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authorPavel Emelyanov <xemul@openvz.org>2008-05-06 18:46:36 +0400
committerJohn W. Linville <linville@tuxdriver.com>2008-05-12 21:22:18 -0400
commitf84e71a94cb5f88d86ab50c251e09379925b80b9 (patch)
treed515d29799a47ac689df7ebfcc2cbe30297879ea /net/mac80211/mesh_pathtbl.c
parent812714d741750038004da505074c9158e9dee270 (diff)
downloadop-kernel-dev-f84e71a94cb5f88d86ab50c251e09379925b80b9.zip
op-kernel-dev-f84e71a94cb5f88d86ab50c251e09379925b80b9.tar.gz
Fix GFP_KERNEL allocation under read lock.
The mesh_path_add() read-locks the pathtbl_resize_lock and calls kmalloc with GFP_KERNEL mask. Fix it and move the endadd2 label lower. It should be _before_ the if() beyond, but it makes no sense for it being there, so I move it right after this if(). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/mesh_pathtbl.c')
-rw-r--r--net/mac80211/mesh_pathtbl.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 5845dc2..727aa52 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -158,14 +158,14 @@ int mesh_path_add(u8 *dst, struct net_device *dev)
if (atomic_add_unless(&sdata->u.sta.mpaths, 1, MESH_MAX_MPATHS) == 0)
return -ENOSPC;
- read_lock(&pathtbl_resize_lock);
-
new_mpath = kzalloc(sizeof(struct mesh_path), GFP_KERNEL);
if (!new_mpath) {
atomic_dec(&sdata->u.sta.mpaths);
err = -ENOMEM;
goto endadd2;
}
+
+ read_lock(&pathtbl_resize_lock);
memcpy(new_mpath->dst, dst, ETH_ALEN);
new_mpath->dev = dev;
new_mpath->flags = 0;
@@ -202,7 +202,6 @@ int mesh_path_add(u8 *dst, struct net_device *dev)
endadd:
spin_unlock(&mesh_paths->hashwlock[hash_idx]);
-endadd2:
read_unlock(&pathtbl_resize_lock);
if (!err && grow) {
struct mesh_table *oldtbl, *newtbl;
@@ -219,6 +218,7 @@ endadd2:
mesh_table_free(oldtbl, false);
write_unlock(&pathtbl_resize_lock);
}
+endadd2:
return err;
}
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