; |
| *(uint8_t*)0x2000014a = 0; |
| *(uint8_t*)0x2000014b = 0; |
| *(uint8_t*)0x2000014c = 0; |
| *(uint8_t*)0x2000014d = 0; |
| *(uint8_t*)0x2000014e = 0; |
| *(uint8_t*)0x2000014f = 0; |
| *(uint8_t*)0x20000150 = 0; |
| *(uint8_t*)0x20000151 = 0; |
| *(uint8_t*)0x20000152 = 0; |
| *(uint8_t*)0x20000153 = 0; |
| *(uint8_t*)0x20000154 = 0; |
| *(uint8_t*)0x20000155 = 0; |
| *(uint8_t*)0x20000156 = 0; |
| *(uint8_t*)0x20000157 = 0; |
| *(uint32_t*)0x20000158 = 0; |
| syscall(__NR_connect, r[0], 0x20000140, 0x1c); |
| memcpy((void*)0x20000080, "tls", 4); |
| syscall(__NR_setsockopt, r[0], 6, 0x1f, 0x20000080, 0x152); |
| syscall(__NR_mmap, 0x20003000, 0xffc000, 2, 0x32, -1, 0); |
| *(uint16_t*)0x20000100 = 0x303; |
| *(uint16_t*)0x20000102 = 0x33; |
| syscall(__NR_setsockopt, r[0], 0x11a, 1, 0x20000100, 0x28); |
| *(uint16_t*)0x20000000 = 0xa; |
| *(uint16_t*)0x20000002 = htobe16(0); |
| *(uint32_t*)0x20000004 = 0; |
| *(uint8_t*)0x20000008 = 0xfe; |
| *(uint8_t*)0x20000009 = 0x80; |
| *(uint8_t*)0x2000000a = 0; |
| *(uint8_t*)0x2000000b = 0; |
| *(uint8_t*)0x2000000c = 0; |
| *(uint8_t*)0x2000000d = 0; |
| *(uint8_t*)0x2000000e = 0; |
| *(uint8_t*)0x2000000f = 0; |
| *(uint8_t*)0x20000010 = 0; |
| *(uint8_t*)0x20000011 = 0; |
| *(uint8_t*)0x20000012 = 0; |
| *(uint8_t*)0x20000013 = 0; |
| *(uint8_t*)0x20000014 = 0; |
| *(uint8_t*)0x20000015 = 0; |
| *(uint8_t*)0x20000016 = 0; |
| *(uint8_t*)0x20000017 = 0xbb; |
| *(uint32_t*)0x20000018 = 0; |
| write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N"); |
| write_file("/sys/kernel/debug/fail_futex/ignore-private", "N"); |
| inject_fault(2); |
| syscall(__NR_sendto, r[0], 0x200005c0, 0xfffffdef, 0x40, 0x20000000, 0x1c); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |