// https://syzkaller.appspot.com/bug?id=2cc44b7ec755226bcb8d7c97096200f107a5ab9a // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static long syz_open_dev(volatile long a0, volatile long a1, volatile long 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 { unsigned long nb = a1; char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(nb % 10); nb /= 10; } return open(buf, a2 & ~O_CREAT, 0); } } uint64_t r[1] = {0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // syz_open_dev$evdev arguments: [ // dev: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 69 6e 70 75 74 2f 65 76 65 6e 74 23 00} // (length 0x12) // } // id: intptr = 0x2 (8 bytes) // flags: open_flags = 0x822f01 (8 bytes) // ] // returns fd_evdev memcpy((void*)0x200000000100, "/dev/input/event#\000", 18); res = -1; res = syz_open_dev( /*dev=*/0x200000000100, /*id=*/2, /*flags=O_TRUNC|O_NONBLOCK|O_NOFOLLOW|O_NOCTTY|FASYNC|O_APPEND|0x800001*/ 0x822f01); if (res != -1) r[0] = res; // ioctl$EVIOCSFF arguments: [ // fd: fd_evdev (resource) // cmd: const = 0x40304580 (4 bytes) // arg: ptr[in, ff_effect] { // ff_effect { // type: ff_effect_type = 0x54 (2 bytes) // id: int16 = 0x0 (2 bytes) // dir: int16 = 0x0 (2 bytes) // trigger: ff_trigger { // button: int16 = 0xffff (2 bytes) // interv: int16 = 0x1 (2 bytes) // } // replay: ff_replay { // len: int16 = 0x4d (2 bytes) // delay: int16 = 0xffff (2 bytes) // } // pad = 0x0 (2 bytes) // u: union ff_effect_u { // cond: array[ff_condition_effect] { // ff_condition_effect { // rsatur: int16 = 0x7 (2 bytes) // lsatur: int16 = 0x5388 (2 bytes) // rcoeff: int16 = 0x8 (2 bytes) // lcoeff: int16 = 0x800 (2 bytes) // dead: int16 = 0xcb (2 bytes) // center: int16 = 0xfff (2 bytes) // } // ff_condition_effect { // rsatur: int16 = 0x0 (2 bytes) // lsatur: int16 = 0x5 (2 bytes) // rcoeff: int16 = 0x201 (2 bytes) // lcoeff: int16 = 0x3 (2 bytes) // dead: int16 = 0x6 (2 bytes) // center: int16 = 0x1 (2 bytes) // } // } // } // } // } // ] *(uint16_t*)0x2000000003c0 = 0x54; *(uint16_t*)0x2000000003c2 = 0; *(uint16_t*)0x2000000003c4 = 0; *(uint16_t*)0x2000000003c6 = -1; *(uint16_t*)0x2000000003c8 = 1; *(uint16_t*)0x2000000003ca = 0x4d; *(uint16_t*)0x2000000003cc = -1; *(uint16_t*)0x2000000003d0 = 7; *(uint16_t*)0x2000000003d2 = 0x5388; *(uint16_t*)0x2000000003d4 = 8; *(uint16_t*)0x2000000003d6 = 0x800; *(uint16_t*)0x2000000003d8 = 0xcb; *(uint16_t*)0x2000000003da = 0xfff; *(uint16_t*)0x2000000003dc = 0; *(uint16_t*)0x2000000003de = 5; *(uint16_t*)0x2000000003e0 = 0x201; *(uint16_t*)0x2000000003e2 = 3; *(uint16_t*)0x2000000003e4 = 6; *(uint16_t*)0x2000000003e6 = 1; syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x40304580, /*arg=*/0x2000000003c0ul); // write$char_usb arguments: [ // fd: fd_char_usb (resource) // buf: ptr[in, buffer] { // buffer: {e2} (length 0x1) // } // count: len = 0x2250 (8 bytes) // ] memset((void*)0x200000000040, 226, 1); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000040ul, /*count=*/0x2250ul); return 0; }