// https://syzkaller.appspot.com/bug?id=7041324073b32a6a08de78508dbc5756e371a84a // 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_mmap #define __NR_mmap 222 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 211 #endif #ifndef __NR_setsockopt #define __NR_setsockopt 208 #endif #ifndef __NR_socket #define __NR_socket 198 #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; } 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[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_DGRAM*/ 2ul, /*proto=*/0); if (res != -1) r[0] = res; *(uint8_t*)0x200004c0 = 0xac; *(uint8_t*)0x200004c1 = 0x14; *(uint8_t*)0x200004c2 = 0x14; *(uint8_t*)0x200004c3 = 0xbb; *(uint32_t*)0x200004d0 = htobe32(-1); *(uint16_t*)0x200004e0 = htobe16(0); *(uint16_t*)0x200004e2 = htobe16(0); *(uint16_t*)0x200004e4 = htobe16(0); *(uint16_t*)0x200004e6 = htobe16(0); *(uint16_t*)0x200004e8 = 0xa; *(uint8_t*)0x200004ea = 0; *(uint8_t*)0x200004eb = 0; *(uint8_t*)0x200004ec = 0; *(uint32_t*)0x200004f0 = 0; *(uint32_t*)0x200004f4 = 0; *(uint64_t*)0x200004f8 = 0; *(uint64_t*)0x20000500 = 0; *(uint64_t*)0x20000508 = 0; *(uint64_t*)0x20000510 = 0; *(uint64_t*)0x20000518 = 0; *(uint64_t*)0x20000520 = 0; *(uint64_t*)0x20000528 = 0x9d; *(uint64_t*)0x20000530 = 0; *(uint64_t*)0x20000538 = 0; *(uint64_t*)0x20000540 = 0; *(uint64_t*)0x20000548 = 0; *(uint64_t*)0x20000550 = 0; *(uint32_t*)0x20000558 = 0; *(uint32_t*)0x2000055c = 0; *(uint8_t*)0x20000560 = 0; *(uint8_t*)0x20000561 = 0; *(uint8_t*)0x20000562 = 0; *(uint8_t*)0x20000563 = 0; *(uint8_t*)0x20000568 = -1; *(uint8_t*)0x20000569 = 2; memset((void*)0x2000056a, 0, 13); *(uint8_t*)0x20000577 = 1; *(uint32_t*)0x20000578 = htobe32(0); *(uint8_t*)0x2000057c = 0x2b; *(uint16_t*)0x20000580 = 0; *(uint32_t*)0x20000584 = htobe32(0); *(uint32_t*)0x20000594 = 0; *(uint8_t*)0x20000598 = 4; *(uint8_t*)0x20000599 = 0; *(uint8_t*)0x2000059a = 0; *(uint32_t*)0x2000059c = 0; *(uint32_t*)0x200005a0 = 0; *(uint32_t*)0x200005a4 = 0; syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x29, /*optname=*/0x23, /*optval=*/0x200004c0ul, /*optlen=*/0xe8ul); res = syscall(__NR_socket, /*domain=*/0xful, /*type=*/3ul, /*proto=*/2); if (res != -1) r[1] = res; *(uint32_t*)0x200001c0 = 0; syscall(__NR_setsockopt, /*fd=*/r[1], /*level=*/1, /*optname=SO_RCVBUF*/ 8, /*optval=*/0x200001c0ul, /*optlen=*/4ul); *(uint64_t*)0x20000180 = 0; *(uint32_t*)0x20000188 = 0; *(uint64_t*)0x20000190 = 0x20000000; *(uint64_t*)0x20000000 = 0x200005c0; memcpy((void*)0x200005c0, "\x02\x0b\x00\x01\x02", 5); *(uint64_t*)0x20000008 = 0x10; *(uint64_t*)0x20000198 = 1; *(uint64_t*)0x200001a0 = 0; *(uint64_t*)0x200001a8 = 0; *(uint32_t*)0x200001b0 = 0; syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x20000180ul, /*f=*/0ul); *(uint64_t*)0x200000c0 = 0; *(uint32_t*)0x200000c8 = 0; *(uint64_t*)0x200000d0 = 0x20000380; *(uint64_t*)0x20000380 = 0x20000240; memcpy((void*)0x20000240, "\x02\x12\x00\x00\x02", 5); *(uint64_t*)0x20000388 = 0x10; *(uint64_t*)0x200000d8 = 1; *(uint64_t*)0x200000e0 = 0; *(uint64_t*)0x200000e8 = 0; *(uint32_t*)0x200000f0 = 0; syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000c0ul, /*f=*/0ul); res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/6); if (res != -1) r[2] = res; res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/6); if (res != -1) r[3] = res; *(uint64_t*)0x20000580 = 0; *(uint32_t*)0x20000588 = 0; *(uint64_t*)0x20000590 = 0x20000180; *(uint64_t*)0x20000180 = 0x20000000; memcpy((void*)0x20000000, "\xb8\x00\x00\x00\x13\x00\xe9\x99\x00\x00\x00\x00\x00\x00\x00\x00\xfc" "\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\xac\x1e" "\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x0a\x00\x60", 59); *(uint64_t*)0x20000188 = 0xb8; *(uint64_t*)0x20000598 = 1; *(uint64_t*)0x200005a0 = 0; *(uint64_t*)0x200005a8 = 0; *(uint32_t*)0x200005b0 = 0; syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x20000580ul, /*f=*/0ul); res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/6); if (res != -1) r[4] = res; *(uint64_t*)0x20000580 = 0; *(uint32_t*)0x20000588 = 0; *(uint64_t*)0x20000590 = 0x20000180; *(uint64_t*)0x20000180 = 0x20000000; memcpy((void*)0x20000000, "\xb8\x00\x00\x00\x13\x00\xe9\x99\x00\x00\x00\x00\x00\x00\x00\x00\xfc" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xac\x1e" "\x00\x01\x82\x15\x01\xf6\x3e\xd0\x2a\x17\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x0a\x00\x60\x30", 60); *(uint64_t*)0x20000188 = 0xb8; *(uint64_t*)0x20000598 = 1; *(uint64_t*)0x200005a0 = 0; *(uint64_t*)0x200005a8 = 0; *(uint32_t*)0x200005b0 = 0x80; syscall(__NR_sendmsg, /*fd=*/r[4], /*msg=*/0x20000580ul, /*f=*/0ul); *(uint64_t*)0x20000580 = 0; *(uint32_t*)0x20000588 = 0; *(uint64_t*)0x20000590 = 0x20000180; *(uint64_t*)0x20000180 = 0x20000000; memcpy((void*)0x20000000, "\xb8\x00\x00\x00\x13\x00\xe9\x99\x00\x00\x00\x00\x00\x00\x00\x00\xfc" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xac\x1e" "\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x0a\x00\x40\x00\x00\x00", 62); *(uint64_t*)0x20000188 = 0xb8; *(uint64_t*)0x20000598 = 1; *(uint64_t*)0x200005a0 = 0; *(uint64_t*)0x200005a8 = 0; *(uint32_t*)0x200005b0 = 0; syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x20000580ul, /*f=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }