lkml.org 
[lkml]   [2019]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.19 13/99] netfilter: nf_conncount: fix argument order to find_next_bit
Date
4.19-stable review patch.  If anyone has any objections, please let me know.

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

From: Florian Westphal <fw@strlen.de>

commit a007232066f6839d6f256bab21e825d968f1a163 upstream.

Size and 'next bit' were swapped, this bug could cause worker to
reschedule itself even if system was idle.

Fixes: 5c789e131cbb9 ("netfilter: nf_conncount: Add list lock and gc worker, and RCU for init tree search")
Reviewed-by: Shawn Bohrer <sbohrer@cloudflare.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/netfilter/nf_conncount.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/nf_conncount.c
+++ b/net/netfilter/nf_conncount.c
@@ -488,7 +488,7 @@ next:
clear_bit(tree, data->pending_trees);

next_tree = (tree + 1) % CONNCOUNT_SLOTS;
- next_tree = find_next_bit(data->pending_trees, next_tree, CONNCOUNT_SLOTS);
+ next_tree = find_next_bit(data->pending_trees, CONNCOUNT_SLOTS, next_tree);

if (next_tree < CONNCOUNT_SLOTS) {
data->gc_tree = next_tree;

\
 
 \ /
  Last update: 2019-01-21 15:08    [W:0.407 / U:8.892 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site