[gentoo-commits] proj/linux-patches:4.4 commit in: /

[Mike Pagano]

commit:     29eec363a56cc46e3f5f2891fdacf07cd66d115d
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Sat Feb 23 14:40:32 2019 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Sat Feb 23 14:40:32 2019 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=29eec363

proj/linux-patches: Linux patch 4.4.176

Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org>

 0000_README              |   4 +
 1175_linux-4.4.176.patch | 597 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 601 insertions(+)

diff --git a/0000_README b/0000_README
index ac4792e..f0602c1 100644
--- a/0000_README
+++ b/0000_README
@@ -743,6 +743,10 @@ Patch:  1174_linux-4.4.175.patch
 From:   http://www.kernel.org
 Desc:   Linux 4.4.175
 
+Patch:  1175_linux-4.4.176.patch
+From:   http://www.kernel.org
+Desc:   Linux 4.4.176
+
 Patch:  1500_XATTR_USER_PREFIX.patch
 From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
 Desc:   Support for namespace user.pax.* on tmpfs.

diff --git a/1175_linux-4.4.176.patch b/1175_linux-4.4.176.patch
new file mode 100644
index 0000000..1bac36a
--- /dev/null
+++ b/1175_linux-4.4.176.patch
@@ -0,0 +1,597 @@
+diff --git a/Makefile b/Makefile
+index 5f0bdef2af99..d7a3b832e0fd 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 4
+ PATCHLEVEL = 4
+-SUBLEVEL = 175
++SUBLEVEL = 176
+ EXTRAVERSION =
+ NAME = Blurry Fish Butt
+ 
+diff --git a/arch/x86/kernel/livepatch.c b/arch/x86/kernel/livepatch.c
+index d1d35ccffed3..579f8f813ce0 100644
+--- a/arch/x86/kernel/livepatch.c
++++ b/arch/x86/kernel/livepatch.c
+@@ -58,6 +58,7 @@ int klp_write_module_reloc(struct module *mod, unsigned long type,
+ 		val = (s32)value;
+ 		break;
+ 	case R_X86_64_PC32:
++	case R_X86_64_PLT32:
+ 		val = (u32)(value - loc);
+ 		break;
+ 	default:
+diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
+index aee2886a387c..14553f6c03a6 100644
+--- a/arch/x86/kvm/vmx.c
++++ b/arch/x86/kvm/vmx.c
+@@ -4628,7 +4628,9 @@ static u8 vmx_msr_bitmap_mode(struct kvm_vcpu *vcpu)
+ {
+ 	u8 mode = 0;
+ 
+-	if (irqchip_in_kernel(vcpu->kvm) && apic_x2apic_mode(vcpu->arch.apic)) {
++	if (cpu_has_secondary_exec_ctrls() &&
++	    (vmcs_read32(SECONDARY_VM_EXEC_CONTROL) &
++	     SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE)) {
+ 		mode |= MSR_BITMAP_MODE_X2APIC;
+ 		if (enable_apicv)
+ 			mode |= MSR_BITMAP_MODE_X2APIC_APICV;
+diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
+index cb6606a0470d..be60bd5bab78 100644
+--- a/drivers/hwmon/lm80.c
++++ b/drivers/hwmon/lm80.c
+@@ -393,8 +393,10 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
+ 	}
+ 
+ 	rv = lm80_read_value(client, LM80_REG_FANDIV);
+-	if (rv < 0)
++	if (rv < 0) {
++		mutex_unlock(&data->update_lock);
+ 		return rv;
++	}
+ 	reg = (rv & ~(3 << (2 * (nr + 1))))
+ 	    | (data->fan_div[nr] << (2 * (nr + 1)));
+ 	lm80_write_value(client, LM80_REG_FANDIV, reg);
+diff --git a/drivers/isdn/mISDN/timerdev.c b/drivers/isdn/mISDN/timerdev.c
+index 9438d7ec3308..8b29e97cf668 100644
+--- a/drivers/isdn/mISDN/timerdev.c
++++ b/drivers/isdn/mISDN/timerdev.c
+@@ -168,8 +168,8 @@ dev_expire_timer(unsigned long data)
+ 	spin_lock_irqsave(&timer->dev->lock, flags);
+ 	if (timer->id >= 0)
+ 		list_move_tail(&timer->list, &timer->dev->expired);
+-	spin_unlock_irqrestore(&timer->dev->lock, flags);
+ 	wake_up_interruptible(&timer->dev->wait);
++	spin_unlock_irqrestore(&timer->dev->lock, flags);
+ }
+ 
+ static int
+diff --git a/drivers/mfd/as3722.c b/drivers/mfd/as3722.c
+index 924ea90494ae..e1f597f97f86 100644
+--- a/drivers/mfd/as3722.c
++++ b/drivers/mfd/as3722.c
+@@ -405,6 +405,8 @@ static int as3722_i2c_probe(struct i2c_client *i2c,
+ 		goto scrub;
+ 	}
+ 
++	device_init_wakeup(as3722->dev, true);
++
+ 	dev_dbg(as3722->dev, "AS3722 core driver initialized successfully\n");
+ 	return 0;
+ 
+@@ -422,6 +424,29 @@ static int as3722_i2c_remove(struct i2c_client *i2c)
+ 	return 0;
+ }
+ 
++static int __maybe_unused as3722_i2c_suspend(struct device *dev)
++{
++	struct as3722 *as3722 = dev_get_drvdata(dev);
++
++	if (device_may_wakeup(dev))
++		enable_irq_wake(as3722->chip_irq);
++	disable_irq(as3722->chip_irq);
++
++	return 0;
++}
++
++static int __maybe_unused as3722_i2c_resume(struct device *dev)
++{
++	struct as3722 *as3722 = dev_get_drvdata(dev);
++
++	enable_irq(as3722->chip_irq);
++
++	if (device_may_wakeup(dev))
++		disable_irq_wake(as3722->chip_irq);
++
++	return 0;
++}
++
+ static const struct of_device_id as3722_of_match[] = {
+ 	{ .compatible = "ams,as3722", },
+ 	{},
+@@ -434,10 +459,15 @@ static const struct i2c_device_id as3722_i2c_id[] = {
+ };
+ MODULE_DEVICE_TABLE(i2c, as3722_i2c_id);
+ 
++static const struct dev_pm_ops as3722_pm_ops = {
++	SET_SYSTEM_SLEEP_PM_OPS(as3722_i2c_suspend, as3722_i2c_resume)
++};
++
+ static struct i2c_driver as3722_i2c_driver = {
+ 	.driver = {
+ 		.name = "as3722",
+ 		.of_match_table = as3722_of_match,
++		.pm = &as3722_pm_ops,
+ 	},
+ 	.probe = as3722_i2c_probe,
+ 	.remove = as3722_i2c_remove,
+diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
+index 6e5065f0907b..4b97aa24559a 100644
+--- a/drivers/net/ethernet/marvell/sky2.c
++++ b/drivers/net/ethernet/marvell/sky2.c
+@@ -5079,7 +5079,7 @@ static int sky2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+ 	INIT_WORK(&hw->restart_work, sky2_restart);
+ 
+ 	pci_set_drvdata(pdev, hw);
+-	pdev->d3_delay = 200;
++	pdev->d3_delay = 300;
+ 
+ 	return 0;
+ 
+diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+index 2e51b816a7e8..fbf701e5f1e9 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+@@ -614,25 +614,27 @@ static int stmmac_ethtool_op_set_eee(struct net_device *dev,
+ 				     struct ethtool_eee *edata)
+ {
+ 	struct stmmac_priv *priv = netdev_priv(dev);
++	int ret;
+ 
+-	priv->eee_enabled = edata->eee_enabled;
+-
+-	if (!priv->eee_enabled)
++	if (!edata->eee_enabled) {
+ 		stmmac_disable_eee_mode(priv);
+-	else {
++	} else {
+ 		/* We are asking for enabling the EEE but it is safe
+ 		 * to verify all by invoking the eee_init function.
+ 		 * In case of failure it will return an error.
+ 		 */
+-		priv->eee_enabled = stmmac_eee_init(priv);
+-		if (!priv->eee_enabled)
++		edata->eee_enabled = stmmac_eee_init(priv);
++		if (!edata->eee_enabled)
+ 			return -EOPNOTSUPP;
+-
+-		/* Do not change tx_lpi_timer in case of failure */
+-		priv->tx_lpi_timer = edata->tx_lpi_timer;
+ 	}
+ 
+-	return phy_ethtool_set_eee(priv->phydev, edata);
++	ret = phy_ethtool_set_eee(dev->phydev, edata);
++	if (ret)
++		return ret;
++
++	priv->eee_enabled = edata->eee_enabled;
++	priv->tx_lpi_timer = edata->tx_lpi_timer;
++	return 0;
+ }
+ 
+ static u32 stmmac_usec2riwt(u32 usec, struct stmmac_priv *priv)
+diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
+index c41378214ede..553908adf3c5 100644
+--- a/drivers/net/vxlan.c
++++ b/drivers/net/vxlan.c
+@@ -1881,7 +1881,7 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
+ 	struct pcpu_sw_netstats *tx_stats, *rx_stats;
+ 	union vxlan_addr loopback;
+ 	union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
+-	struct net_device *dev = skb->dev;
++	struct net_device *dev;
+ 	int len = skb->len;
+ 
+ 	tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
+@@ -1901,8 +1901,15 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
+ #endif
+ 	}
+ 
++	rcu_read_lock();
++	dev = skb->dev;
++	if (unlikely(!(dev->flags & IFF_UP))) {
++		kfree_skb(skb);
++		goto drop;
++	}
++
+ 	if (dst_vxlan->flags & VXLAN_F_LEARN)
+-		vxlan_snoop(skb->dev, &loopback, eth_hdr(skb)->h_source);
++		vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source);
+ 
+ 	u64_stats_update_begin(&tx_stats->syncp);
+ 	tx_stats->tx_packets++;
+@@ -1915,8 +1922,10 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
+ 		rx_stats->rx_bytes += len;
+ 		u64_stats_update_end(&rx_stats->syncp);
+ 	} else {
++drop:
+ 		dev->stats.rx_dropped++;
+ 	}
++	rcu_read_unlock();
+ }
+ 
+ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
+diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
+index f0d87347df19..0508fcc67480 100644
+--- a/include/linux/netdev_features.h
++++ b/include/linux/netdev_features.h
+@@ -11,6 +11,8 @@
+ #define _LINUX_NETDEV_FEATURES_H
+ 
+ #include <linux/types.h>
++#include <linux/bitops.h>
++#include <asm/byteorder.h>
+ 
+ typedef u64 netdev_features_t;
+ 
+@@ -125,8 +127,26 @@ enum {
+ #define NETIF_F_HW_L2FW_DOFFLOAD	__NETIF_F(HW_L2FW_DOFFLOAD)
+ #define NETIF_F_BUSY_POLL	__NETIF_F(BUSY_POLL)
+ 
+-#define for_each_netdev_feature(mask_addr, bit)	\
+-	for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
++/* Finds the next feature with the highest number of the range of start till 0.
++ */
++static inline int find_next_netdev_feature(u64 feature, unsigned long start)
++{
++	/* like BITMAP_LAST_WORD_MASK() for u64
++	 * this sets the most significant 64 - start to 0.
++	 */
++	feature &= ~0ULL >> (-start & ((sizeof(feature) * 8) - 1));
++
++	return fls64(feature) - 1;
++}
++
++/* This goes for the MSB to the LSB through the set feature bits,
++ * mask_addr should be a u64 and bit an int
++ */
++#define for_each_netdev_feature(mask_addr, bit)				\
++	for ((bit) = find_next_netdev_feature((mask_addr),		\
++					      NETDEV_FEATURE_COUNT);	\
++	     (bit) >= 0;						\
++	     (bit) = find_next_netdev_feature((mask_addr), (bit) - 1))
+ 
+ /* Features valid for ethtool to change */
+ /* = all defined minus driver/device-class-related */
+diff --git a/include/net/ax25.h b/include/net/ax25.h
+index e602f8177ebf..b507ce2b1952 100644
+--- a/include/net/ax25.h
++++ b/include/net/ax25.h
+@@ -199,6 +199,18 @@ static inline void ax25_hold_route(ax25_route *ax25_rt)
+ 
+ void __ax25_put_route(ax25_route *ax25_rt);
+ 
++extern rwlock_t ax25_route_lock;
++
++static inline void ax25_route_lock_use(void)
++{
++	read_lock(&ax25_route_lock);
++}
++
++static inline void ax25_route_lock_unuse(void)
++{
++	read_unlock(&ax25_route_lock);
++}
++
+ static inline void ax25_put_route(ax25_route *ax25_rt)
+ {
+ 	if (atomic_dec_and_test(&ax25_rt->refcount))
+diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
+index 235c7811a86a..408d76f47bd2 100644
+--- a/include/net/inetpeer.h
++++ b/include/net/inetpeer.h
+@@ -40,6 +40,7 @@ struct inet_peer {
+ 
+ 	u32			metrics[RTAX_MAX];
+ 	u32			rate_tokens;	/* rate limiting for ICMP */
++	u32			n_redirects;
+ 	unsigned long		rate_last;
+ 	union {
+ 		struct list_head	gc_list;
+diff --git a/include/net/tcp.h b/include/net/tcp.h
+index a99f75ef6a73..14ec97309581 100644
+--- a/include/net/tcp.h
++++ b/include/net/tcp.h
+@@ -1457,6 +1457,7 @@ static inline void tcp_write_queue_purge(struct sock *sk)
+ 		sk_wmem_free_skb(sk, skb);
+ 	sk_mem_reclaim(sk);
+ 	tcp_clear_all_retrans_hints(tcp_sk(sk));
++	inet_csk(sk)->icsk_backoff = 0;
+ }
+ 
+ static inline struct sk_buff *tcp_write_queue_head(const struct sock *sk)
+diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c
+index 2fa3be965101..cd9a24e5b97a 100644
+--- a/net/ax25/ax25_ip.c
++++ b/net/ax25/ax25_ip.c
+@@ -114,6 +114,7 @@ netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
+ 	dst = (ax25_address *)(bp + 1);
+ 	src = (ax25_address *)(bp + 8);
+ 
++	ax25_route_lock_use();
+ 	route = ax25_get_route(dst, NULL);
+ 	if (route) {
+ 		digipeat = route->digipeat;
+@@ -206,9 +207,8 @@ netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
+ 	ax25_queue_xmit(skb, dev);
+ 
+ put:
+-	if (route)
+-		ax25_put_route(route);
+ 
++	ax25_route_lock_unuse();
+ 	return NETDEV_TX_OK;
+ }
+ 
+diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
+index d39097737e38..149f82bd83fd 100644
+--- a/net/ax25/ax25_route.c
++++ b/net/ax25/ax25_route.c
+@@ -40,7 +40,7 @@
+ #include <linux/export.h>
+ 
+ static ax25_route *ax25_route_list;
+-static DEFINE_RWLOCK(ax25_route_lock);
++DEFINE_RWLOCK(ax25_route_lock);
+ 
+ void ax25_rt_device_down(struct net_device *dev)
+ {
+@@ -349,6 +349,7 @@ const struct file_operations ax25_route_fops = {
+  *	Find AX.25 route
+  *
+  *	Only routes with a reference count of zero can be destroyed.
++ *	Must be called with ax25_route_lock read locked.
+  */
+ ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
+ {
+@@ -356,7 +357,6 @@ ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
+ 	ax25_route *ax25_def_rt = NULL;
+ 	ax25_route *ax25_rt;
+ 
+-	read_lock(&ax25_route_lock);
+ 	/*
+ 	 *	Bind to the physical interface we heard them on, or the default
+ 	 *	route if none is found;
+@@ -379,11 +379,6 @@ ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
+ 	if (ax25_spe_rt != NULL)
+ 		ax25_rt = ax25_spe_rt;
+ 
+-	if (ax25_rt != NULL)
+-		ax25_hold_route(ax25_rt);
+-
+-	read_unlock(&ax25_route_lock);
+-
+ 	return ax25_rt;
+ }
+ 
+@@ -414,9 +409,12 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
+ 	ax25_route *ax25_rt;
+ 	int err = 0;
+ 
+-	if ((ax25_rt = ax25_get_route(addr, NULL)) == NULL)
++	ax25_route_lock_use();
++	ax25_rt = ax25_get_route(addr, NULL);
++	if (!ax25_rt) {
++		ax25_route_lock_unuse();
+ 		return -EHOSTUNREACH;
+-
++	}
+ 	if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL) {
+ 		err = -EHOSTUNREACH;
+ 		goto put;
+@@ -451,8 +449,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
+ 	}
+ 
+ put:
+-	ax25_put_route(ax25_rt);
+-
++	ax25_route_lock_unuse();
+ 	return err;
+ }
+ 
+diff --git a/net/core/dev.c b/net/core/dev.c
+index e03c1d2f6707..49f78bce5795 100644
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -6421,7 +6421,7 @@ static netdev_features_t netdev_sync_upper_features(struct net_device *lower,
+ 	netdev_features_t feature;
+ 	int feature_bit;
+ 
+-	for_each_netdev_feature(&upper_disables, feature_bit) {
++	for_each_netdev_feature(upper_disables, feature_bit) {
+ 		feature = __NETIF_F_BIT(feature_bit);
+ 		if (!(upper->wanted_features & feature)
+ 		    && (features & feature)) {
+@@ -6441,7 +6441,7 @@ static void netdev_sync_lower_features(struct net_device *upper,
+ 	netdev_features_t feature;
+ 	int feature_bit;
+ 
+-	for_each_netdev_feature(&upper_disables, feature_bit) {
++	for_each_netdev_feature(upper_disables, feature_bit) {
+ 		feature = __NETIF_F_BIT(feature_bit);
+ 		if (!(features & feature) && (lower->features & feature)) {
+ 			netdev_dbg(upper, "Disabling feature %pNF on lower dev %s.\n",
+diff --git a/net/core/skbuff.c b/net/core/skbuff.c
+index fea7c24e99d0..2f63a90065e6 100644
+--- a/net/core/skbuff.c
++++ b/net/core/skbuff.c
+@@ -374,6 +374,8 @@ static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
+  */
+ void *netdev_alloc_frag(unsigned int fragsz)
+ {
++	fragsz = SKB_DATA_ALIGN(fragsz);
++
+ 	return __netdev_alloc_frag(fragsz, GFP_ATOMIC | __GFP_COLD);
+ }
+ EXPORT_SYMBOL(netdev_alloc_frag);
+@@ -387,6 +389,8 @@ static void *__napi_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
+ 
+ void *napi_alloc_frag(unsigned int fragsz)
+ {
++	fragsz = SKB_DATA_ALIGN(fragsz);
++
+ 	return __napi_alloc_frag(fragsz, GFP_ATOMIC | __GFP_COLD);
+ }
+ EXPORT_SYMBOL(napi_alloc_frag);
+diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
+index 86fa45809540..0c5862914f05 100644
+--- a/net/ipv4/inetpeer.c
++++ b/net/ipv4/inetpeer.c
+@@ -448,6 +448,7 @@ relookup:
+ 		atomic_set(&p->rid, 0);
+ 		p->metrics[RTAX_LOCK-1] = INETPEER_METRICS_NEW;
+ 		p->rate_tokens = 0;
++		p->n_redirects = 0;
+ 		/* 60*HZ is arbitrary, but chosen enough high so that the first
+ 		 * calculation of tokens is at its maximum.
+ 		 */
+diff --git a/net/ipv4/route.c b/net/ipv4/route.c
+index 3251dede1815..80ce6b0672d2 100644
+--- a/net/ipv4/route.c
++++ b/net/ipv4/route.c
+@@ -876,13 +876,15 @@ void ip_rt_send_redirect(struct sk_buff *skb)
+ 	/* No redirected packets during ip_rt_redirect_silence;
+ 	 * reset the algorithm.
+ 	 */
+-	if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence))
++	if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence)) {
+ 		peer->rate_tokens = 0;
++		peer->n_redirects = 0;
++	}
+ 
+ 	/* Too many ignored redirects; do not send anything
+ 	 * set dst.rate_last to the last seen redirected packet.
+ 	 */
+-	if (peer->rate_tokens >= ip_rt_redirect_number) {
++	if (peer->n_redirects >= ip_rt_redirect_number) {
+ 		peer->rate_last = jiffies;
+ 		goto out_put_peer;
+ 	}
+@@ -899,6 +901,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
+ 		icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, gw);
+ 		peer->rate_last = jiffies;
+ 		++peer->rate_tokens;
++		++peer->n_redirects;
+ #ifdef CONFIG_IP_ROUTE_VERBOSE
+ 		if (log_martians &&
+ 		    peer->rate_tokens == ip_rt_redirect_number)
+diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
+index b7492aabe710..f3a4d2dcbf7a 100644
+--- a/net/ipv4/tcp.c
++++ b/net/ipv4/tcp.c
+@@ -2253,7 +2253,6 @@ int tcp_disconnect(struct sock *sk, int flags)
+ 	tp->write_seq += tp->max_window + 2;
+ 	if (tp->write_seq == 0)
+ 		tp->write_seq = 1;
+-	icsk->icsk_backoff = 0;
+ 	tp->snd_cwnd = 2;
+ 	icsk->icsk_probes_out = 0;
+ 	tp->packets_out = 0;
+diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
+index ee8399f11fd0..b3d6b8e77300 100644
+--- a/net/ipv4/tcp_ipv4.c
++++ b/net/ipv4/tcp_ipv4.c
+@@ -466,14 +466,15 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
+ 		if (sock_owned_by_user(sk))
+ 			break;
+ 
++		skb = tcp_write_queue_head(sk);
++		if (WARN_ON_ONCE(!skb))
++			break;
++
+ 		icsk->icsk_backoff--;
+ 		icsk->icsk_rto = tp->srtt_us ? __tcp_set_rto(tp) :
+ 					       TCP_TIMEOUT_INIT;
+ 		icsk->icsk_rto = inet_csk_rto_backoff(icsk, TCP_RTO_MAX);
+ 
+-		skb = tcp_write_queue_head(sk);
+-		BUG_ON(!skb);
+-
+ 		remaining = icsk->icsk_rto -
+ 			    min(icsk->icsk_rto,
+ 				tcp_time_stamp - tcp_skb_timestamp(skb));
+diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
+index 4dde1e0e7d37..086cdf9f0501 100644
+--- a/net/ipv6/addrconf.c
++++ b/net/ipv6/addrconf.c
+@@ -1043,7 +1043,8 @@ check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
+ 	list_for_each_entry(ifa, &idev->addr_list, if_list) {
+ 		if (ifa == ifp)
+ 			continue;
+-		if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
++		if (ifa->prefix_len != ifp->prefix_len ||
++		    !ipv6_prefix_equal(&ifa->addr, &ifp->addr,
+ 				       ifp->prefix_len))
+ 			continue;
+ 		if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))
+diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
+index d24773552b64..217810674c35 100644
+--- a/net/vmw_vsock/vmci_transport.c
++++ b/net/vmw_vsock/vmci_transport.c
+@@ -1656,6 +1656,10 @@ static void vmci_transport_cleanup(struct work_struct *work)
+ 
+ static void vmci_transport_destruct(struct vsock_sock *vsk)
+ {
++	/* transport can be NULL if we hit a failure at init() time */
++	if (!vmci_trans(vsk))
++		return;
++
+ 	/* Ensure that the detach callback doesn't use the sk/vsk
+ 	 * we are about to destruct.
+ 	 */
+diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
+index c6ab4da4b8e2..8d7b2802d33f 100644
+--- a/net/x25/af_x25.c
++++ b/net/x25/af_x25.c
+@@ -352,17 +352,15 @@ static unsigned int x25_new_lci(struct x25_neigh *nb)
+ 	unsigned int lci = 1;
+ 	struct sock *sk;
+ 
+-	read_lock_bh(&x25_list_lock);
+-
+-	while ((sk = __x25_find_socket(lci, nb)) != NULL) {
++	while ((sk = x25_find_socket(lci, nb)) != NULL) {
+ 		sock_put(sk);
+ 		if (++lci == 4096) {
+ 			lci = 0;
+ 			break;
+ 		}
++		cond_resched();
+ 	}
+ 
+-	read_unlock_bh(&x25_list_lock);
+ 	return lci;
+ }
+ 
+diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
+index e4be695eb789..fce48d11ae07 100644
+--- a/virt/kvm/kvm_main.c
++++ b/virt/kvm/kvm_main.c
+@@ -2711,14 +2711,15 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
+ 		return ret;
+ 	}
+ 
++	kvm_get_kvm(kvm);
+ 	ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC);
+ 	if (ret < 0) {
++		kvm_put_kvm(kvm);
+ 		ops->destroy(dev);
+ 		return ret;
+ 	}
+ 
+ 	list_add(&dev->vm_node, &kvm->devices);
+-	kvm_get_kvm(kvm);
+ 	cd->fd = ret;
+ 	return 0;
+ }