| // KASAN: use-after-free Read in __rhashtable_lookup (2) |
| // https://syzkaller.appspot.com/bug?id=1f0fc473c0dd243a6b72b1b802dde6950fd14c68 |
| // status:fixed |
| // 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 <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 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_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) |
| |
| #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ |
| (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) |
| |
| #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ |
| if ((bf_off) == 0 && (bf_len) == 0) { \ |
| *(type*)(addr) = (type)(val); \ |
| } else { \ |
| type new_val = *(type*)(addr); \ |
| new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ |
| new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ |
| *(type*)(addr) = new_val; \ |
| } |
| |
| static long syz_open_dev(long a0, long a1, long a2) |
| { |
| if (a0 == 0xc || a0 == 0xb) { |
| char buf[128]; |
| sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, |
| (uint8_t)a2); |
| return open(buf, O_RDWR, 0); |
| } else { |
| char buf[1024]; |
| char* hash; |
| strncpy(buf, (char*)a0, sizeof(buf) - 1); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| 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) { |
| } |
| } |
| |
| #define SYZ_HAVE_SETUP_TEST 1 |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| } |
| |
| #define SYZ_HAVE_RESET_TEST 1 |
| static void reset_test() |
| { |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| } |
| |
| 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(); |
| reset_test(); |
| 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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| long res = 0; |
| memcpy((void*)0x20000080, "/dev/vcs", 9); |
| syscall(__NR_openat, 0xffffffffffffff9c, 0x20000080, 0, 0); |
| *(uint32_t*)0x2001d000 = 1; |
| *(uint32_t*)0x2001d004 = 0x70; |
| *(uint8_t*)0x2001d008 = 0; |
| *(uint8_t*)0x2001d009 = 0; |
| *(uint8_t*)0x2001d00a = 0; |
| *(uint8_t*)0x2001d00b = 0; |
| *(uint32_t*)0x2001d00c = 0; |
| *(uint64_t*)0x2001d010 = 0x7f; |
| *(uint64_t*)0x2001d018 = 0; |
| *(uint64_t*)0x2001d020 = 0; |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0x2000000, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 29, 35); |
| *(uint32_t*)0x2001d030 = 0; |
| *(uint32_t*)0x2001d034 = 0; |
| *(uint64_t*)0x2001d038 = 0x20abe000; |
| *(uint64_t*)0x2001d040 = 0; |
| *(uint64_t*)0x2001d048 = 0; |
| *(uint64_t*)0x2001d050 = 0; |
| *(uint32_t*)0x2001d058 = 0; |
| *(uint32_t*)0x2001d05c = 0; |
| *(uint64_t*)0x2001d060 = 0; |
| *(uint32_t*)0x2001d068 = 0; |
| *(uint16_t*)0x2001d06c = 0; |
| *(uint16_t*)0x2001d06e = 0; |
| syscall(__NR_perf_event_open, 0x2001d000, 0, -1, -1, 0); |
| memcpy((void*)0x200000c0, "/dev/snd/pcmC#D#p", 18); |
| res = syz_open_dev(0x200000c0, 0, 0); |
| if (res != -1) |
| r[0] = res; |
| res = syscall(__NR_socket, 0x40000000015, 5, 0); |
| if (res != -1) |
| r[1] = res; |
| *(uint32_t*)0x200007c0 = 2; |
| syscall(__NR_setsockopt, r[1], 0x114, 8, 0x200007c0, 4); |
| *(uint16_t*)0x200002c0 = 2; |
| *(uint16_t*)0x200002c2 = htobe16(0x4e1c); |
| *(uint8_t*)0x200002c4 = 0xac; |
| *(uint8_t*)0x200002c5 = 0x14; |
| *(uint8_t*)0x200002c6 = 0x14; |
| *(uint8_t*)0x200002c7 = 0xbb; |
| *(uint8_t*)0x200002c8 = 0; |
| *(uint8_t*)0x200002c9 = 0; |
| *(uint8_t*)0x200002ca = 0; |
| *(uint8_t*)0x200002cb = 0; |
| *(uint8_t*)0x200002cc = 0; |
| *(uint8_t*)0x200002cd = 0; |
| *(uint8_t*)0x200002ce = 0; |
| *(uint8_t*)0x200002cf = 0; |
| syscall(__NR_bind, r[1], 0x200002c0, 0x10); |
| memcpy((void*)0x20000240, "threaded", 9); |
| syscall(__NR_write, r[0], 0x20000240, 9); |
| *(uint64_t*)0x20000900 = 6; |
| syscall(__NR_ioctl, r[1], 0, 0x20000900); |
| *(uint64_t*)0x20000200 = 0; |
| *(uint64_t*)0x20000208 = 0x1c9c380; |
| syscall(__NR_mq_timedsend, -1, 0x20000040, 0, 0, 0x20000200); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (procid = 0; procid < 8; procid++) { |
| if (fork() == 0) { |
| loop(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |