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: Thu, 15 Feb 2024 10:27:32 -0800
From: Justin Chen <justin.chen@...adcom.com>
To: netdev@...r.kernel.org
Cc: Justin Chen <justin.chen@...adcom.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Hangyu Hua <hbh25y@...il.com>,
	bcm-kernel-feedback-list@...adcom.com (open list:BROADCOM ASP 2.0 ETHERNET DRIVER),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] net: bcmasp: Sanity check is off by one

A sanity check for OOB write is off by one leading to a false positive
when the array is full.

Fixes: 9b90aca97f6d ("net: ethernet: bcmasp: fix possible OOB write in bcmasp_netfilt_get_all_active()")
Signed-off-by: Justin Chen <justin.chen@...adcom.com>
---
 drivers/net/ethernet/broadcom/asp2/bcmasp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
index 29b04a274d07..80245c65cc90 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
@@ -535,9 +535,6 @@ int bcmasp_netfilt_get_all_active(struct bcmasp_intf *intf, u32 *rule_locs,
 	int j = 0, i;
 
 	for (i = 0; i < NUM_NET_FILTERS; i++) {
-		if (j == *rule_cnt)
-			return -EMSGSIZE;
-
 		if (!priv->net_filters[i].claimed ||
 		    priv->net_filters[i].port != intf->port)
 			continue;
@@ -547,6 +544,9 @@ int bcmasp_netfilt_get_all_active(struct bcmasp_intf *intf, u32 *rule_locs,
 		    priv->net_filters[i - 1].wake_filter)
 			continue;
 
+		if (j == *rule_cnt)
+			return -EMSGSIZE;
+
 		rule_locs[j++] = priv->net_filters[i].fs.location;
 	}
 
-- 
2.34.1


Download attachment "smime.p7s" of type "application/pkcs7-signature" (4206 bytes)

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ