From: Patrick McHardy <kaber@trash.net>
Date: Wed, 7 Sep 2005 02:47:50 +0000 (-0700)
Subject: [NET]: proto_unregister: fix sleeping while atomic
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0a3f4358ac6283fe3a565183eaf9716de28b6fd0;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

[NET]: proto_unregister: fix sleeping while atomic

proto_unregister holds a lock while calling kmem_cache_destroy, which
can sleep.

Noticed by Daniele Orlandi <daniele@orlandi.com>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/sock.c b/net/core/sock.c
index b32b1815ae5a..ac63b56e23b2 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1529,6 +1529,8 @@ EXPORT_SYMBOL(proto_register);
 void proto_unregister(struct proto *prot)
 {
 	write_lock(&proto_list_lock);
+	list_del(&prot->node);
+	write_unlock(&proto_list_lock);
 
 	if (prot->slab != NULL) {
 		kmem_cache_destroy(prot->slab);
@@ -1550,9 +1552,6 @@ void proto_unregister(struct proto *prot)
 		kfree(name);
 		prot->twsk_slab = NULL;
 	}
-
-	list_del(&prot->node);
-	write_unlock(&proto_list_lock);
 }
 
 EXPORT_SYMBOL(proto_unregister);