| // KMSAN: uninit-value in update_stack_state |
| // https://syzkaller.appspot.com/bug?id=a7fc2861aa440591f8e570dc2532821b67ba7e60 |
| // status:invalid |
| // 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_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[1] = {0xffffffffffffffff}; |
| void loop() |
| { |
| long res = 0; |
| memcpy((void*)0x200e0000, "stack", 6); |
| res = syz_open_procfs(0, 0x200e0000); |
| if (res != -1) |
| r[0] = res; |
| *(uint64_t*)0x2066dff0 = 0x208ad000; |
| *(uint64_t*)0x2066dff8 = 0xb2; |
| syscall(__NR_readv, r[0], 0x2066dff0, 1); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| loop(); |
| return 0; |
| } |