Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 - Fix the build with certain Kconfig combinations for the Chelsio
   inline TLS device, from Rohit Maheshwar and Vinay Kumar Yadavi.

 - Fix leak in genetlink, from Cong Lang.

 - Fix out of bounds packet header accesses in seg6, from Ahmed
   Abdelsalam.

 - Two XDP fixes in the ENA driver, from Sameeh Jubran

 - Use rwsem in device rename instead of a seqcount because this code
   can sleep, from Ahmed S. Darwish.

 - Fix WoL regressions in r8169, from Heiner Kallweit.

 - Fix qed crashes in kdump mode, from Alok Prasad.

 - Fix the callbacks used for certain thermal zones in mlxsw, from Vadim
   Pasternak.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (35 commits)
  net: dsa: lantiq_gswip: fix and improve the unsupported interface error
  mlxsw: core: Use different get_trend() callbacks for different thermal zones
  net: dp83869: Reset return variable if PHY strap is read
  rhashtable: Drop raw RCU deref in nested_table_free
  cxgb4: Use kfree() instead kvfree() where appropriate
  net: qed: fixes crash while running driver in kdump kernel
  vsock/vmci: make vmci_vsock_transport_cb() static
  net: ethtool: Fix comment mentioning typo in IS_ENABLED()
  net: phy: mscc: fix Serdes configuration in vsc8584_config_init
  net: mscc: Fix OF_MDIO config check
  net: marvell: Fix OF_MDIO config check
  net: dp83867: Fix OF_MDIO config check
  net: dp83869: Fix OF_MDIO config check
  net: ethernet: mvneta: fix MVNETA_SKB_HEADROOM alignment
  ethtool: linkinfo: remove an unnecessary NULL check
  net/xdp: use shift instead of 64 bit division
  crypto/chtls:Fix compile error when CONFIG_IPV6 is disabled
  inet_connection_sock: clear inet_num out of destroy helper
  yam: fix possible memory leak in yam_init_driver
  lan743x: Use correct MAC_CR configuration for 1 GBit speed
  ...

1 files changed, 13 insertions, 4 deletions

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index bdb7e4cadf05..9f6890aedd1a 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -63,13 +63,22 @@ EXPORT_SYMBOL_GPL(lockdep_rht_bucket_is_held);
 #define ASSERT_RHT_MUTEX(HT)
 #endif
 
+static inline union nested_table *nested_table_top(
+	const struct bucket_table *tbl)
+{
+	/* The top-level bucket entry does not need RCU protection
+	 * because it's set at the same time as tbl->nest.
+	 */
+	return (void *)rcu_dereference_protected(tbl->buckets[0], 1);
+}
+
 static void nested_table_free(union nested_table *ntbl, unsigned int size)
 {
 	const unsigned int shift = PAGE_SHIFT - ilog2(sizeof(void *));
 	const unsigned int len = 1 << shift;
 	unsigned int i;
 
-	ntbl = rcu_dereference_raw(ntbl->table);
+	ntbl = rcu_dereference_protected(ntbl->table, 1);
 	if (!ntbl)
 		return;
 
@@ -89,7 +98,7 @@ static void nested_bucket_table_free(const struct bucket_table *tbl)
 	union nested_table *ntbl;
 	unsigned int i;
 
-	ntbl = (union nested_table *)rcu_dereference_raw(tbl->buckets[0]);
+	ntbl = nested_table_top(tbl);
 
 	for (i = 0; i < len; i++)
 		nested_table_free(ntbl + i, size);
@@ -1173,7 +1182,7 @@ struct rhash_lock_head **__rht_bucket_nested(const struct bucket_table *tbl,
 	unsigned int subhash = hash;
 	union nested_table *ntbl;
 
-	ntbl = (union nested_table *)rcu_dereference_raw(tbl->buckets[0]);
+	ntbl = nested_table_top(tbl);
 	ntbl = rht_dereference_bucket_rcu(ntbl[index].table, tbl, hash);
 	subhash >>= tbl->nest;
 
@@ -1213,7 +1222,7 @@ struct rhash_lock_head **rht_bucket_nested_insert(struct rhashtable *ht,
 	unsigned int size = tbl->size >> tbl->nest;
 	union nested_table *ntbl;
 
-	ntbl = (union nested_table *)rcu_dereference_raw(tbl->buckets[0]);
+	ntbl = nested_table_top(tbl);
 	hash >>= tbl->nest;
 	ntbl = nested_table_alloc(ht, &ntbl[index].table,
 				  size <= (1 << shift));