linux-kernel - [PATCH] early_res: fix check in free_early

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]

Date:	Fri, 4 Jun 2010 23:10:25 +0200
From:	Adam Lackorzynski <adam@...inf.tu-dresden.de>
To:	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH] early_res: fix check in free_early_partial

free_early_partial must check the returned region of find_overlapped_early()
whether it is a region at all. Otherwise the function will indefinitely
loop.

Signed-off-by: Adam Lackorzynski <adam@...inf.tu-dresden.de>
---
 kernel/early_res.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/early_res.c b/kernel/early_res.c
index 31aa933..9afcb4c 100644
--- a/kernel/early_res.c
+++ b/kernel/early_res.c
@@ -341,10 +341,11 @@ void __init free_early_partial(u64 start, u64 end)
 
 try_next:
 	i = find_overlapped_early(start, end);
-	if (i >= max_early_res)
+	r = &early_res[i];
+
+	if (i >= max_early_res || !r->end)
 		return;
 
-	r = &early_res[i];
 	/* hole ? */
 	if (r->end >= end && r->start <= start) {
 		drop_range_partial(i, start, end);
-- 
1.7.1
--
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/