linux-kernel - [ 35/47] pktgen: fix module unload for good

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:	Thu, 07 Jun 2012 13:14:33 +0900
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 35/47] pktgen: fix module unload for good

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Eric Dumazet <edumazet@...gle.com>

[ Upstream commit d4b1133558e0d417342d5d2c49e4c35b428ff20d ]

commit c57b5468406 (pktgen: fix crash at module unload) did a very poor
job with list primitives.

1) list_splice() arguments were in the wrong order

2) list_splice(list, head) has undefined behavior if head is not
initialized.

3) We should use the list_splice_init() variant to clear pktgen_threads
list.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/core/pktgen.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3755,13 +3755,13 @@ static void __exit pg_cleanup(void)
 {
 	struct pktgen_thread *t;
 	struct list_head *q, *n;
-	struct list_head list;
+	LIST_HEAD(list);
 
 	/* Stop all interfaces & threads */
 	pktgen_exiting = true;
 
 	mutex_lock(&pktgen_thread_lock);
-	list_splice(&list, &pktgen_threads);
+	list_splice_init(&pktgen_threads, &list);
 	mutex_unlock(&pktgen_thread_lock);
 
 	list_for_each_safe(q, n, &list) {


--
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/