Commit c44939ec authored by akpm@linux-foundation.org's avatar akpm@linux-foundation.org Committed by Linus Torvalds

NeilBrown <neilb@suse.de>

The do_loop_readv_writev implementation of readv breaks out of the loop as
soon as a single read request didn't fill it's buffer:

		if (nr != len)
			break;

The generic_file_aio_read version doesn't.  So if it hits EOF before the end
of the list of buffers, it will try again on the next buffer.  If the file was
extended in the mean time, this will produce a bad result.
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5ed44a40
......@@ -1219,6 +1219,8 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
retval = retval ?: desc.error;
break;
}
if (desc.count > 0)
break;
}
}
out:
......
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