Displaying 1 result from an estimated 1 matches for "pipe_occup".
2019 Dec 05
0
kernel BUG at fs/pipe.c:LINE!
...gt; __poll_t mask;
> struct pipe_inode_info *pipe = filp->private_data;
> unsigned int head = READ_ONCE(pipe->head);
> unsigned int tail = READ_ONCE(pipe->tail);
>
> poll_wait(filp, &pipe->wait, wait);
>
> BUG_ON(pipe_occupancy(head, tail) > pipe->ring_size);
>
> It's not holding the pipe mutex, right? So 'head', 'tail' and 'ring_size' can
> all be changed concurrently, and they aren't read atomically with respect to
> each other.
>
> How do you propose to imp...