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-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 26 Nov 2007 17:52:15 +0100
From:	Patrick McHardy <>
To:	Herbert Xu <>
CC:	"David S. Miller" <>,
	Linux Netdev List <>
Subject: Re: [XFRM]: Fix leak of expired xfrm_states

Herbert Xu wrote:
> On Mon, Nov 26, 2007 at 04:56:01PM +0100, Patrick McHardy wrote:
>> That should work as long as we keep the del_timer_sync to avoid
>> a use-after-free. It seems a bit fragile though.
> Well we're relying on the del_timer_sync already to avoid the
> ref count on the timer.  Otherwise if the admin deletes the
> SA while the timer is running it'll go up in smoke too.
> If you look in the history you'll find that the same patch
> that removed the ref count on the timer introduced the call
> to del_timer_sync :)

OK, here's a patch to use xfrm_state_put in __xfrm_state_delete().
I've checked the other callers and it should be fine. lock ordering
between x->lock and xfrm_state_gc_lock also doesn't seem to be an

View attachment "x" of type "text/plain" (976 bytes)

Powered by blists - more mailing lists