| // no output from test machine |
| // https://syzkaller.appspot.com/bug?id=28bc35dd6f026b2878e30804670f6f0c39932f16 |
| // 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); |
| } |
| } |
| |
| static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t a1) |
| { |
| |
| char buf[128]; |
| memset(buf, 0, sizeof(buf)); |
| if (a0 == 0) { |
| snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); |
| } else if (a0 == (uintptr_t)-1) { |
| snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); |
| } else { |
| snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); |
| } |
| int fd = open(buf, O_RDWR); |
| if (fd == -1) |
| fd = open(buf, O_RDONLY); |
| return fd; |
| } |
| |
| uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff}; |
| void loop() |
| { |
| long res = 0; |
| memcpy((void*)0x200000c0, "/dev/loop#", 11); |
| res = syz_open_dev(0x200000c0, 4, 0); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x20000100, "/dev/loop#", 11); |
| res = syz_open_dev(0x20000100, 0, 0); |
| if (res != -1) |
| r[1] = res; |
| memcpy((void*)0x20000140, "/dev/loop#", 11); |
| res = syz_open_dev(0x20000140, 4, 2); |
| if (res != -1) |
| r[2] = res; |
| memcpy((void*)0x20000280, "net/raw", 8); |
| res = syz_open_procfs(0, 0x20000280); |
| if (res != -1) |
| r[3] = res; |
| syscall(__NR_ioctl, r[0], 0x4c00, r[3]); |
| syscall(__NR_ioctl, r[0], 0x4c06, r[2]); |
| syscall(__NR_ioctl, r[1], 0x4c00, r[0]); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |