libceph: fix oops in ceph_msg_data_{pages,pagelist}_advance() (d90deda6) · Commits · 戴 / test

net/ceph/messenger.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -919,6 +919,9 @@ static bool ceph_msg_data_pages_advance(struct ceph_msg_data_cursor *cursor,
		if (!bytes \|\| cursor->page_offset)
		return false; /* more bytes to process in the current page */

		if (!cursor->resid)
		return false; /* no more data */

		/* Move on to the next page; offset is already at 0 */

		BUG_ON(cursor->page_index >= cursor->page_count);
		@@ -1004,6 +1007,9 @@ static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor,
		if (!bytes \|\| cursor->offset & ~PAGE_MASK)
		return false; /* more bytes to process in the current page */

		if (!cursor->resid)
		return false; /* no more data */

		/* Move on to the next page */

		BUG_ON(list_is_last(&cursor->page->lru, &pagelist->head));