netdev - [PATCH] net: core: dev: Initialise napi state correctly

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]

Message-Id: <20190118124632.17183-1-mckay.david@gmail.com>
Date:   Fri, 18 Jan 2019 12:46:32 +0000
From:   Dave McKay <mckay.david@...il.com>
To:     netdev@...r.kernel.org
Subject: [PATCH] net: core: dev: Initialise napi state correctly

The state member of the napi_struct is not initialised correctly, it
sets the SCHED bit without initialising the state to zero first. This
results in peculiar behaviour if the original napi_struct didn't come
from a zero initialised region to start with.

This patch just sets it directly using the appropriate bitfield
constant.

Signed-off-by: Dave McKay <mckay.david@...il.com>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 82f20022259d..250f97bf1973 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6276,7 +6276,7 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
 #ifdef CONFIG_NETPOLL
 	napi->poll_owner = -1;
 #endif
-	set_bit(NAPI_STATE_SCHED, &napi->state);
+	napi->state = NAPIF_STATE_SCHED;
 	napi_hash_add(napi);
 }
 EXPORT_SYMBOL(netif_napi_add);
-- 
2.20.1