Messages in this thread Patch in this message | | | From | Andrew Yang <> | Subject | [PATCH v2] mm/writeback: fix dereferencing NULL mapping->host | Date | Wed, 30 Nov 2022 16:23:02 +0800 |
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From: "andrew.yang" <andrew.yang@mediatek.com>
Check before dereferencing mapping->host
Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: andrew.yang <andrew.yang@mediatek.com> --- v2: add parenthesis --- include/trace/events/writeback.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 86b2a82da546..54e353c9f919 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -68,7 +68,7 @@ DECLARE_EVENT_CLASS(writeback_folio_template, strscpy_pad(__entry->name, bdi_dev_name(mapping ? inode_to_bdi(mapping->host) : NULL), 32); - __entry->ino = mapping ? mapping->host->i_ino : 0; + __entry->ino = (mapping && mapping->host) ? mapping->host->i_ino : 0; __entry->index = folio->index; ), -- 2.18.0
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