// https://syzkaller.appspot.com/bug?id=c905c82285226236abc44f3140e9290e96374cab // 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 #ifndef __NR_bpf #define __NR_bpf 321 #endif 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 (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } *(uint32_t*)0x20001240 = 0; *(uint32_t*)0x20001244 = 0x20; *(uint64_t*)0x20001248 = 0x200004c0; memcpy((void*)0x200004c0, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x60\x00\x00\x00\x00\x00", 23); *(uint32_t*)0x200004d7 = -1; *(uint64_t*)0x20001250 = 0; *(uint32_t*)0x20001258 = 0; *(uint32_t*)0x2000125c = 0; *(uint64_t*)0x20001260 = 0; *(uint32_t*)0x20001268 = 0; *(uint32_t*)0x2000126c = 0; memset((void*)0x20001270, 0, 16); *(uint32_t*)0x20001280 = 0; *(uint32_t*)0x20001284 = 0; *(uint32_t*)0x20001288 = -1; *(uint32_t*)0x2000128c = 8; *(uint64_t*)0x20001290 = 0; *(uint32_t*)0x20001298 = 0; *(uint32_t*)0x2000129c = 0x10; *(uint64_t*)0x200012a0 = 0; *(uint32_t*)0x200012a8 = 0; *(uint32_t*)0x200012ac = 0; *(uint32_t*)0x200012b0 = 0; *(uint32_t*)0x200012b4 = 0; *(uint64_t*)0x200012b8 = 0; *(uint64_t*)0x200012c0 = 0; *(uint32_t*)0x200012c8 = 0x10; *(uint32_t*)0x200012cc = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20001240ul, /*size=*/0x90ul); *(uint32_t*)0x200009c0 = 0; *(uint32_t*)0x200009c4 = 6; *(uint32_t*)0x200009c8 = 0; *(uint32_t*)0x200009cc = 8; *(uint32_t*)0x200009d0 = 0; *(uint32_t*)0x200009d4 = -1; *(uint32_t*)0x200009d8 = 0x20; memset((void*)0x200009dc, 0, 16); *(uint32_t*)0x200009ec = 0; *(uint32_t*)0x200009f0 = -1; *(uint32_t*)0x200009f4 = 0xfffffffc; *(uint32_t*)0x200009f8 = 0; *(uint32_t*)0x200009fc = 0; *(uint64_t*)0x20000a00 = 0; syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200009c0ul, /*size=*/0x48ul); syscall(__NR_getpid); res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul); if (res != -1) r[0] = res; *(uint64_t*)0x20000180 = 0x200005c0; memcpy((void*)0x200005c0, "ext4_es_lookup_extent_exit\000", 27); *(uint32_t*)0x20000188 = r[0]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000180ul, /*size=*/0x10ul); *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000440; memcpy((void*)0x20000440, "\x18\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x11\x00\x00", 20); *(uint32_t*)0x20000454 = -1; memcpy((void*)0x20000458, "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x08\x00\x00\x00\x00\x00\x00\x7b" "\x8a\xf8\xff\x00\x00\x00\x00\xbf\xa2\x00\x00\x00\x00\x00\x00\x07\x02" "\x00\x00\xf8\xff\xff\xff\xb7\x03\x00\x00\x08\x00\x00\x00\xb7\x04\x00" "\x00\x00\x00\x00\x00\x85\x00\x00\x00\x01\x00\x00\x00\x95", 65); *(uint64_t*)0x200000d0 = 0; *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000440; memcpy((void*)0x20000440, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x11\x00\x00", 20); *(uint32_t*)0x20000454 = -1; *(uint64_t*)0x200000d0 = 0; *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); *(uint32_t*)0x200000c0 = 0x11; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000440; *(uint64_t*)0x200000d0 = 0x20000240; memcpy((void*)0x20000240, "GPL\000", 4); *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); if (res != -1) r[1] = res; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0ul, /*size=*/0ul); memcpy((void*)0x20000200, "/dev/net/tun\000", 13); syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000200ul, /*flags=*/0ul, /*mode=*/0ul); syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul, /*flags=O_TRUNC|O_SYNC|O_NOCTTY|O_NOATIME|O_CREAT|O_CLOEXEC|0x1*/ 0x1c1341ul, /*mode=*/0ul); syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul); memcpy((void*)0x20000180, "memory.events\000", 14); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000180ul, /*flags=*/0x26e1ul, /*mode=*/0ul); syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0ul); *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x200003c0; memcpy((void*)0x200003c0, "\x18\x00\x00\x00\x00\x00\x00\x69\x00\x00\x00\x00\x00\x00\x00\x00\x18" "\x11", 18); sprintf((char*)0x200003d2, "%020llu", (long long)r[1]); *(uint64_t*)0x200000d0 = 0; *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); memcpy((void*)0x200002c0, "&b%\000", 4); syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0x40082406, /*filter=*/0x200002c0ul); *(uint32_t*)0x200004c0 = 0x11; *(uint32_t*)0x200004c4 = 0xc; *(uint64_t*)0x200004c8 = 0x20000440; *(uint64_t*)0x200004d0 = 0x20000240; memcpy((void*)0x20000240, "GPL\000", 4); *(uint32_t*)0x200004d8 = 0; *(uint32_t*)0x200004dc = 0; *(uint64_t*)0x200004e0 = 0; *(uint32_t*)0x200004e8 = 0; *(uint32_t*)0x200004ec = 0; memset((void*)0x200004f0, 0, 16); *(uint32_t*)0x20000500 = 0; *(uint32_t*)0x20000504 = 0; *(uint32_t*)0x20000508 = -1; *(uint32_t*)0x2000050c = 0; *(uint64_t*)0x20000510 = 0; *(uint32_t*)0x20000518 = 0; *(uint32_t*)0x2000051c = 0; *(uint64_t*)0x20000520 = 0; *(uint32_t*)0x20000528 = 0; *(uint32_t*)0x2000052c = 0; *(uint32_t*)0x20000530 = 0; *(uint32_t*)0x20000534 = 0; *(uint64_t*)0x20000538 = 0; *(uint64_t*)0x20000540 = 0; *(uint32_t*)0x20000548 = 0; *(uint32_t*)0x2000054c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200004c0ul, /*size=*/0x90ul); if (res != -1) r[2] = res; *(uint64_t*)0x20000740 = 0x20000300; memcpy((void*)0x20000300, "sched_switch\000", 13); *(uint32_t*)0x20000748 = r[2]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000740ul, /*size=*/0x10ul); *(uint32_t*)0x20000100 = 1; *(uint32_t*)0x20000104 = 0x80; *(uint8_t*)0x20000108 = 0; *(uint8_t*)0x20000109 = 0; *(uint8_t*)0x2000010a = 0; *(uint8_t*)0x2000010b = 0; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0x200; *(uint64_t*)0x20000118 = 0x20; *(uint64_t*)0x20000120 = 0; STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 0, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 1, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 2, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 3, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 4, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 5, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 6, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 7, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 8, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 9, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 10, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 11, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 12, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 13, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 14, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 15, 2); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 17, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 18, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 19, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 20, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 21, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 22, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 23, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 24, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 25, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 26, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 27, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 28, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 29, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 30, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 31, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 32, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 33, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 34, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 35, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 36, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 37, 1); STORE_BY_BITMASK(uint64_t, , 0x20000128, 0, 38, 26); *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint64_t*)0x20000148 = 0x4000; *(uint64_t*)0x20000150 = 0; *(uint32_t*)0x20000158 = 0; *(uint32_t*)0x2000015c = 0; *(uint64_t*)0x20000160 = 0; *(uint32_t*)0x20000168 = 0; *(uint16_t*)0x2000016c = 0; *(uint16_t*)0x2000016e = 0; *(uint32_t*)0x20000170 = 0; *(uint32_t*)0x20000174 = 0; *(uint64_t*)0x20000178 = 0; syscall(__NR_perf_event_open, /*attr=*/0x20000100ul, /*pid=*/0, /*cpu=*/-1, /*group=*/-1, /*flags=*/0ul); syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0ul, /*size=*/0ul); memcpy((void*)0x200001c0, "memory.events\000", 14); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200001c0ul, /*flags=*/0x7a05ul, /*mode=*/0x1700ul); memcpy((void*)0x20000380, "freezer.state\000", 14); syscall(__NR_openat, /*fd=*/-1, /*file=*/0x20000380ul, /*flags=*/2ul, /*mode=*/0ul); *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0xc; *(uint64_t*)0x200000c8 = 0x20000440; *(uint64_t*)0x200000d0 = 0; *(uint32_t*)0x200000d8 = 0; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0; *(uint32_t*)0x20000108 = -1; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = 0; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); memcpy((void*)0x20000580, "memory.events\000", 14); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000580ul, /*flags=*/0x100002ul, /*mode=*/0ul); if (res != -1) r[3] = res; memcpy((void*)0x20000180, "threaded\000", 9); syscall(__NR_write, /*fd=*/r[3], /*buf=*/0x20000180ul, /*len=*/0x40001ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }