From: Oscar Salvador <osalvador@suse.de> To: akpm@linux-foundation.org Cc: mhocko@suse.com, anshuman.khandual@arm.com, william.kucharski@oracle.com, hughd@google.com, jack@suse.cz, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador <osalvador@suse.de> Subject: [PATCH v2] mm: Fix __dump_page when mapping->host is not set Date: Mon, 18 Mar 2019 08:29:31 +0100 Message-ID: <20190318072931.29094-1-osalvador@suse.de> (raw) 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
next reply index Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-18 7:29 Oscar Salvador [this message] 2019-03-19 19:21 ` Hugh Dickins
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190318072931.29094-1-osalvador@suse.de \ --to=osalvador@suse.de \ --cc=akpm@linux-foundation.org \ --cc=anshuman.khandual@arm.com \ --cc=hughd@google.com \ --cc=jack@suse.cz \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=mhocko@suse.com \ --cc=william.kucharski@oracle.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
Linux-mm Archive on lore.kernel.org Archives are clonable: git clone --mirror https://lore.kernel.org/linux-mm/0 linux-mm/git/0.git # If you have public-inbox 1.1+ installed, you may # initialize and index your mirror using the following commands: public-inbox-init -V2 linux-mm linux-mm/ https://lore.kernel.org/linux-mm \ linux-mm@kvack.org public-inbox-index linux-mm Example config snippet for mirrors Newsgroup available over NNTP: nntp://nntp.lore.kernel.org/org.kvack.linux-mm AGPL code for this site: git clone https://public-inbox.org/public-inbox.git