// https://syzkaller.appspot.com/bug?id=8b456d9f4b011cb98abfcc9264b55420ad6f9ab0 // autogenerated by syzkaller (http://github.com/google/syzkaller) #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include 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); } } long r[18]; void* thr(void* arg) { switch ((long)arg) { case 0: r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); break; case 1: memcpy((void*)0x20ee1000, "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00", 11); r[2] = syz_open_dev(0x20ee1000ul, 0x0ul, 0x2ul); break; case 2: memcpy((void*)0x20000000, "\xff\xf8", 2); r[4] = syscall(__NR_memfd_create, 0x20000000ul, 0x2ul); break; case 3: *(uint64_t*)0x20b9c000 = (uint64_t)0x2064d000; *(uint64_t*)0x20b9c008 = (uint64_t)0x0; *(uint64_t*)0x20b9c010 = (uint64_t)0x2069a000; *(uint64_t*)0x20b9c018 = (uint64_t)0xb0; memcpy((void*)0x2069a000, "\x69\x7d\x06\x0c\xf9\xd8\xbc\x6d\xf3\x51\x00\x11\x43\x8b" "\xa2\x4e\xa2\xb2\x26\x10\xaa\xb4\xd2\xb6\xdc\xe4\xf2\xaa" "\x43\xff\xa8\xa9\xfa\x8a\x9e\x94\x2b\x2d\x65\x90\xea\xf4" "\x9c\xf0\xe3\xfd\x23\x85\x81\x42\xe0\x29\x53\xdf\xc6\x5f" "\xde\x3b\xb8\x56\x5c\xcf\x35\xc5\x5f\xc2\x48\xd0\xad\x6c" "\x47\x3f\x76\x63\x55\xd2\x2a\x9d\x2f\x43\xf4\x49\x3c\xd5" "\x07\xf9\x19\xab\x87\x3a\xa3\xc9\xfb\x28\x8f\x4a\xe3\xa1" "\x34\xda\x84\x40\xae\xee\x57\xd6\x4a\x2a\x47\x14\x2d\x56" "\x92\x64\xdd\x9e\xc1\xfa\x49\x25\x33\xe8\x14\x53\xf1\xad" "\x1d\xae\x61\xd9\xbe\x13\xe0\x70\xac\x9d\x36\xf4\x33\xc0" "\xf1\x2a\xe8\xd5\x6a\xf7\xfb\x38\x01\xa8\x29\xa6\x26\xa8" "\x7b\x14\x23\x5f\x44\xc2\x86\x51\xbf\x99\xa7\x80\x82\x94" "\x96\x57\xf7\x4b\x04\x8a\xe1\xca", 176); r[10] = syscall(__NR_pwritev, r[4], 0x20b9c000ul, 0x2ul, 0x80fcul); break; case 4: r[11] = syscall(__NR_ioctl, r[2], 0x4c00ul, r[4]); break; case 5: *(uint32_t*)0x20b50ff8 = (uint32_t)0x0; *(uint32_t*)0x20b50ffc = (uint32_t)0xfffffffffffffffd; r[14] = syscall(__NR_ioctl, 0xfffffffffffffffful, 0x40086424ul, 0x20b50ff8ul); break; case 6: memcpy((void*)0x20000000, "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00", 11); r[16] = syz_open_dev(0x20000000ul, 0x0ul, 0x2ul); break; case 7: r[17] = syscall(__NR_fallocate, r[16], 0x11ul, 0x800ul, 0x44400004ul); break; } return 0; } void loop() { long i; pthread_t th[16]; memset(r, -1, sizeof(r)); srand(getpid()); for (i = 0; i < 8; i++) { pthread_create(&th[i], 0, thr, (void*)i); usleep(rand() % 10000); } for (i = 0; i < 8; i++) { pthread_create(&th[8 + i], 0, thr, (void*)i); if (rand() % 2) usleep(rand() % 10000); } usleep(rand() % 100000); } int main() { loop(); return 0; }