Commit d90deda6 authored by Yan, Zheng's avatar Yan, Zheng Committed by Sage Weil

libceph: fix oops in ceph_msg_data_{pages,pagelist}_advance()

When there is no more data, ceph_msg_data_{pages,pagelist}_advance()
should not move on to the next page.
Signed-off-by: default avatarYan, Zheng <zheng.z.yan@intel.com>
parent 5f75ce57
......@@ -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));
......
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