// https://syzkaller.appspot.com/bug?id=10da298663026bef6ec157384c060812c3c32945 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) { continue; } kill_and_wait(pid, &status); break; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x20009480, "/dev/mixer\000", 11); res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20009480ul, 0ul, 0ul); if (res != -1) r[0] = res; syscall(__NR_ioctl, r[0], 0x80254d18, 0ul); memcpy((void*)0x20000000, "/proc/asound/card0/oss_mixer\000", 29); res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000000ul, 0x2002ul, 0ul); if (res != -1) r[1] = res; memcpy((void*)0x20000080, "TREBLE", 6); memcpy((void*)0x20000086, " \'", 2); memcpy((void*)0x20000088, "Mic Capture Switch", 18); memcpy((void*)0x2000009a, "\' ", 2); sprintf((char*)0x2000009c, "%020llu", (long long)0); *(uint8_t*)0x200000b0 = 0xa; memcpy((void*)0x200000b1, "VIDEO", 5); *(uint8_t*)0x200000b6 = 0xa; memcpy((void*)0x200000b7, "VOLUME", 6); *(uint8_t*)0x200000bd = 0xa; memcpy((void*)0x200000be, "MONITOR", 7); memcpy((void*)0x200000c5, " \'", 2); memcpy((void*)0x200000c7, "Master", 6); memcpy((void*)0x200000cd, "\' ", 2); sprintf((char*)0x200000cf, "%020llu", (long long)0); *(uint8_t*)0x200000e3 = 0xa; memcpy((void*)0x200000e4, "LINE", 4); *(uint8_t*)0x200000e8 = 0xa; memcpy((void*)0x200000e9, "ALTPCM", 6); *(uint8_t*)0x200000ef = 0xa; memcpy((void*)0x200000f0, "TREBLE", 6); memcpy((void*)0x200000f6, " \'", 2); memcpy((void*)0x200000f8, "Master Playback Switch", 22); memcpy((void*)0x2000010e, "\' ", 2); sprintf((char*)0x20000110, "%020llu", (long long)0); *(uint8_t*)0x20000124 = 0xa; memcpy((void*)0x20000125, "SYNTH", 5); *(uint8_t*)0x2000012a = 0xa; syscall(__NR_write, r[1], 0x20000080ul, 0xabul); memcpy((void*)0x20000000, "/proc/asound/card0/oss_mixer\000", 29); res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000000ul, 0x2002ul, 0ul); if (res != -1) r[2] = res; memcpy((void*)0x20000080, "VIDEO", 5); *(uint8_t*)0x20000085 = 0xa; memcpy((void*)0x20000086, "RECLEV", 6); memcpy((void*)0x2000008c, " \'", 2); memcpy((void*)0x2000008e, "CD Capture Switch", 17); memcpy((void*)0x2000009f, "\' ", 2); sprintf((char*)0x200000a1, "%020llu", (long long)0); *(uint8_t*)0x200000b5 = 0xa; memcpy((void*)0x200000b6, "PCM", 3); memcpy((void*)0x200000b9, " \'", 2); memcpy((void*)0x200000bb, "Master", 6); memcpy((void*)0x200000c1, "\' ", 2); sprintf((char*)0x200000c3, "%020llu", (long long)0); *(uint8_t*)0x200000d7 = 0xa; memcpy((void*)0x200000d8, "OGAIN", 5); *(uint8_t*)0x200000dd = 0xa; memcpy((void*)0x200000de, "LINE2", 5); memcpy((void*)0x200000e3, " \'", 2); memcpy((void*)0x200000e5, "Synth", 5); memcpy((void*)0x200000ea, "\' ", 2); sprintf((char*)0x200000ec, "%020llu", (long long)0); *(uint8_t*)0x20000100 = 0xa; memcpy((void*)0x20000101, "PCM", 3); memcpy((void*)0x20000104, " \'", 2); memcpy((void*)0x20000106, "Synth Capture", 13); memcpy((void*)0x20000113, "\' ", 2); sprintf((char*)0x20000115, "%020llu", (long long)0); *(uint8_t*)0x20000129 = 0xa; memcpy((void*)0x2000012a, "MONITOR", 7); memcpy((void*)0x20000131, " \'", 2); memcpy((void*)0x20000133, "Line", 4); memcpy((void*)0x20000137, "\' ", 2); sprintf((char*)0x20000139, "%020llu", (long long)0); *(uint8_t*)0x2000014d = 0xa; syscall(__NR_write, r[2], 0x20000080ul, 0xceul); } int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }