| // INFO: task hung in __generic_file_splice_read |
| // https://syzkaller.appspot.com/bug?id=8e19ba554bec5880000ece8c8fb76ba69291d43d |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t 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); |
| } |
| } |
| |
| #ifndef __NR_memfd_create |
| #define __NR_memfd_create 319 |
| #endif |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| void loop() |
| { |
| long res = 0; |
| memcpy((void*)0x20000100, "/dev/loop#", 11); |
| res = syz_open_dev(0x20000100, 0xbffffffffffffffe, 0x88); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x20000140, "/dev/loop#", 11); |
| res = syscall(__NR_memfd_create, 0x20000140, 0); |
| if (res != -1) |
| r[1] = res; |
| *(uint64_t*)0x20000900 = 0x200009c0; |
| memcpy((void*)0x200009c0, "\x1f", 1); |
| *(uint64_t*)0x20000908 = 1; |
| syscall(__NR_pwritev, r[1], 0x20000900, 1, 0x81a06); |
| syscall(__NR_ioctl, r[0], 0x4c00, r[1]); |
| syscall(__NR_ioctl, r[0], 0x4c06, r[0]); |
| *(uint64_t*)0x20000000 = 0; |
| syscall(__NR_sendfile, r[1], r[0], 0x20000000, 0x20000102000007); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |