// https://syzkaller.appspot.com/bug?id=fe4435f4e03ce2f9ca6f8286719e129a71100d5d // 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); int i; for (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; for (iter = 0;; 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 < 5 * 1000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; memcpy((void*)0x200001c0, "/dev/infiniband/rdma_cm\000", 24); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200001c0, 2, 0); if (res != -1) r[0] = res; *(uint32_t*)0x20000080 = 0; *(uint16_t*)0x20000084 = 0x18; *(uint16_t*)0x20000086 = 0xfa00; *(uint64_t*)0x20000088 = 0; *(uint64_t*)0x20000090 = 0x20000180; *(uint16_t*)0x20000098 = 0x106; *(uint8_t*)0x2000009a = 0; *(uint8_t*)0x2000009b = 0; *(uint8_t*)0x2000009c = 0; *(uint8_t*)0x2000009d = 0; *(uint8_t*)0x2000009e = 0; *(uint8_t*)0x2000009f = 0; res = syscall(__NR_write, r[0], 0x20000080, 0x20); if (res != -1) r[1] = *(uint32_t*)0x20000180; *(uint32_t*)0x200000c0 = 0x14; *(uint16_t*)0x200000c4 = 0x88; *(uint16_t*)0x200000c6 = 0xfa00; *(uint32_t*)0x200000c8 = r[1]; *(uint16_t*)0x200000cc = 0x30; *(uint16_t*)0x200000ce = 0; *(uint16_t*)0x200000d0 = 0x1b; *(uint16_t*)0x200000d2 = htobe16(0); *(uint32_t*)0x200000d4 = htobe32(0); memcpy((void*)0x200000d8, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01", 16); *(uint64_t*)0x200000e8 = htobe64(0); *(uint64_t*)0x200000f0 = htobe64(-1); *(uint64_t*)0x200000f8 = 0; syscall(__NR_write, r[0], 0x200000c0, 0x90); } int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }