// https://syzkaller.appspot.com/bug?id=15631d6cf59940a001754b2b197c208abc798221 // 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[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0xae01, /*type=*/0ul); res = syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0xae01, /*type=*/0ul); if (res != -1) r[0] = res; syscall(__NR_dup, /*oldfd=*/r[0]); syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul); syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0ul, /*size=*/0ul); res = syscall(__NR_socket, /*domain=*/0x11ul, /*type=SOCK_RAW*/ 3ul, /*proto=*/0x300); if (res != -1) r[1] = res; syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933, /*arg=*/0ul); syscall(__NR_sendto, /*fd=*/r[1], /*buf=*/0ul, /*len=*/0ul, /*f=*/0xcc860a5d00000000ul, /*addr=*/0ul, /*addrlen=*/0ul); *(uint32_t*)0x20000980 = 0x11; *(uint32_t*)0x20000984 = 8; *(uint64_t*)0x20000988 = 0x200028c0; memcpy( (void*)0x200028c0, "\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\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\x00\x2d\x75\x59\x3a\x28" "\x6c\xec\xc9\x3e\x64\xc2\x27\xc9\x5a\xa0\xb7\x84\x62\x57\x04\xf0\x7a\x72" 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"\x9c\x95\xc2\x5a\x57\x3d\xc2\xed\xca\xea\x2b\x1a\x52\x49\x6d\xfc\xaf\x99" "\x43\x14\x12\xfd\x13\x4a\x99\x63\x82\xa1\xa0\x4d\x5b\xb9\x24\xcf\xe5\xf3" "\x18\x54\x18\xd6\x05\xff\xff\x9c\x4d\x2e\xc7\xc3\x2f\x20\x95\xe6\x3c\x80" "\xaf\xf9\xfa\x74\x0b\x5b\x76\x32\xf3\x20\x30\x91\x6f\x89\xc6\xda\xd7\x60" "\x3f\x2b\xa2\xa7\x90\xd6\x2d\x6f\xae\xc2\xfe\xd4\x4d\xa4\x92\x8b\x30\x14" "\x2b\xa1\x1d\xe6\xc5\xd5\x0b\x83\xba\xe6\x13\x40\x22\x16\xb5\x05\x4d\x1e" "\x7c\x13\xb1\x35\x5d\x6f\x4a\x82\x45\xff\xa4\x99\x7d\xa9\xc7\x7a\xf4\xc0" "\xeb\x97\xfc\xa5\x85\xec\x6b\xf5\x83\x51\xd5\x64\xbe\xb6\xd9\x52\xaa\xb9" "\xc7\x07\x64\xb0\xa8\xc0\x58\x3c\x90\xb3\x43\x3b\x80\x9b\xdb\x9f\xbd\x48" "\xbc\x87\x34\x95\xcb\xff\x90\x32\x6e\xea\x31\xae\x4e\x0f\x75\x05\xeb\xf6" "\xc9\xd1\x33\x01\x00\x00\x00\xce\x1a\x84\x52\x1f\x14\x51\x8c\x9b\x47\x6f" "\xcc\xbd\x6c\x71\x20\x16\x21\x98\x48\x62\x4b\x87\xce\xc2\xdb\xe9\x82\x23" "\xa0\xeb\x4f\xa3\x9f\x6b\x5c\x02\xe6\xd6\xd9\x07\x56\xff\x57\x90\x2a\x8f" "\x57\x00\x00\x00\x00\x97\x00\xcf\x0b\x4b\x8b\xc2\x29\x41\x33\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x10\x00\x8b\xc0\xd9\x55\x97\x11\xe6\xe8\x86\x1c\x46\x49\x5b\xa5" "\x85\xa4\xb2\xd0\x2e\xdc\x3e\x28\xdd\x27\x1c\x89\x62\x49\xed\x85\xb9\x80" "\x68\x0b\x00\x00\x2b\x43\x5a\xc1\x5f\xc0\x28\x8d\x9b\x2a\x16\x9c\xdc\xac" "\xc4\x13\x03\x8d\xaf\xb7\xa2\xc8\xcb\x48\x2b\xac\x0a\xc5\x02\xd9\xba\x96" "\xff\xff\xff\x7f\x00\x00\x10\x00\x00\x00\x00\x00\x00\x7d\x5a\xd8\x97\xef" "\x3b\x7c\xda\x42\x01\x3d\x53\x04\x6d\xa2\x1b\x40\x21\x6e\x14\xba\x2d\x6a" "\xd5\x65\x6b\xff\xf1\x7a\xdd\xae\xda\xb2\x5b\x30\x00\x2a\xbb\xba\x7f\xa7" "\x25\xf3\x84\x00\xbe\x7c\x1f\x00\x1b\x2c\xd3\x17\x90\x2f\x19\xe3\x85\xbe" "\x9e\x48\xdc\xcf\xf7\x29\x43\x32\x82\x83\x06\x89\xda\x6b\x53\xb2\x63\x33" "\x98\x63\x29\x77\x71\x42\x9d\x12\x00\x00\x00\x33\x41\xbf\x4a\xba\xca\xc9" "\x59\x00\xfc\xa0\x49\x3c\xf2\x9b\x33\xdc\xc9\xff\xff\xff\xff\xff\xff\xff" 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"\x31\x74\xb6\x7d\x18\x86\xe3\xe4\x16\xe1\x66\x91\xdf\x74\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\x00\x71\xd8\xad\xa6\x21\x9d\x97\xf8\xa0\xd0\x7d\x96\x3b\xde\x54" "\x10\x5c\xbc\x28\x87\x47\xf7\xed\x6f\x6a\x78\xe0\xf1\xc2\xfd\x19\xd0\x50" "\xa9\x6e\x42\x03\x97\xa8\x3b\x94\x7e\x64\x91\x4e\xc8\x63\xef\x41\x2e\x4f" "\xd5\x4a\xcb\x14\xf3\xe9\x53\x72\x85\xab\x7f\xee\x13\x48\xf6\xd9\x6d\xb9" "\x1f\x10\x24\xd8\x3f\x59\x0f\x02\x86\x94\xf6\x33\xf5\x26\x23\x06\x31\x99" "\xfa\x8f\x4a\x46\x19\x60\x80\x5a\x6d\x30\xf8\xbd\xd0\x49\x84\xeb\x5a\x03" "\x0c\xa5\x98\xea\xe2\x62\x48\x6c\x47\xe1\x0f\x7c\x80\xea\x18\x5a\x5e" "\x1d", 3942); *(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[2] = res; *(uint64_t*)0x20000040 = 0x20000100; memcpy((void*)0x20000100, "sys_enter\000", 10); *(uint32_t*)0x20000048 = r[2]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000040ul, /*size=*/0x10ul); syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0ul, /*size=*/0ul); syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0ul, /*size=*/0ul); *(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[3] = res; *(uint32_t*)0x20000480 = r[3]; syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x20000480ul, /*size=*/4ul); *(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[3]; 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 = 0x25; *(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[4] = res; *(uint64_t*)0x200001c0 = 0x20000000; memcpy((void*)0x20000000, "kfree\000", 6); *(uint32_t*)0x200001c8 = r[4]; syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200001c0ul, /*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; }