| // WARNING in __snd_rawmidi_transmit_ack (2) |
| // https://syzkaller.appspot.com/bug?id=5e794587e5bb5e30cf1458538768c0800209de5e |
| // 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() |
| { |
| 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 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(); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop() |
| { |
| 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[1] = {0xffffffffffffffff}; |
| |
| void execute_one() |
| { |
| long res = 0; |
| memcpy((void*)0x20000080, "/dev/dmmidi#", 13); |
| res = syz_open_dev(0x20000080, 0x34, 1); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x200002c0, |
| "\x2a\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03" |
| "\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x00\x00\x00\xb4\x8e\x92\x5d\x4b\xfd\xed\x33\x9b" |
| "\x2f\x58\x0d\x1f\x3b\x86\x4b\x70\xe0\xc0\x99\xad\x88\x23\xd8\xa4\x4c" |
| "\x0c\x6a\xcf\x51\x56\x33\x22\x75\xcf\xaf\xcc\xdc\xe2\xc6\x15\x53\x01" |
| "\xc3\xc8\xa5\x54\x27\x48\xa5\x30\xbf\xc1\x3d\x1f\x29\xf8\x32\xe6\x68" |
| "\xbf\x83\x72\x2f\xd5\xcd\x41\x55\x1c\x62\x44\x5c\xfb\xf9\x71\xe2\xf7" |
| "\xb2\x36\x2a\x85\x5f\xa5\x2e\x1b\x3c\xcd\x70\x41\xab\xbe\x76\x6a\xff" |
| "\x11\x07\x75\xfa\x4c\x3e\x32\xe3\x26\xc4\x01\x17\x03\xcc\x8a\x83\x6e" |
| "\xfd\x82\xce\xd0\x6d\x7e\xff\x77\xff\x0c\x89\xda\xf1\x70\x52\x12\xf7" |
| "\xe3\x98\x5b\xcc\x7d\xb3\x4f\xa0\x16\xee\xfb\x7c\x53\x60\x8b\x8c\x7e" |
| "\x02\x36\xad\xca\xe0\x0b\x83\x1b\x38\x12\x1b\x13\x7a\xb9\x8b\xc4\x4e" |
| "\x08\xe3\x06\x3b\xb7\xa7\xba", |
| 211); |
| syscall(__NR_write, r[0], 0x200002c0, 0xd3); |
| syscall(__NR_ioctl, r[0], 0x2000000040045730, 0x20000000); |
| } |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (procid = 0; procid < 8; procid++) { |
| if (fork() == 0) { |
| loop(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |