| // KASAN: slab-out-of-bounds Read in __lock_acquire |
| // https://syzkaller.appspot.com/bug?id=05a9fbfbef5f1ba7b67d218e97d6eb912c368de3 |
| // status:invalid |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <fcntl.h> |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.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[21]; |
| 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*)0x20048000, "\x2f\x64\x65\x76\x2f\x73\x67\x23\x00", |
| 9); |
| r[2] = syz_open_dev(0x20048000ul, 0x0ul, 0x2ul); |
| break; |
| case 2: |
| *(uint64_t*)0x208f4f80 = (uint64_t)0x20d2f000; |
| *(uint64_t*)0x208f4f88 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4f90 = (uint64_t)0x20b43f42; |
| *(uint64_t*)0x208f4f98 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4fa0 = (uint64_t)0x2006ef80; |
| *(uint64_t*)0x208f4fa8 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4fb0 = (uint64_t)0x202aef6b; |
| *(uint64_t*)0x208f4fb8 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4fc0 = (uint64_t)0x20a82f62; |
| *(uint64_t*)0x208f4fc8 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4fd0 = (uint64_t)0x20b70fff; |
| *(uint64_t*)0x208f4fd8 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4fe0 = (uint64_t)0x20f6a000; |
| *(uint64_t*)0x208f4fe8 = (uint64_t)0x0; |
| *(uint64_t*)0x208f4ff0 = (uint64_t)0x20c5a000; |
| *(uint64_t*)0x208f4ff8 = (uint64_t)0x97; |
| r[19] = syscall(__NR_readv, r[2], 0x208f4f80ul, 0x8ul); |
| break; |
| case 3: |
| r[20] = syscall(__NR_fcntl, r[2], 0x4ul, 0x2000ul); |
| 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; |
| } |