lkml.org 
[lkml]   [2023]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 4.14 2/9] ca8210: fix mac_len negative array access
Date
From: Alexander Aring <aahringo@redhat.com>

[ Upstream commit 6c993779ea1d0cccdb3a5d7d45446dd229e610a3 ]

This patch fixes a buffer overflow access of skb->data if
ieee802154_hdr_peek_addrs() fails.

Reported-by: lianhui tang <bluetlh@gmail.com>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20230217042504.3303396-1-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ieee802154/ca8210.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
index eff7571dbea20..76ca8c63bc379 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -1955,6 +1955,8 @@ static int ca8210_skb_tx(
* packet
*/
mac_len = ieee802154_hdr_peek_addrs(skb, &header);
+ if (mac_len < 0)
+ return mac_len;

secspec.security_level = header.sec.level;
secspec.key_id_mode = header.sec.key_id_mode;
--
2.39.2
\
 
 \ /
  Last update: 2023-03-27 01:07    [W:0.069 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site