| // general protection fault in __vb2_queue_free |
| // https://syzkaller.appspot.com/bug?id=a0b1ded4de6e7a884ef07e8ea173a10471f3e663 |
| // status:open |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <setjmp.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/prctl.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| unsigned long long procid; |
| |
| static __thread int skip_segv; |
| static __thread jmp_buf segv_env; |
| |
| static void segv_handler(int sig, siginfo_t* info, void* ctx) |
| { |
| uintptr_t addr = (uintptr_t)info->si_addr; |
| const uintptr_t prog_start = 1 << 20; |
| const uintptr_t prog_end = 100 << 20; |
| if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && |
| (addr < prog_start || addr > prog_end)) { |
| _longjmp(segv_env, 1); |
| } |
| exit(sig); |
| } |
| |
| static void install_segv_handler(void) |
| { |
| struct sigaction sa; |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_handler = SIG_IGN; |
| syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); |
| syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_sigaction = segv_handler; |
| sa.sa_flags = SA_NODEFER | SA_SIGINFO; |
| sigaction(SIGSEGV, &sa, NULL); |
| sigaction(SIGBUS, &sa, NULL); |
| } |
| |
| #define NONFAILING(...) \ |
| { \ |
| __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| if (_setjmp(segv_env) == 0) { \ |
| __VA_ARGS__; \ |
| } \ |
| __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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); |
| int i; |
| for (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; |
| for (iter = 0;; 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 < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| } |
| } |
| |
| uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| intptr_t res = 0; |
| NONFAILING(*(uint32_t*)0x20000040 = 1); |
| NONFAILING(*(uint32_t*)0x20000044 = 0x70); |
| NONFAILING(*(uint8_t*)0x20000048 = 0); |
| NONFAILING(*(uint8_t*)0x20000049 = 0); |
| NONFAILING(*(uint8_t*)0x2000004a = 0); |
| NONFAILING(*(uint8_t*)0x2000004b = 0); |
| NONFAILING(*(uint32_t*)0x2000004c = 0); |
| NONFAILING(*(uint64_t*)0x20000050 = 0x50d); |
| NONFAILING(*(uint64_t*)0x20000058 = 0); |
| NONFAILING(*(uint64_t*)0x20000060 = 0); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 0, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 1, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 2, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 3, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 4, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 5, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 6, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 7, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 8, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 9, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 10, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 11, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 12, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 13, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 14, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 15, 2)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 17, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 18, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 19, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 20, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 21, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 22, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 23, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 24, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 25, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 26, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 27, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 28, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000068, 0, 29, 35)); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint64_t*)0x20000078 = 0); |
| NONFAILING(*(uint64_t*)0x20000080 = 0); |
| NONFAILING(*(uint64_t*)0x20000088 = 0); |
| NONFAILING(*(uint64_t*)0x20000090 = 0); |
| NONFAILING(*(uint32_t*)0x20000098 = 0); |
| NONFAILING(*(uint32_t*)0x2000009c = 0); |
| NONFAILING(*(uint64_t*)0x200000a0 = 0); |
| NONFAILING(*(uint32_t*)0x200000a8 = 0); |
| NONFAILING(*(uint16_t*)0x200000ac = 0); |
| NONFAILING(*(uint16_t*)0x200000ae = 0); |
| syscall(__NR_perf_event_open, 0x20000040, 0, 0, -1, 0); |
| NONFAILING(memcpy((void*)0x200000c0, "/dev/video35\000", 13)); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200000c0, 2, 0); |
| if (res != -1) |
| r[0] = res; |
| NONFAILING(*(uint32_t*)0x20000480 = 0); |
| NONFAILING(*(uint32_t*)0x20000484 = 0xfffffffd); |
| NONFAILING(*(uint32_t*)0x20000488 = 2); |
| NONFAILING(*(uint32_t*)0x20000490 = 2); |
| NONFAILING(memcpy( |
| (void*)0x20000498, |
| "\xc5\xd5\x7e\x14\x09\xc8\xc8\xbf\xc4\xb0\xa6\xa4\x86\xe6\x75\x9e\xc6\xb7" |
| "\x17\x94\xff\x0a\xdc\x9e\xe3\x76\xa4\x08\x07\xfd\xd9\x77\x4a\xec\xe3\xe8" |
| "\xb9\x5d\xa3\x4e\xe1\x75\xd3\x52\x9b\xc0\x3c\x34\x01\xcb\xd4\x67\xe3\xa0" |
| "\x0b\x3f\x56\x5d\x83\xfc\xda\xa1\x8e\x13\x64\x95\x41\x92\xaa\x37\xc8\xb5" |
| "\xd5\x2d\xe4\xdf\x78\xb6\xea\x9e\x89\xa2\xc1\x3f\x92\xb9\xf7\x65\x0b\x89" |
| "\xfd\xf1\x2c\xa7\xc4\x87\x62\xbc\x81\x64\x6f\x92\xb9\xf2\x27\x0c\x1a\x32" |
| "\x4c\x98\x20\xfd\x05\x25\xa8\xc3\x81\xce\xd9\x42\x47\xdf\xa0\x6a\x93\x62" |
| "\xcd\xad\xe3\x6c\x5e\xe4\xe0\x46\x32\x88\xdc\xed\x37\x88\x01\xa8\xda\xd7" |
| "\x13\x03\x6e\xcf\xa5\x1a\xdd\x03\x33\x7e\x4c\xc1\xd3\xd7\xcd\xea\x59\x9d" |
| "\x98\x66\x41\x33\x44\x04\xb6\x7b\xd6\x60\xb0\x34\xeb\xd5\x65\xd3\x06\xb6" |
| "\x51\xd8\xb3\xa7\xd0\x52\x56\xfd\x53\x03\x99\x28\x49\x8f\x4a\xa4\x80\x44" |
| "\x81\x83", |
| 200)); |
| NONFAILING(*(uint32_t*)0x20000560 = 0); |
| NONFAILING(*(uint32_t*)0x20000564 = 0); |
| NONFAILING(*(uint32_t*)0x20000568 = 0); |
| NONFAILING(*(uint32_t*)0x2000056c = 0); |
| NONFAILING(*(uint32_t*)0x20000570 = 0); |
| NONFAILING(*(uint32_t*)0x20000574 = 0); |
| NONFAILING(*(uint32_t*)0x20000578 = 0); |
| NONFAILING(*(uint32_t*)0x2000057c = 0); |
| syscall(__NR_ioctl, r[0], 0xc100565c, 0x20000480); |
| NONFAILING(*(uint32_t*)0x200001c0 = 0); |
| NONFAILING(*(uint32_t*)0x200001c4 = 0x7fff); |
| NONFAILING(*(uint32_t*)0x200001c8 = 1); |
| NONFAILING(*(uint32_t*)0x200001d0 = 2); |
| NONFAILING(*(uint32_t*)0x200001d8 = 0xff); |
| NONFAILING(*(uint32_t*)0x200001dc = 0xff); |
| NONFAILING(*(uint32_t*)0x200001e0 = 5); |
| NONFAILING(*(uint32_t*)0x200001e4 = 0x32315241); |
| NONFAILING(*(uint32_t*)0x200001e8 = 0xd512); |
| NONFAILING(*(uint32_t*)0x200001ec = 0x5a2e00bc); |
| NONFAILING(*(uint32_t*)0x200001f0 = 7); |
| NONFAILING(*(uint32_t*)0x200001f4 = 0x384024fc); |
| NONFAILING(*(uint32_t*)0x200001f8 = 0x13a); |
| NONFAILING(*(uint32_t*)0x200001fc = 0); |
| NONFAILING(*(uint32_t*)0x20000200 = 0); |
| NONFAILING(*(uint32_t*)0x200002a0 = 0); |
| NONFAILING(*(uint32_t*)0x200002a4 = 0); |
| NONFAILING(*(uint32_t*)0x200002a8 = 0); |
| NONFAILING(*(uint32_t*)0x200002ac = 0); |
| NONFAILING(*(uint32_t*)0x200002b0 = 0); |
| NONFAILING(*(uint32_t*)0x200002b4 = 0); |
| NONFAILING(*(uint32_t*)0x200002b8 = 0); |
| NONFAILING(*(uint32_t*)0x200002bc = 0); |
| syscall(__NR_ioctl, r[0], 0xc100565c, 0x200001c0); |
| syscall(__NR_splice, -1, 0, -1, 0, 0x100000000000a, 2); |
| NONFAILING(memcpy((void*)0x20000200, "/dev/loop-control\000", 18)); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000200, 0, 0); |
| if (res != -1) |
| r[1] = res; |
| syscall(__NR_openat, 0xffffffffffffff9c, 0, 0, 0); |
| syscall(__NR_fcntl, -1, 8, 0); |
| syscall(__NR_ioctl, r[1], 0x4c82, 0); |
| syscall(__NR_ioctl, -1, 0x40345410, 0); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0, 0, 0); |
| if (res != -1) |
| r[2] = res; |
| NONFAILING(*(uint32_t*)0x20000340 = 0); |
| syscall(__NR_getsockopt, r[2], 0x84, 0x12, 0, 0x20000340); |
| syscall(__NR_ioctl, -1, 0x40345410, 0); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| install_segv_handler(); |
| for (procid = 0; procid < 6; procid++) { |
| if (fork() == 0) { |
| loop(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |