linux-kernel - [PATCH BUGFIX] mm: fix find_get_page() for shmem exceptional entries

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-next>] [day] [month] [year] [list]

Message-ID: <20120207103121.28345.28611.stgit@zurg>
Date:	Tue, 07 Feb 2012 14:31:21 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH BUGFIX] mm: fix find_get_page() for shmem exceptional entries

It should return NULL, otherwise the caller will be very surprised.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
 mm/filemap.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 518223b..ca98cb5 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -693,6 +693,7 @@ repeat:
 			 * here as an exceptional entry: so return it without
 			 * attempting to raise page count.
 			 */
+			page = NULL;
 			goto out;
 		}
 		if (!page_cache_get_speculative(page))

--
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/