From d300a41ef1c39cc5e6b90fd8834ea7ab16b5c48f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 13 May 2010 12:51:03 -0400 Subject: SUNRPC: Dont run rpcauth_cache_shrinker() when gfp_mask is GFP_NOFS Under some circumstances, put_rpccred() can end up allocating memory, so check the gfp_mask to prevent deadlocks. Signed-off-by: Trond Myklebust --- net/sunrpc/auth.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 95afe79dd9d..0667a36aee7 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -270,6 +270,8 @@ rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) LIST_HEAD(free); int res; + if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL) + return (nr_to_scan == 0) ? 0 : -1; if (list_empty(&cred_unused)) return 0; spin_lock(&rpc_credcache_lock); -- cgit v1.2.3-18-g5258