Re: [pipe] d60337eff1: BUG:kernel_NULL_pointer_dereference,address
From: David Howells <dhowells@redhat.com>
Date: 2019-11-15 16:22:39
Also in:
keyrings, linux-api, linux-block, linux-fsdevel, linux-usb, lkml, oe-lkp
Subsystem:
library code, the rest, userspace copyin/copyout (uiovec) · Maintainers:
Andrew Morton, Linus Torvalds, Alexander Viro
Actually, no, this is the fix:
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 7006b5b2106d..be2fc5793ddd 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c@@ -537,7 +537,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size, buf->ops = &default_pipe_buf_ops; buf->page = page; buf->offset = 0; - buf->len = max_t(ssize_t, left, PAGE_SIZE); + buf->len = min_t(ssize_t, left, PAGE_SIZE); left -= buf->len; iter_head++; pipe->head = iter_head;
David