linux-kernel - [PATCH 4/6] LBS: fix oops in try_to_release

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 21 Sep 2007 21:46:39 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Christoph Lameter <clameter@....com>
cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] LBS: fix oops in try_to_release_page

It's uncommon, but try_to_release_page is sometimes called when
page->mapping is NULL (see the check for mapping further down):
so its VM_BUG_ON(mapping_order(mapping)...) just causes an oops.
There seem to be enough of those checks already, and no special
reason to have one right here: just delete it.

Signed-off-by: Hugh Dickins <hugh@...itas.com>

--- 2.6.23-rc6-lbs/mm/filemap.c	2007-09-11 20:01:08.000000000 +0100
+++ linux/mm/filemap.c	2007-09-14 12:00:06.000000000 +0100
@@ -2247,7 +2247,6 @@ int try_to_release_page(struct page *pag
 	struct address_space * const mapping = page->mapping;
 
 	BUG_ON(!PageLocked(page));
-	VM_BUG_ON(mapping_order(mapping) != page_cache_page_order(page));
 	if (PageWriteback(page))
 		return 0;
 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/