// https://syzkaller.appspot.com/bug?id=15b57794007363562a10bc7ab409d51201ef827e // 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; } #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 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; } } } void execute_one(void) { *(uint32_t*)0x20000340 = 2; *(uint32_t*)0x20000344 = 0x80; *(uint8_t*)0x20000348 = 0xc8; *(uint8_t*)0x20000349 = 0; *(uint8_t*)0x2000034a = 0; *(uint8_t*)0x2000034b = 0; *(uint32_t*)0x2000034c = 0; *(uint64_t*)0x20000350 = 1; *(uint64_t*)0x20000358 = 0x12028; *(uint64_t*)0x20000360 = 0; STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 0, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 1, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 2, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 3, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 4, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 5, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 6, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 7, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 8, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 9, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 10, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 11, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 12, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 13, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 14, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 15, 2); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 17, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 18, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 19, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 20, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 21, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 22, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 23, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 24, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 25, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 26, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 27, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 28, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 29, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 30, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 31, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 32, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 33, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 34, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 35, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 36, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 37, 1); STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 38, 26); *(uint32_t*)0x20000370 = 0; *(uint32_t*)0x20000374 = 0; *(uint64_t*)0x20000378 = 0; *(uint64_t*)0x20000380 = 0; *(uint64_t*)0x20000388 = 0; *(uint64_t*)0x20000390 = 0; *(uint32_t*)0x20000398 = 0; *(uint32_t*)0x2000039c = 0; *(uint64_t*)0x200003a0 = 0x20; *(uint32_t*)0x200003a8 = 0; *(uint16_t*)0x200003ac = 0; *(uint16_t*)0x200003ae = 0; *(uint32_t*)0x200003b0 = 0; *(uint32_t*)0x200003b4 = 0; *(uint64_t*)0x200003b8 = 0; syscall(__NR_perf_event_open, 0x20000340ul, 0, 0ul, -1, 0ul); syscall(__NR_openat, 0xffffff9c, 0ul, 0ul, 0ul); } 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; }