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  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:	Tue, 20 Mar 2007 12:22:33 -0700
From:	Deepak Saxena <>
Cc:, Andrew Morton <>,
	Ingo Molnar <>, Daniel Walker <>
Subject: [PATCH -rt] Fix initialization of spinlock in irttp_dup()

This was found around the 2.6.10 timeframe when testing with the -rt patch
and I believe is still is an issue. irttp_dup() does a memcpy() of the tsap_cb 
structure causing the spinlock protecting various fields in the structure to be 
duped.  This works OK in the non-RT case but in the RT case we end up with two 
mutexes pointing to the same wait_list and leading to an OOPS. Fix is to simply
initialize the spinlock after the memcpy().

Signed-off-by: Deepak Saxena <>

diff --git a/net/irda/irttp.c b/net/irda/irttp.c
index a7486b3..df2b2f7 100644
--- a/net/irda/irttp.c
+++ b/net/irda/irttp.c
@@ -1441,6 +1441,7 @@ struct tsap_cb *irttp_dup(struct tsap_cb
 	/* Dup */
 	memcpy(new, orig, sizeof(struct tsap_cb));
+	spin_lock_init(&new->lock);
 	/* We don't need the old instance any more */
 	spin_unlock_irqrestore(&irttp->tsaps->hb_spinlock, flags);

Deepak Saxena - -

In the end, they will not say, "those were dark times,"  they will ask
"why were their poets silent?" - Bertolt Brecht
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists