On Wed, Oct 05, 2016 at 03:03:46PM -0600, Joseph Bisch wrote:
> While fuzzing next-20160930 with syzkaller I encountered the following:
>
> kernel BUG at fs/direct-io.c:211!
> invalid opcode: 0000 [#1] SMP
Should've been fixed in current -next - it's handling of iov_iter_get_pages()
n ITER_PIPE iterators when they get full; the things to watch for are
a) __pipe_get_pages() containing
size_t n = push_pipe(i, maxsize, &idx, start);
if (!n)
return -EFAULT;
and
b) "consistent treatment of EFAULT on O_DIRECT read/write" applied in
fs/direct-io.c
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