| // general protection fault in __lock_acquire |
| // https://syzkaller.appspot.com/bug?id=70d8fb6542e9c7b50a6e431537f1f62e358b134d |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <fcntl.h> |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| #include <stdint.h> |
| #include <string.h> |
| |
| 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 void test(); |
| |
| void loop() |
| { |
| while (1) { |
| test(); |
| } |
| } |
| |
| long r[1]; |
| void* thr(void* arg) |
| { |
| switch ((long)arg) { |
| case 0: |
| syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, |
| 0xfffffffffffffffful, 0x0ul); |
| break; |
| case 1: |
| memcpy((void*)0x20000000, "/dev/sg#", 9); |
| r[0] = syz_open_dev(0x20000000ul, 0x0ul, 0x0ul); |
| break; |
| case 2: |
| syscall(__NR_read, r[0], 0x206f6000ul, 0xdbul); |
| break; |
| case 3: |
| syscall(__NR_fcntl, r[0], 0x4ul, 0x2800ul); |
| break; |
| } |
| return 0; |
| } |
| |
| void test() |
| { |
| long i; |
| pthread_t th[8]; |
| |
| memset(r, -1, sizeof(r)); |
| for (i = 0; i < 4; i++) { |
| pthread_create(&th[i], 0, thr, (void*)i); |
| usleep(rand() % 10000); |
| } |
| usleep(rand() % 100000); |
| } |
| |
| int main() |
| { |
| int i; |
| for (i = 0; i < 8; i++) { |
| if (fork() == 0) { |
| loop(); |
| return 0; |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |