// https://syzkaller.appspot.com/bug?id=768739bacd1c4b88a7c3b6a694228868e2fe580b // 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 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 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) { } } #define SYZ_HAVE_SETUP_TEST 1 static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); } #define SYZ_HAVE_RESET_TEST 1 static void reset_test() { int fd; for (fd = 3; fd < 30; fd++) close(fd); } 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(); reset_test(); 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; } } } #ifndef __NR_ioctl #define __NR_ioctl 54 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 370 #endif #ifndef __NR_socket #define __NR_socket 359 #endif #ifndef __NR_unshare #define __NR_unshare 310 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 uint64_t r[2] = {0xffffffffffffffff, 0x0}; void execute_one(void) { long res = 0; syscall(__NR_unshare, 0x40000000); res = syscall(__NR_socket, 0x10, 3, 0); if (res != -1) r[0] = res; memcpy((void*)0x200001c0, "\x6c\x6f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16); *(uint32_t*)0x200001d0 = 0; res = syscall(__NR_ioctl, (long)r[0], 0x8933, 0x200001c0); if (res != -1) r[1] = *(uint32_t*)0x200001d0; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0x200056c0; *(uint32_t*)0x200056c0 = 0x20000100; *(uint32_t*)0x20000100 = 0x40; *(uint16_t*)0x20000104 = 0x14; *(uint16_t*)0x20000106 = 0x1b49; *(uint32_t*)0x20000108 = 0; *(uint32_t*)0x2000010c = 0; *(uint8_t*)0x20000110 = 0xa; *(uint8_t*)0x20000111 = 0; *(uint8_t*)0x20000112 = 0; *(uint8_t*)0x20000113 = 0; *(uint32_t*)0x20000114 = r[1]; *(uint16_t*)0x20000118 = 0x14; *(uint16_t*)0x2000011a = 1; *(uint8_t*)0x2000011c = 0; *(uint8_t*)0x2000011d = 0; *(uint8_t*)0x2000011e = 0; *(uint8_t*)0x2000011f = 0; *(uint8_t*)0x20000120 = 0; *(uint8_t*)0x20000121 = 0; *(uint8_t*)0x20000122 = 0; *(uint8_t*)0x20000123 = 0; *(uint8_t*)0x20000124 = 0; *(uint8_t*)0x20000125 = 0; *(uint8_t*)0x20000126 = -1; *(uint8_t*)0x20000127 = -1; *(uint32_t*)0x20000128 = htobe32(0); *(uint16_t*)0x2000012c = 0x14; *(uint16_t*)0x2000012e = 2; *(uint64_t*)0x20000130 = htobe64(0); *(uint64_t*)0x20000138 = htobe64(1); *(uint32_t*)0x200056c4 = 0x40; *(uint32_t*)0x2000000c = 1; *(uint32_t*)0x20000010 = 0; *(uint32_t*)0x20000014 = 0; *(uint32_t*)0x20000018 = 0; syscall(__NR_sendmsg, (long)r[0], 0x20000000, 0); } int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }