| // BUG: assuming atomic context at net/kcm/kcmsock.c:LINE |
| // https://syzkaller.appspot.com/bug?id=ab233393413e529d0dc223eed9cdb6888857c666 |
| // 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 <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> |
| |
| 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; |
| } |
| } |
| } |
| |
| #ifndef __NR_bpf |
| #define __NR_bpf 321 |
| #endif |
| |
| uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| intptr_t res = 0; |
| res = syscall(__NR_socket, 2, 1, 0); |
| if (res != -1) |
| r[0] = res; |
| *(uint16_t*)0x20e5b000 = 2; |
| *(uint16_t*)0x20e5b002 = htobe16(0x4e20); |
| *(uint32_t*)0x20e5b004 = htobe32(0xe0000001); |
| syscall(__NR_bind, r[0], 0x20e5b000, 0x10); |
| *(uint16_t*)0x20ccb000 = 2; |
| *(uint16_t*)0x20ccb002 = htobe16(0x4e20); |
| *(uint32_t*)0x20ccb004 = htobe32(0); |
| syscall(__NR_connect, r[0], 0x20ccb000, 0x10); |
| *(uint32_t*)0x20000100 = 1; |
| *(uint32_t*)0x20000104 = 3; |
| *(uint64_t*)0x20000108 = 0x209ff000; |
| *(uint8_t*)0x209ff000 = 0x18; |
| STORE_BY_BITMASK(uint8_t, , 0x209ff001, 0, 0, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x209ff001, 0, 4, 4); |
| *(uint16_t*)0x209ff002 = 0; |
| *(uint32_t*)0x209ff004 = 0; |
| *(uint8_t*)0x209ff008 = 0; |
| *(uint8_t*)0x209ff009 = 0; |
| *(uint16_t*)0x209ff00a = 0; |
| *(uint32_t*)0x209ff00c = 0; |
| *(uint8_t*)0x209ff010 = 0x95; |
| *(uint8_t*)0x209ff011 = 0; |
| *(uint16_t*)0x209ff012 = 0; |
| *(uint32_t*)0x209ff014 = 0; |
| *(uint64_t*)0x20000110 = 0x202bf000; |
| memcpy((void*)0x202bf000, "syzkaller\000", 10); |
| *(uint32_t*)0x20000118 = 4; |
| *(uint32_t*)0x2000011c = 0xb7; |
| *(uint64_t*)0x20000120 = 0x20000040; |
| *(uint32_t*)0x20000128 = 0; |
| *(uint32_t*)0x2000012c = 0; |
| *(uint8_t*)0x20000130 = 0; |
| *(uint8_t*)0x20000131 = 0; |
| *(uint8_t*)0x20000132 = 0; |
| *(uint8_t*)0x20000133 = 0; |
| *(uint8_t*)0x20000134 = 0; |
| *(uint8_t*)0x20000135 = 0; |
| *(uint8_t*)0x20000136 = 0; |
| *(uint8_t*)0x20000137 = 0; |
| *(uint8_t*)0x20000138 = 0; |
| *(uint8_t*)0x20000139 = 0; |
| *(uint8_t*)0x2000013a = 0; |
| *(uint8_t*)0x2000013b = 0; |
| *(uint8_t*)0x2000013c = 0; |
| *(uint8_t*)0x2000013d = 0; |
| *(uint8_t*)0x2000013e = 0; |
| *(uint8_t*)0x2000013f = 0; |
| *(uint32_t*)0x20000140 = 0; |
| *(uint32_t*)0x20000144 = 0; |
| *(uint32_t*)0x20000148 = -1; |
| *(uint32_t*)0x2000014c = 8; |
| *(uint64_t*)0x20000150 = 0x20000000; |
| *(uint32_t*)0x20000000 = 0; |
| *(uint32_t*)0x20000004 = 0; |
| *(uint32_t*)0x20000158 = 0; |
| *(uint32_t*)0x2000015c = 0x10; |
| *(uint64_t*)0x20000160 = 0x20000000; |
| *(uint32_t*)0x20000000 = 0; |
| *(uint32_t*)0x20000004 = 0; |
| *(uint32_t*)0x20000008 = 0; |
| *(uint32_t*)0x2000000c = 0; |
| *(uint32_t*)0x20000168 = 0; |
| res = syscall(__NR_bpf, 5, 0x20000100, 0x48); |
| if (res != -1) |
| r[1] = res; |
| res = syscall(__NR_socket, 0x29, 0x1000000000002, 0); |
| if (res != -1) |
| r[2] = res; |
| *(uint32_t*)0x2031aff8 = r[0]; |
| *(uint32_t*)0x2031affc = r[1]; |
| syscall(__NR_ioctl, r[2], 0x89e0, 0x2031aff8); |
| *(uint64_t*)0x20000240 = 0; |
| *(uint32_t*)0x20000248 = 0; |
| *(uint64_t*)0x20000250 = 0x20000180; |
| *(uint64_t*)0x20000180 = 0x20000480; |
| memcpy((void*)0x20000480, "_", 1); |
| *(uint64_t*)0x20000188 = 1; |
| *(uint64_t*)0x20000258 = 1; |
| *(uint64_t*)0x20000260 = 0; |
| *(uint64_t*)0x20000268 = 0; |
| *(uint32_t*)0x20000270 = 0; |
| syscall(__NR_sendmsg, r[2], 0x20000240, 0); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |