// https://syzkaller.appspot.com/bug?id=8d51d7a5e09a32f44542d1f309fcf43b0318b984 // 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 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[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint64_t*)0x200005c0 = 0; *(uint32_t*)0x200005c8 = 0; *(uint64_t*)0x200005d0 = 0x200000c0; *(uint64_t*)0x200000c0 = 0x20000140; *(uint32_t*)0x20000140 = 0x60; *(uint16_t*)0x20000144 = 0; *(uint16_t*)0x20000146 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; *(uint8_t*)0x20000150 = 0x1c; *(uint8_t*)0x20000151 = 0; *(uint16_t*)0x20000152 = 0; *(uint16_t*)0x20000154 = 8; *(uint16_t*)0x20000156 = 1; memcpy((void*)0x20000158, "pci\000", 4); *(uint16_t*)0x2000015c = 0x11; *(uint16_t*)0x2000015e = 2; memcpy((void*)0x20000160, "0000:00:10.0\000", 13); *(uint16_t*)0x20000170 = 8; *(uint16_t*)0x20000172 = 0xb; *(uint32_t*)0x20000174 = 0; *(uint16_t*)0x20000178 = 0xe; *(uint16_t*)0x2000017a = 1; memcpy((void*)0x2000017c, "netdevsim\000", 10); *(uint16_t*)0x20000188 = 0xf; *(uint16_t*)0x2000018a = 2; memcpy((void*)0x2000018c, "netdevsim", 9); *(uint8_t*)0x20000195 = 0x30; *(uint8_t*)0x20000196 = 0; *(uint16_t*)0x20000198 = 8; *(uint16_t*)0x2000019a = 0xb; *(uint32_t*)0x2000019c = 0; *(uint64_t*)0x200000c8 = 0x60; *(uint64_t*)0x200005d8 = 1; *(uint64_t*)0x200005e0 = 0; *(uint64_t*)0x200005e8 = 0; *(uint32_t*)0x200005f0 = 0; syscall(__NR_sendmsg, -1, 0x200005c0ul, 0ul); res = syscall(__NR_socket, 0x10ul, 3ul, 0); if (res != -1) r[0] = res; *(uint64_t*)0x20000040 = 0; *(uint32_t*)0x20000048 = 0; *(uint64_t*)0x20000050 = 0x20000000; *(uint64_t*)0x20000000 = 0x20000140; memcpy((void*)0x20000140, "\x48\x00\x00\x00\x10\x00\x05\x07\x00\x00\x04\x00\x00\x00\x00\x00\x00" "\x00\x00\x00", 20); *(uint32_t*)0x20000154 = -1; memcpy((void*)0x20000158, "\x00\x00\x00\x00\x00\x00\x00\x00\x28\x00\x12\x00\x0c\x00", 14); *(uint64_t*)0x20000008 = 0x48; *(uint64_t*)0x20000058 = 1; *(uint64_t*)0x20000060 = 0; *(uint64_t*)0x20000068 = 0; *(uint32_t*)0x20000070 = 0; syscall(__NR_sendmsg, r[0], 0x20000040ul, 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); loop(); return 0; }