// https://syzkaller.appspot.com/bug?id=1ff6c1abe140383148dea077ca2cbef65140d84e // 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 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; } } } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x20000340 = 2; *(uint32_t*)0x20000344 = 4; *(uint32_t*)0x20000348 = 8; *(uint32_t*)0x2000034c = 1; *(uint32_t*)0x20000350 = 0x80; *(uint32_t*)0x20000354 = -1; *(uint32_t*)0x20000358 = 0; memset((void*)0x2000035c, 0, 16); *(uint32_t*)0x2000036c = 0; *(uint32_t*)0x20000370 = -1; *(uint32_t*)0x20000374 = 0; *(uint32_t*)0x20000378 = 0; *(uint32_t*)0x2000037c = 0; *(uint64_t*)0x20000380 = 0; res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x20000340ul, /*size=*/0x48ul); if (res != -1) r[0] = res; *(uint32_t*)0x20000480 = r[0]; syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x20000480ul, /*size=*/4ul); *(uint32_t*)0x20000980 = 0x11; *(uint32_t*)0x20000984 = 8; *(uint64_t*)0x20000988 = 0x20003e80; memcpy( (void*)0x20003e80, "\x62\x0a\xf8\xff\x0c\x20\x00\x21\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01" "\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x03\x00\x00\x00\xbd\x12\x00\x00" "\x00\x00\x00\x00\x85\x00\x00\x00\x06\x00\x00\x00\xb7\x00\x00\x00\x00\x00" "\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x3f\xaf\x4f\x1e\x7f\x2a\xa3\xd9" "\xb1\x8e\xd8\x1c\x0c\x86\x9b\x51\xec\x6c\x0a\xf4\xe0\xe4\xa9\x44\x6c\x76" "\x70\x56\x89\x82\xb4\xe0\x20\xf6\x98\x39\x3a\xa0\xf3\x88\x1f\x9c\x24\xaa" "\x56\xf1\x51\x99\xfa\xd0\x09\x3c\x59\xd6\x6b\x5e\xce\x9f\x36\xc7\x0d\x0f" "\x13\x90\x5e\xa2\x3c\x22\x62\x4c\x9f\x87\xf9\x79\x3f\x50\xbb\x54\x60\x40" "\x67\x7b\x0c\x50\x77\xda\x80\xfb\x98\x2c\x1e\x94\x00\xe6\x93\x14\x6c\xea" "\x48\x4a\x41\x5b\x76\x96\x61\x18\xb6\x4f\x75\x1a\x0f\x24\x1b\x07\x2e\x90" "\x08\x00\x08\x00\x2d\x75\x59\x3a\x28\x6c\xec\xc9\x3e\x64\xc2\x27\xc9\x5a" "\xa0\xb7\x84\x62\x57\x04\xf0\x7a\x72\xc2\x34\x66\x4c\x0a\xf9\x36\x0a\x1f" "\x7a\x5e\x6b\x60\x71\x30\xc8\x9f\x18\xc0\xc1\x08\x9d\x8b\x85\x01\x04\x00" "\x00\xa2\x7a\xe8\xb0\x9e\x00\xe7\x9a\xb2\x0b\x0b\x8e\x11\x48\xf4\x9f\xaf" "\x2a\xd0\x00\x00\x00\x00\x00\x00\x00\x6f\xa0\x3c\x64\x68\x97\x20\x89\xb3" "\x02\xd7\xbf\x60\x23\xcd\xce\xdb\x5e\x01\x25\xeb\xbc\x08\xde\xe5\x10\xcb" "\x23\x64\x14\x92\x15\x10\x83\x33\x71\x9a\xcd\x97\xcf\xa1\x07\xd4\x02\x24" "\xed\xc5\x46\x5a\x93\x2b\x77\xe7\x4e\x80\x2a\x0d\x42\xbc\x60\x99\xad\x23" "\x00\x00\x00\x80\x00\x6e\xf6\xc1\xff\x09\x00\x00\x00\x00\x00\x00\x10\xc6" "\x3a\x94\x9e\x8b\x79\x55\x39\x4f\xfa\x82\xb8\xe9\x42\xc8\x91\x12\xf4\xab" "\x87\xb1\xbf\xed\xa7\xbe\x58\x66\x02\xd9\x85\x43\x0c\xea\x01\x62\xab\x3f" "\xcf\x45\x91\xc9\x26\xab\xfb\x07\x67\x19\x23\x02\x00\x00\x00\xb0\xee\xa2" "\x44\x92\xa6\x60\x58\x3e\xec\xb4\x2c\xbc\xd3\xde\x3a\x83\x20\x9d\xa1\x7a" "\x0f\xaf\x60\xfd\x6a\xd9\xb9\x7a\xa5\xfa\x68\x48\x03\x66\xc9\xc6\xfd\x6f" 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"\xdc\xc9\xff\xff\xff\xff\xff\xff\xff\xd3\x9f\xec\x22\x71\xff\x01\x58\x96" "\x46\xef\xd1\xcf\x87\x0c\xd7\xbb\x23\x66\xfd\xe4\x1f\x94\x29\x0c\x2a\x5f" "\xf8\x70\xce\x41\xfd\x34\x67\xde\xcb\x05\xcf\xd9\xfc\xb3\x2c\x8e\xd1\xdb" "\xd9\xd1\x0a\x64\xc1\x08\x3d\x5e\x71\xb5\x56\x5b\x17\x68\xee\x58\x96\x9c" "\x41\x59\x52\x29\xdf\x17\xbc\xad\x70\xfb\x40\x21\x42\x8c\xe9\x70\x27\x5d" "\x13\xb7\x81\x00\x78\x8f\x11\xf7\x61\x61\xd4\x6e\xa3\xab\xe0\xfa\x4d\x30" "\xdc\x94\xef\x24\x18\x75\xf3\xb4\xce\x02\x32\xfc\xea\x69\xc2\x71\xd7\xfa" "\x29\x82\x2a\xea\x68\xa6\x60\xe7\x17\xa0\x4b\xec\xff\x0f\x71\x91\x97\x72" "\x4f\x4f\xce\x10\x93\xb6\x2d\x7e\x8c\x71\x23\xd8\xec\x57\x1b\xe5\x4c\x72" "\xd9\x78\xcf\x90\x6d\xf0\x04\x2e\x36\xac\xd3\x7d\x7f\x9e\x11\x9f\x2c\x06" "\xf8\x15\x31\x2e\x0c\xfe\x22\x2a\x06\xf5\x6d\xd0\x22\xc0\x74\xeb\x8a\x32" "\x2f\xb0\xbf\x47\xc0\xa8\xd1\x54\xb4\x05\xc3\x7f\xea\xf3\xdd\x95\xf6\xef" "\x2a\xe5\x82\x78\x61\x05\xc7\xdf\x8b\xe5\x87\x70\x50\xc9\x13\x01\xbb\x99" 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"\xb4\xa4\xa2\x68\x92\x17\x38\x04\x00\xa9\xf3\xcb\x38\x11\xac\x87\xc5\x4c" "\x8e\xbc\x8b\xcf\xb4\x61\x3c\xc3\xa9\x97\xff\x15\x79\xed\xbd\x4a\xde\x80" "\x20\xe3\xad\x00\x1b\x07\x2b\x1a\x75\x1b\x58\x8a\xc4\x63\x9f\x35\xa5\x8e" "\x00\xa5\x0c\x02\x70\x60\x8c\x7a\x7f\x10\x13\x2b\x1c\x25\xb9\xea\x81\x23" "\x2f\xbe\xf6\x65\xf6\x21\x2f\x87\x5b\x2a\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x20\xbd\x79\xe4\x1c\x68\x21\x39\xc5\x8a\xc1\xde" "\xb0\x39\xa6\x91\xad\x64\x0e\x12\xc1\x2f\xe1\x1d\x70\xfe\x49\x59\x06\xf2" "\xd5\xd7\x17\x78\xac\xbd\x4e\xee\x53\xa3\x99\x6c\xb0\xde\x84\xbd\x2b\x05" "\x9d\x60\xc0\xf9\x6a\x53\xea\x44\xe0\xb2\x93\x86\x5a\xa6\x8d\xf4\x94\xf8" "\x7d\xb9\x76\xe3\x6a\xd6\xc0\x69\x12\x24\x4d\x4c\x88\x3c\x4a\xaa\x60\x2e" "\xa1\x39\x2c\xe0\xb2\xf2\xc5\x19\x66\x3b\x46\x52\xff\x87\x1e\x0f\x6d\xff" "\xf9\xf7\xd3\x4e\xcf\x04\xbe\x0a\x58\xc3\xd5\x31\x74\xb6\x7d\x18\x86\xe3" "\x4b\x81\xad\x8c\x60\xda\x56\xac\xc6\x47\x39\xc3\xac\xab\x24\xaa\x8d\x0a" "\xc9\x2d\x46\x50\x74\xf9\x15\x60\x8b\x1b\x60\xa9\x48\xba\xd4\x01\xb1\xa7" "\xfb\x36\x27\xbb\xe6\xc4\x51\x23\xed\x44\xbf\xdf\x8c\xc1\x43\xbd\x1b\x7a" "\x66\x3d\xc3\xd0\x47\x6b\x8e\x39\xbe\xcf\xfc\x42\x9e\x41\xf6\x6b\x1e\x37" "\xae\x52\xaa\xca\xff\x0f\x1d\xc8\xea\x70\xb6\x8c\x25\x07\x2e\x20\x58\x6b" "\x19\x12\x7d\x75\xfa\x71\x57\x7f\x26\x5c\x51\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x46\xc5\x26\xaf\x5d\x20\xbb\x22\x45\x31\x48\xef" "\x4f\xbf\x93\xf9\xa4\xd3\xf4\x9c\x37\x19\xbd\xce\x14\xfb\x65\x00\xba\x19" "\xb7\x7e\xf3\x1d\x56\xac\xd8\xf5\xd0\x1f\xf1\x83\x32\x89\x28\x56\x25\x1e" "\xc9\x0c\x35\xa1\x6e\xd2\xd4\xd4\x2d\xf4\x3a\x6b\x0d\xf7\xcf\x7a\x84\x84" "\x6a\x4e\x0e\x5e\x34\xaa\x79\x7d\x6b\x6e\x21\xba\x2d\x31\x2e\x9a\x46\xcd" "\x8f\x83\xd0\xfb\xc7\x7c\xf1\x58\x75\xbc\x8a\xfe\x84\xe1\x94\x25\x79\x3e" "\xf0\x87\x84\x81\x7f\x30\xf7\x74\xec\x7c\xcd\xc6\x0c\xf8\xa8\xae\xb9\xca" "\x26\x39\xd7\x6d\x0e\x53\x79\x5d\x2e\x44\x2a\xfa\x40\xad\xb8\x7d\x47\xa4" "\xff\x4d\xcf\x55\xfc\xb6\x50\x43\xb4\x52\x17\x7e\xc3\x0c\x10\x82\xf9\x41" "\x7a\x9b\xa5\x0f\xec\x37\xf0\xdb\x3b\x6b\xde\xc4\x46\x43\x8d\x95\xe5\x98" "\x83\xee\xb7\x4a\x80\xec\xaa\xdf\xa7\xb5\xb9\x79\xfd\x65\x6d\x41\x6a\xdd" "\x6a\xcd\x86\xbb\xd1\x96\xe0\x30\x57\x44\x58\x99\xa1\x13\xb8\x63\x41\x58" "\xbe\x29\x68\xcf\xba\x98\x6b\xfb\x18\x98\xa5\xb3\xca\xdb\xaa\x09\xd7\x40" "\xf1\xf0\x9e\x1b\xf0\x57\xc0\xa2\xf6\x84\x9f\x9a\x96\x84\xe5\xf3\x4b\x23" "\x50\x0d\xe0\x89\xc1\x5b\xcb\x2e\x2d\x00\x52\xd0\x50\x42\xc2\xc0\x1e\xae" "\x12\x49\xb9\xc0\xe2\xf1\x54\x7f\xfb\x85\x87\xb8\x51\x18\x5d\x4e\x01\x23" "\x48\x93\xe6\x61\xe9\x7b\x89\x9c\x9b\x45\xd1\xe4\x67\xcf\xb4\x50\xe6\x99" "\x59\x44\x32\x0d", 4108); *(uint64_t*)0x20000990 = 0x20000100; memcpy((void*)0x20000100, "GPL\000", 4); *(uint32_t*)0x20000998 = 0; *(uint32_t*)0x2000099c = 0; *(uint64_t*)0x200009a0 = 0; *(uint32_t*)0x200009a8 = 0; *(uint32_t*)0x200009ac = 0; memset((void*)0x200009b0, 0, 16); *(uint32_t*)0x200009c0 = 0; *(uint32_t*)0x200009c4 = 0; *(uint32_t*)0x200009c8 = -1; *(uint32_t*)0x200009cc = 8; *(uint64_t*)0x200009d0 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x200009d8 = 8; *(uint32_t*)0x200009dc = 0x10; *(uint64_t*)0x200009e0 = 0x20000000; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x200009e8 = 0x10; *(uint32_t*)0x200009ec = 0; *(uint32_t*)0x200009f0 = -1; *(uint32_t*)0x200009f4 = 0; *(uint64_t*)0x200009f8 = 0; *(uint64_t*)0x20000a00 = 0; *(uint32_t*)0x20000a08 = 0x10; *(uint32_t*)0x20000a0c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000980ul, /*size=*/0x49ul); if (res != -1) r[1] = res; *(uint64_t*)0x200000c0 = 0x20000080; memcpy((void*)0x20000080, "kmem_cache_free\000", 16); *(uint32_t*)0x200000c8 = r[1]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200000c0ul, /*size=*/0x10ul); *(uint32_t*)0x200004c0 = 0x11; *(uint32_t*)0x200004c4 = 0x18; *(uint64_t*)0x200004c8 = 0x200001c0; memcpy((void*)0x200001c0, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb7" "\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf8\xff\x00\x00\x00\x00\xb7\x08" "\x00\x00\x00\x00\x00\x00\x7b\x8a\xf0\xff\x00\x00\x00\x00\xbf\xa1\x00" "\x00\x00\x00\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xbf\xa4\x00\x00" "\x00\x00\x00\x00\x07\x04\x00\x00\xf0\xff\xff\xff\xb7\x02\x00\x00\x00" "\x00\x00\x00\x18\x23\x00\x00", 92); *(uint32_t*)0x2000021c = r[0]; memcpy( (void*)0x20000220, "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x05\x00\x00\x00\x00\x00\x00\x85\x00" "\x00\x00\xa5\x00\x00\x00\x18\x01\x00\x00\x20\x20\x64\x05\x00\x00\x00\x00" "\x00\x20\x20\x20\x7b\x1a\xf8\xff\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00" "\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00" "\xb7\x03\x00\x00\x00\x00\x00\x00\xa5\x00\x00\x00\x08\x00\x00\x00\x95", 89); *(uint64_t*)0x200004d0 = 0x20000600; memcpy((void*)0x20000600, "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 = 0; *(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*)0x200002c0 = 0x20000000; memcpy((void*)0x20000000, "kmem_cache_free\000", 16); *(uint32_t*)0x200002c8 = r[2]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200002c0ul, /*size=*/0x10ul); } 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); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }