linux-kernel - [patch] mmap: feed back correct prev vma when finding vma

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: <CAJd=RBAjGaOXfQQ_NX+ax6=tJJ0eg7EXCFHz3rdvSR3j1K3qHA@mail.gmail.com>
Date:	Thu, 9 Aug 2012 20:21:37 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Hugh Dickins <hughd@...gle.com>,
	Mikulas Patocka <mpatocka@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>, Hillf Danton <dhillf@...il.com>
Subject: [patch] mmap: feed back correct prev vma when finding vma

After walking rb tree, if vma is determined, prev vma has to be determined
based on vma; and rb_prev should be considered only if no vma determined.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/mm/mmap.c	Fri Aug  3 07:38:10 2012
+++ b/mm/mmap.c	Mon Aug  6 20:10:18 2012
@@ -385,9 +385,13 @@ find_vma_prepare(struct mm_struct *mm, u
 		}
 	}

-	*pprev = NULL;
-	if (rb_prev)
-		*pprev = rb_entry(rb_prev, struct vm_area_struct, vm_rb);
+	if (vma) {
+		*pprev = vma->vm_prev;
+	} else {
+		*pprev = NULL;
+		if (rb_prev)
+			*pprev = rb_entry(rb_prev, struct vm_area_struct, vm_rb);
+	}
 	*rb_link = __rb_link;
 	*rb_parent = __rb_parent;
 	return vma;
--
--
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/