| // general protection fault in sg_read |
| // https://syzkaller.appspot.com/bug?id=4462682cd32aee8ff03a43c8b9be3963743bc506 |
| // status:invalid |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.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); |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| void loop() |
| { |
| long res; |
| memcpy((void*)0x200001c0, "/dev/sg#", 9); |
| res = syz_open_dev(0x200001c0, 0, 0x40000000006); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x20000080, "system_u:object_r:tzdata_exec_t:s0", 34); |
| *(uint8_t*)0x200000a2 = 0x20; |
| memcpy((void*)0x200000a3, "system_u:object_r:tun_tap_device_t:s0", 37); |
| *(uint8_t*)0x200000c8 = 0x20; |
| *(uint8_t*)0x200000c9 = 0x38; |
| *(uint8_t*)0x200000ca = 0x33; |
| *(uint8_t*)0x200000cb = 0x20; |
| memcpy((void*)0x200000cc, "/sbin/dhclient", 15); |
| syscall(__NR_write, r[0], 0x20000080, 0x5b); |
| *(uint64_t*)0x2085dff0 = 0x20e94000; |
| *(uint64_t*)0x2085dff8 = 0x10024; |
| syscall(__NR_readv, r[0], 0x2085dff0, 0x146); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |