// https://syzkaller.appspot.com/bug?id=f85dc79e750b4daaf80932bed5cd6c6d873c4354 // 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; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x200001c0, "NETMAP\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000", 29); *(uint8_t*)0x200001dd = 0; *(uint32_t*)0x20000280 = 0x1e; syscall(__NR_getsockopt, -1, 0, 0x63, 0x200001c0ul, 0x20000280ul); memcpy((void*)0x20000080, "/dev/snd/seq\000", 13); res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000080ul, 2ul, 0); if (res != -1) r[0] = res; *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; STORE_BY_BITMASK(uint32_t, , 0x20000108, 0, 0, 1); memcpy((void*)0x20000109, "queue1\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*)0x2000014c = 0; memset((void*)0x20000150, 0, 60); syscall(__NR_ioctl, r[0], 0xc08c5332, 0x20000100ul); *(uint8_t*)0x200003c0 = 0xfe; *(uint8_t*)0x200003c1 = 0x80; memset((void*)0x200003c2, 0, 13); *(uint8_t*)0x200003cf = 0xaa; *(uint32_t*)0x200003d0 = htobe32(0xe0000001); *(uint16_t*)0x200003e0 = htobe16(0); *(uint16_t*)0x200003e2 = htobe16(0); *(uint16_t*)0x200003e4 = htobe16(0); *(uint16_t*)0x200003e6 = htobe16(0); *(uint16_t*)0x200003e8 = 0; *(uint8_t*)0x200003ea = 0; *(uint8_t*)0x200003eb = 0; *(uint8_t*)0x200003ec = 0; *(uint32_t*)0x200003f0 = 0; *(uint32_t*)0x200003f4 = 0; *(uint64_t*)0x200003f8 = 0; *(uint64_t*)0x20000400 = 0; *(uint64_t*)0x20000408 = 0; *(uint64_t*)0x20000410 = 0; *(uint64_t*)0x20000418 = 0; *(uint64_t*)0x20000420 = 0; *(uint64_t*)0x20000428 = 0; *(uint64_t*)0x20000430 = 0; *(uint64_t*)0x20000438 = 0; *(uint64_t*)0x20000440 = 0; *(uint64_t*)0x20000448 = 0; *(uint64_t*)0x20000450 = 0; *(uint32_t*)0x20000458 = 0; *(uint32_t*)0x2000045c = 0; *(uint8_t*)0x20000460 = 0; *(uint8_t*)0x20000461 = 0; *(uint8_t*)0x20000462 = 0; *(uint8_t*)0x20000463 = 0; *(uint32_t*)0x20000468 = htobe32(0); *(uint32_t*)0x20000478 = htobe32(0); *(uint8_t*)0x2000047c = 0; *(uint16_t*)0x20000480 = 0; memcpy((void*)0x20000484, " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16); *(uint32_t*)0x20000494 = 0; *(uint8_t*)0x20000498 = 0; *(uint8_t*)0x20000499 = 0; *(uint8_t*)0x2000049a = 0; *(uint32_t*)0x2000049c = 0; *(uint32_t*)0x200004a0 = 0; *(uint32_t*)0x200004a4 = 0; syscall(__NR_setsockopt, -1, 0, 0x11, 0x200003c0ul, 0xe8ul); *(uint32_t*)0x20000200 = 0; *(uint32_t*)0x20000204 = 0; *(uint32_t*)0x20000208 = 2; *(uint32_t*)0x2000020c = 0; *(uint32_t*)0x20000210 = 0; *(uint32_t*)0x20000214 = 0; *(uint32_t*)0x20000218 = 0; *(uint32_t*)0x2000021c = 0x3ff; memset((void*)0x20000220, 0, 64); syscall(__NR_ioctl, r[0], 0x40605346, 0x20000200ul); *(uint8_t*)0x200000c0 = 0; *(uint8_t*)0x200000c1 = 0; *(uint8_t*)0x200000c2 = 0; *(uint8_t*)0x200000c3 = 0; *(uint32_t*)0x200000c4 = 0; *(uint32_t*)0x200000c8 = 0; *(uint8_t*)0x200000cc = 0; *(uint8_t*)0x200000cd = 0; *(uint8_t*)0x200000ce = 0; *(uint8_t*)0x200000cf = 0; memcpy((void*)0x200000d0, "\xa3\x57\xb6\xb1\x40\xcb\xb6\x21\x5d\xd3\x34\x59", 12); syscall(__NR_write, r[0], 0x200000c0ul, 0xfffffee4ul); } 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; }