| // INFO: rcu detected stall in snd_pcm_oss_read |
| // https://syzkaller.appspot.com/bug?id=be292393a21b15b703e80f44d8d086de711bd813 |
| // status:fixed |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #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)))) |
| |
| static long syz_open_dev(long a0, long a1, 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 { |
| char buf[1024]; |
| char* hash; |
| strncpy(buf, (char*)a0, sizeof(buf) - 1); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| #ifndef __NR_sched_setattr |
| #define __NR_sched_setattr 314 |
| #endif |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| long res = 0; |
| memcpy((void*)0x20000040, "/dev/dsp#\x00", 10); |
| res = syz_open_dev(0x20000040, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| *(uint32_t*)0x2001d000 = 1; |
| *(uint32_t*)0x2001d004 = 0x70; |
| *(uint8_t*)0x2001d008 = 0; |
| *(uint8_t*)0x2001d009 = 0; |
| *(uint8_t*)0x2001d00a = 0; |
| *(uint8_t*)0x2001d00b = 0; |
| *(uint32_t*)0x2001d00c = 0; |
| *(uint64_t*)0x2001d010 = 0x7f; |
| *(uint64_t*)0x2001d018 = 0; |
| *(uint64_t*)0x2001d020 = 0; |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 0, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 1, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 2, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 3, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 6, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 7, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 8, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 9, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 10, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 11, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 12, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 13, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 14, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 15, 2); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 17, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 18, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 19, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 20, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 21, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 22, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 23, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 24, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 25, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 26, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 29, 35); |
| *(uint32_t*)0x2001d030 = 0; |
| *(uint32_t*)0x2001d034 = 0; |
| *(uint64_t*)0x2001d038 = 0; |
| *(uint64_t*)0x2001d040 = 0; |
| *(uint64_t*)0x2001d048 = 0; |
| *(uint64_t*)0x2001d050 = 0x80000004; |
| *(uint32_t*)0x2001d058 = 0; |
| *(uint32_t*)0x2001d05c = 0; |
| *(uint64_t*)0x2001d060 = 0; |
| *(uint32_t*)0x2001d068 = 0; |
| *(uint16_t*)0x2001d06c = 0; |
| *(uint16_t*)0x2001d06e = 0; |
| syscall(__NR_perf_event_open, 0x2001d000, 0, -1, -1, 0); |
| *(uint32_t*)0x20000080 = 0; |
| *(uint32_t*)0x20000084 = 2; |
| *(uint64_t*)0x20000088 = 0; |
| *(uint32_t*)0x20000090 = 0; |
| *(uint32_t*)0x20000094 = 3; |
| *(uint64_t*)0x20000098 = 0; |
| *(uint64_t*)0x200000a0 = 0; |
| *(uint64_t*)0x200000a8 = 0; |
| syscall(__NR_sched_setattr, 0, 0x20000080, 0); |
| *(uint64_t*)0x200001c0 = 0; |
| syscall(__NR_ioctl, r[0], 0x80000040045010, 0x200001c0); |
| syscall(__NR_read, r[0], 0x20000180, 8); |
| return 0; |
| } |