From: Pavel Andrianov <andrianov@ispras.ru>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: libertas-dev@lists.infradead.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
vaishali.thakkar@oracle.com, LDV list <ldv-project@ispras.ru>
Subject: [ldv-project] [net] libertas: potential race condition
Date: Tue, 07 Jun 2016 13:30:12 +0400 [thread overview]
Message-ID: <57569424.9040906@ispras.ru> (raw)
Hi!
There is a potential race condition in
drivers/net/wireless/libertas/libertas.ko.
In the function lbs_hard_start_xmit(..), line 159, a socket buffer is
written to priv->current_skb with a spin_lock protection.
In the function lbs_mac_event_disconnected(..), lines 50-51, the field
current_skb is cleaned. There is no protection used. The corresponding
handlers are activated at the same time in lbs_start_card(..) and then
may be executed simultaneously. Note, there are two structures
lbs_netdev_ops and mesh_netdev_ops, which have the target handler
lbs_hard_start_xmit.
Is it a real race or I have missed something?
--
Pavel Andrianov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org
e-mail: andrianov@ispras.ru
next reply other threads:[~2016-06-07 10:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 9:30 Pavel Andrianov [this message]
2016-06-07 14:39 ` [ldv-project] [net] libertas: potential race condition Dan Williams
2016-06-07 14:54 ` Pavel Andrianov
2016-06-07 22:51 ` James Cameron
2016-06-14 13:16 ` Pavel Andrianov
2016-06-15 0:46 ` James Cameron
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