| // WARNING: kobject bug in netdev_queue_update_kobjects |
| // https://syzkaller.appspot.com/bug?id=86a8e2ab50527d5a5eb4fad2fc15df609f22d86a |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.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 uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2) |
| { |
| if (a0 == 0xc || a0 == 0xb) { |
| char buf[128]; |
| sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, |
| (uint8_t)a2); |
| return open(buf, O_RDWR, 0); |
| } else { |
| char buf[1024]; |
| char* hash; |
| strncpy(buf, (char*)a0, sizeof(buf)); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| 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) { |
| close(fd); |
| 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; |
| } |
| |
| static void test(); |
| |
| void loop() |
| { |
| while (1) { |
| test(); |
| } |
| } |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| void test() |
| { |
| long res; |
| memcpy((void*)0x20000100, "/dev/net/tun", 13); |
| res = syz_open_dev(0x20000100, 0, 0); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x200000c0, |
| "\xd2\x02\xb9\x99\xcf\x85\x00\x00\x00\x00\x00\x88\xf3\x01\xe7\x10", |
| 16); |
| *(uint16_t*)0x200000d0 = 0x102; |
| syscall(__NR_ioctl, r[0], 0x400454ca, 0x200000c0); |
| memcpy((void*)0x20000140, |
| "\x76\x68\x61\x6e\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", |
| 16); |
| *(uint16_t*)0x20000150 = 0x400; |
| syscall(__NR_ioctl, r[0], 0x400454d9, 0x20000140); |
| memcpy((void*)0x20000280, "/dev/net/tun", 13); |
| res = syz_open_dev(0x20000280, 0, 0); |
| if (res != -1) |
| r[1] = res; |
| memcpy((void*)0x200000c0, |
| "\xd2\x02\xb9\x99\xcf\x85\x00\x00\x00\x00\x00\x88\xf3\x01\xe7\x10", |
| 16); |
| *(uint16_t*)0x200000d0 = 0x102; |
| syscall(__NR_ioctl, r[1], 0x400454ca, 0x200000c0); |
| memcpy((void*)0x20000200, |
| "\x05\x00\x00\x00\x00\xe7\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", |
| 16); |
| *(uint16_t*)0x20000210 = 0x200; |
| write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N"); |
| write_file("/sys/kernel/debug/fail_futex/ignore-private", "N"); |
| inject_fault(1); |
| syscall(__NR_ioctl, r[0], 0x400454d9, 0x20000200); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| loop(); |
| } |
| } |