lkml.org 
[lkml]   [2023]   [Apr]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ieee802154: hwsim: Fix possible memory leaks
Date
After replacing e->info, it is necessary to free the old einfo.

Signed-off-by: Chen Aotian <chenaotian2@163.com>
---
drivers/net/ieee802154/mac802154_hwsim.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
index 8445c2189..6e7e10b17 100644
--- a/drivers/net/ieee802154/mac802154_hwsim.c
+++ b/drivers/net/ieee802154/mac802154_hwsim.c
@@ -685,7 +685,7 @@ static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info)
static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info)
{
struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
- struct hwsim_edge_info *einfo;
+ struct hwsim_edge_info *einfo, *einfo_old;
struct hwsim_phy *phy_v0;
struct hwsim_edge *e;
u32 v0, v1;
@@ -723,8 +723,10 @@ static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info)
list_for_each_entry_rcu(e, &phy_v0->edges, list) {
if (e->endpoint->idx == v1) {
einfo->lqi = lqi;
+ einfo_old = rcu_dereference(e->info);
rcu_assign_pointer(e->info, einfo);
rcu_read_unlock();
+ kfree_rcu(einfo_old, rcu);
mutex_unlock(&hwsim_phys_lock);
return 0;
}
--
2.25.1
\
 
 \ /
  Last update: 2023-04-07 03:28    [W:0.060 / U:0.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site