From 8566dc3fca470454461b161677a5ae3bb3a8c1b8 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Wed, 7 May 2008 19:51:51 +0400 Subject: [PATCH] mac80211: Fix sleeping allocation under lock in mesh_path_node_copy. The mesh_path_node_copy() can be called like this: mesh_path_add `- write_lock(&pathtbl_resize_lock); /* ! */ `- mesh_table_grow `- ->copy_node `- mesh_path_node_copy thus, the GFP_KERNEL is not suitable here. The acceptable fix, I suppose, is make this allocation GPF_ATOMIC - the mpath_node being allocated is 4 pointers, i.e. this allocation is small enough to survive even under a moderate memory pressure. Signed-off-by: Pavel Emelyanov Signed-off-by: John W. Linville --- net/mac80211/mesh_pathtbl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index fe1ceeea07f1..1154398eceaa 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -469,7 +469,7 @@ static int mesh_path_node_copy(struct hlist_node *p, struct mesh_table *newtbl) struct mpath_node *node, *new_node; u32 hash_idx; - new_node = kmalloc(sizeof(struct mpath_node), GFP_KERNEL); + new_node = kmalloc(sizeof(struct mpath_node), GFP_ATOMIC); if (new_node == NULL) return -ENOMEM; -- 2.20.1