This is a note to let you know that I've just added the patch titled ppp: Destroy the mutex when cleanup to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ppp-destroy-the-mutex-when-cleanup.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Mon Dec 18 15:03:25 CET 2017 From: Gao Feng <gfree.wind@xxxxxxxxxxx> Date: Tue, 31 Oct 2017 18:25:37 +0800 Subject: ppp: Destroy the mutex when cleanup From: Gao Feng <gfree.wind@xxxxxxxxxxx> [ Upstream commit f02b2320b27c16b644691267ee3b5c110846f49e ] The mutex_destroy only makes sense when enable DEBUG_MUTEX. For the good readbility, it's better to invoke it in exit func when the init func invokes mutex_init. Signed-off-by: Gao Feng <gfree.wind@xxxxxxxxxxx> Acked-by: Guillaume Nault <g.nault@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ppp/ppp_generic.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/ppp/ppp_generic.c +++ b/drivers/net/ppp/ppp_generic.c @@ -916,6 +916,7 @@ static __net_exit void ppp_exit_net(stru { struct ppp_net *pn = net_generic(net, ppp_net_id); + mutex_destroy(&pn->all_ppp_mutex); idr_destroy(&pn->units_idr); } Patches currently in stable-queue which might be from gfree.wind@xxxxxxxxxxx are queue-3.18/ppp-destroy-the-mutex-when-cleanup.patch