Commit e844a7b9 authored Aug 06, 2010 by J. Bruce Fields

nfsd: initialize nfsd versions before creating svc



Commit 59db4a0c "nfsd: move more into
nfsd_startup()" inadvertently moved nfsd_versions after
nfsd_create_svc().  On older distributions using an rpc.nfsd that does
not explicitly set the list of nfsd versions, this results in
svc-create_pooled() being called with an empty versions array.  The
resulting incomplete initialization leads to a NULL dereference in
svc_process_common() the first time a client accesses the server.

Move nfsd_reset_versions() back before the svc_create_pooled(); this
time, put it closer to the svc_create_pooled() call, to make this
mistake more difficult in the future.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

parent e2aa7f83

fs/nfsd/nfssvc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -224,7 +224,6 @@ static int nfsd_startup(unsigned short port, int nrservs)
		ret = nfs4_state_start();
		if (ret)
		goto out_lockd;
		nfsd_reset_versions();
		nfsd_up = true;
		return 0;
		out_lockd:
		@@ -329,6 +328,7 @@ int nfsd_create_serv(void)
		nfsd_max_blksize >= 810242)
		nfsd_max_blksize /= 2;
		}
		nfsd_reset_versions();

		nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
		nfsd_last_thread, nfsd, THIS_MODULE);