NeilBrown 4a9be28c45 NFS: fix mount/umount race in nlmclnt. ... If the last NFSv3 unmount from a given host races with a mount from the same host, we can destroy an nlm_host that is still in use. Specifically nlmclnt_lookup_host() can increment h_count on an nlm_host that nlmclnt_release_host() has just successfully called refcount_dec_and_test() on. Once nlmclnt_lookup_host() drops the mutex, nlm_destroy_host_lock() will be called to destroy the nlmclnt which is now in use again. The cause of the problem is that the dec_and_test happens outside the locked region. This is easily fixed by using refcount_dec_and_mutex_lock(). Fixes: 8ea6ecc8b0 ("lockd: Create client-side nlm_host cache") Cc: stable@vger.kernel.org (v2.6.38+) Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>		2019-03-18 22:39:34 -04:00
..
clnt4xdr.c
clntlock.c
clntproc.c
clntxdr.c
host.c	NFS: fix mount/umount race in nlmclnt.	2019-03-18 22:39:34 -04:00
Makefile
mon.c
netns.h
procfs.c
procfs.h
svc4proc.c
svc.c
svclock.c
svcproc.c
svcshare.c
svcsubs.c
xdr4.c
xdr.c