Messages in this thread Patch in this message | | | From | Oscar Salvador <> | Subject | [PATCH v2] mm: Fix __dump_page when mapping->host is not set | Date | Mon, 18 Mar 2019 08:29:31 +0100 |
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Swap mapping->host is NULL, so let us protect __dump_page() for such cases.
Fixes: 1c6fb1d89e73c ("mm: print more information about mapping in __dump_page") Signed-off-by: Oscar Salvador <osalvador@suse.de> Acked-by: Michal Hocko <mhocko@suse.com> --- mm/debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/debug.c b/mm/debug.c index c0b31b6c3877..7759f12a8fbb 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -79,7 +79,7 @@ void __dump_page(struct page *page, const char *reason) pr_warn("ksm "); else if (mapping) { pr_warn("%ps ", mapping->a_ops); - if (mapping->host->i_dentry.first) { + if (mapping->host && mapping->host->i_dentry.first) { struct dentry *dentry; dentry = container_of(mapping->host->i_dentry.first, struct dentry, d_u.d_alias); pr_warn("name:\"%pd\" ", dentry); -- 2.13.7
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