// https://syzkaller.appspot.com/bug?id=d0d8879a66b36bd60a0d815b7755e558a9afc82f // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); intptr_t res = 0; memcpy((void*)0x20000040, "/dev/snd/seq\000", 13); res = syscall( __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000040ul, /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_EXCL|FASYNC|0x1*/ 0x62181ul, 0); if (res != -1) r[0] = res; *(uint32_t*)0x200001c0 = 0; *(uint32_t*)0x200001c4 = 0; STORE_BY_BITMASK(uint32_t, , 0x200001c8, 0, 0, 1); memcpy((void*)0x200001c9, "queue0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000", 64); *(uint32_t*)0x2000020c = 0; memset((void*)0x20000210, 0, 60); syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc08c5332, /*arg=*/0x200001c0ul); memcpy((void*)0x20000140, "/dev/audio\000", 11); res = syscall( __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000140ul, /*flags=O_TRUNC|O_NOATIME|O_WRONLY|0x40000000000000*/ 0x40000000040201ul, /*mode=*/0ul); if (res != -1) r[1] = res; *(uint32_t*)0x20000500 = 0; *(uint16_t*)0x20000504 = 0xfd83; *(uint16_t*)0x20000506 = 0xfa00; *(uint64_t*)0x20000508 = 0; *(uint64_t*)0x20000510 = 0; *(uint16_t*)0x20000518 = 0; *(uint8_t*)0x2000051a = 0; memset((void*)0x2000051b, 0, 5); syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000500ul, /*len=*/0xfdbcul); return 0; }