// https://syzkaller.appspot.com/bug?id=797cd651dd0d9bd921e4fa51b792f5afdc3f390f // 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; } 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; } } } #ifndef __NR_bpf #define __NR_bpf 321 #endif uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x2000e000 = 0xe; *(uint32_t*)0x2000e004 = 4; *(uint64_t*)0x2000e008 = 0x20000400; memcpy( (void*)0x20000400, "\xb4\x05\x00\x00\x00\x00\x00\x00\x61\x10\x58\x00\x00\x00\x00\x00\xc6\x00" "\x00\x00\x00\x00\x00\x00\x95\x00\x00\x02\x00\x00\x00\x00\x3f\x20\x31\x84" "\x23\xfb\xcd\xc4\xca\xf5\xce\xcc\x8c\x41\xd6\x6d\x1e\x8d\x08\xdc\x03\x63" "\x99\x12\xea\xdc\xc2\xd1\xd4\x55\xac\x64\x7a\x72\x65\x55\x9c\xcd\x4d\xff" "\x5d\x2b\xb0\xa0\x06\x46\x92\x47\x42\xcd\x84\x83\x08\xe1\x23\x08\xfc\xcf" "\xfc\x1b\x5a\x47\x7c\x32\x73\x13\x1c\xbc\x64\x2b\x16\xa0\x4d\xf2\xe7\x0b" "\x8b\xa7\x91\x21\x74\x28\x13\x58\xfb\x0b\x3e\xe8\x34\x62\xaa\x91\x1e\xa0" "\x7d\xe7\x0d\x93\xcb\xd6\x6d\xa9\x06\x2a\x2a\x58\xea\x90\xc6\x40\xac\x14" "\x99\x5f\x48\x98\x24\x1b\x85\x9b\x80\x6a\x0d\xd9\x9d\xa8\x3d\x6a\xfc\x40" "\x16\xcb\xd2\x0a\x23\x1e\x2b\x56\x2c\xbb\xdf\xfe\xec\x27\x76\xc4\xcd\x68" "\xa2\x67\x06\x0a\x9f\xa2\xd7\xa4\xdd\x02\x73\x84\x34\xe4\x31\x72\x8b\xa4" "\x60\xed\x7a\xb5\x7d\xea\x45\x60\x81\xf0\xd7\xa3\x5d\xad\x81\x03\x26\x33" "\x61\x6b\x02\x2c\x5d\x19\x91\x5e\x18\xb5\x4d\xa3\xf0\xb2\xc7\x8a\xc2\xb9" "\xee\x67\xcb\x9e\x3b\xf1\xa3\xd4\xa7\x34\x8b\xec\x48\x30\xaa\x02\x6a\xf8" "\x1e\x33\x7d\x1c\xc2\xe0\xf5\x23\x0c\x11\xe6\xfb\x2d\x95\xee\x56\x16\x7c" "\x15\x3f\x75\x11\x96\x41\x35\xee\xf9\x60\x37\xc1\x4c\x15\x13\x2b\xdd\x86" "\x7d\xb8\xdb\xa7\x6e\x62\xe5\x15\x0d\xb6\xb1\x95\x52\xfb\x01\xbc\x80\x92" "\xfc\x46\xb6\x87\xc3\x11\xc3\xc5\x37\x21\x6d\x3a\xff\xd7\x42\x17\x10\x8f" "\x5d\x29\xc3\xa4\xc4\xf7\xe2\x60\x2d\xf7\x31\x30\x19\x74\x7e\xd6\xa9\xa0" "\xf1\x9e\x90\x95\x0e\xe7\xb3\xf8\x43\x83\xdf\xc2\x3e\xee\xb0\xad\xa3\xcc" "\xa4\x7b\xd7\x67\xef\xdf\xa3\x3e\xc2\x20\x9c\x96\x5a\x93\x81\xc9\x83\xd0" "\x8d\x54\xe8\x2b\xfb\x4f\x89\x5e\xa5\xb8\x12\x00", 390); *(uint64_t*)0x2000e010 = 0x20003ff6; memcpy((void*)0x20003ff6, "GPL\000", 4); *(uint32_t*)0x2000e018 = 4; *(uint32_t*)0x2000e01c = 0xfd90; *(uint64_t*)0x2000e020 = 0x2000cf3d; *(uint32_t*)0x2000e028 = 0; *(uint32_t*)0x2000e02c = 0; memset((void*)0x2000e030, 0, 16); *(uint32_t*)0x2000e040 = 0; *(uint32_t*)0x2000e044 = 0; *(uint32_t*)0x2000e048 = -1; *(uint32_t*)0x2000e04c = 8; *(uint64_t*)0x2000e050 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x2000e058 = 0x366; *(uint32_t*)0x2000e05c = 0x10; *(uint64_t*)0x2000e060 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x2000e068 = 0x187; *(uint32_t*)0x2000e06c = 0; *(uint32_t*)0x2000e070 = -1; res = syscall(__NR_bpf, 5ul, 0x2000e000ul, 0x48ul); if (res != -1) r[0] = res; *(uint32_t*)0x20000100 = 0x12; *(uint32_t*)0x20000104 = 4; *(uint32_t*)0x20000108 = 8; *(uint32_t*)0x2000010c = 4; *(uint32_t*)0x20000110 = 0; *(uint32_t*)0x20000114 = -1; *(uint32_t*)0x20000118 = 0; memset((void*)0x2000011c, 0, 16); *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = -1; *(uint32_t*)0x20000134 = 0; *(uint32_t*)0x20000138 = 0; *(uint32_t*)0x2000013c = 0; res = syscall(__NR_bpf, 0x100000000000000ul, 0x20000100ul, 0x40ul); if (res != -1) r[1] = res; *(uint32_t*)0x20000080 = r[1]; *(uint32_t*)0x20000084 = r[0]; *(uint32_t*)0x20000088 = 5; *(uint32_t*)0x2000008c = 0; syscall(__NR_bpf, 8ul, 0x20000080ul, 0x10ul); res = syscall(__NR_socket, 1ul, 5ul, 0); if (res != -1) r[2] = res; *(uint32_t*)0x20000200 = r[1]; *(uint64_t*)0x20000208 = 0x20000140; *(uint64_t*)0x20000210 = 0x200000c0; *(uint32_t*)0x200000c0 = r[2]; *(uint64_t*)0x20000218 = 0; syscall(__NR_bpf, 2ul, 0x20000200ul, 0x20ul); } 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; }