Linux patch 5.4.2015.4-206

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

2 files changed, 435 insertions, 0 deletions

diff --git a/0000_README b/0000_README
index c037210c..bbfa7b3c 100644
--- a/0000_README
+++ b/0000_README
@@ -843,6 +843,10 @@ Patch:  1199_linux-5.4.200.patch
 From:   http://www.kernel.org
 Desc:   Linux 5.4.200
 
+Patch:  1200_linux-5.4.201.patch
+From:   http://www.kernel.org
+Desc:   Linux 5.4.201
+
 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/1200_linux-5.4.201.patch b/1200_linux-5.4.201.patch
new file mode 100644
index 00000000..43053d56
--- /dev/null
+++ b/1200_linux-5.4.201.patch
@@ -0,0 +1,431 @@
+diff --git a/Documentation/hwmon/hwmon-kernel-api.rst b/Documentation/hwmon/hwmon-kernel-api.rst
+index 23f27fe78e379..c41eb61081036 100644
+--- a/Documentation/hwmon/hwmon-kernel-api.rst
++++ b/Documentation/hwmon/hwmon-kernel-api.rst
+@@ -72,7 +72,7 @@ hwmon_device_register_with_info is the most comprehensive and preferred means
+ to register a hardware monitoring device. It creates the standard sysfs
+ attributes in the hardware monitoring core, letting the driver focus on reading
+ from and writing to the chip instead of having to bother with sysfs attributes.
+-The parent device parameter as well as the chip parameter must not be NULL. Its
++The parent device parameter cannot be NULL with non-NULL chip info. Its
+ parameters are described in more detail below.
+ 
+ devm_hwmon_device_register_with_info is similar to
+diff --git a/Makefile b/Makefile
+index 32da9117e9d76..75be5870cc55f 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,7 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0
+ VERSION = 5
+ PATCHLEVEL = 4
+-SUBLEVEL = 200
++SUBLEVEL = 201
+ EXTRAVERSION =
+ NAME = Kleptomaniac Octopus
+ 
+diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S
+index db767b072601e..7b054c67acd81 100644
+--- a/arch/arm64/mm/cache.S
++++ b/arch/arm64/mm/cache.S
+@@ -228,8 +228,6 @@ ENDPIPROC(__dma_flush_area)
+  *	- dir	- DMA direction
+  */
+ ENTRY(__dma_map_area)
+-	cmp	w2, #DMA_FROM_DEVICE
+-	b.eq	__dma_inv_area
+ 	b	__dma_clean_area
+ ENDPIPROC(__dma_map_area)
+ 
+diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
+index 4438c00acb656..28ca07360e970 100644
+--- a/arch/s390/mm/pgtable.c
++++ b/arch/s390/mm/pgtable.c
+@@ -716,7 +716,7 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ 	pgste_val(pgste) |= PGSTE_GR_BIT | PGSTE_GC_BIT;
+ 	ptev = pte_val(*ptep);
+ 	if (!(ptev & _PAGE_INVALID) && (ptev & _PAGE_WRITE))
+-		page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 1);
++		page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 0);
+ 	pgste_set_unlock(ptep, pgste);
+ 	preempt_enable();
+ }
+diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
+index c73b93b9bb87d..a2175394cd253 100644
+--- a/drivers/hwmon/hwmon.c
++++ b/drivers/hwmon/hwmon.c
+@@ -715,12 +715,11 @@ EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups);
+ 
+ /**
+  * hwmon_device_register_with_info - register w/ hwmon
+- * @dev: the parent device (mandatory)
+- * @name: hwmon name attribute (mandatory)
+- * @drvdata: driver data to attach to created device (optional)
+- * @chip: pointer to hwmon chip information (mandatory)
++ * @dev: the parent device
++ * @name: hwmon name attribute
++ * @drvdata: driver data to attach to created device
++ * @chip: pointer to hwmon chip information
+  * @extra_groups: pointer to list of additional non-standard attribute groups
+- *	(optional)
+  *
+  * hwmon_device_unregister() must be called when the device is no
+  * longer needed.
+@@ -733,10 +732,13 @@ hwmon_device_register_with_info(struct device *dev, const char *name,
+ 				const struct hwmon_chip_info *chip,
+ 				const struct attribute_group **extra_groups)
+ {
+-	if (!dev || !name || !chip)
++	if (!name)
++		return ERR_PTR(-EINVAL);
++
++	if (chip && (!chip->ops || !chip->ops->is_visible || !chip->info))
+ 		return ERR_PTR(-EINVAL);
+ 
+-	if (!chip->ops || !chip->ops->is_visible || !chip->info)
++	if (chip && !dev)
+ 		return ERR_PTR(-EINVAL);
+ 
+ 	return __hwmon_device_register(dev, name, drvdata, chip, extra_groups);
+diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
+index 06b382304d926..81bc36a43b32d 100644
+--- a/drivers/md/dm-table.c
++++ b/drivers/md/dm-table.c
+@@ -872,8 +872,7 @@ EXPORT_SYMBOL(dm_consume_args);
+ static bool __table_type_bio_based(enum dm_queue_mode table_type)
+ {
+ 	return (table_type == DM_TYPE_BIO_BASED ||
+-		table_type == DM_TYPE_DAX_BIO_BASED ||
+-		table_type == DM_TYPE_NVME_BIO_BASED);
++		table_type == DM_TYPE_DAX_BIO_BASED);
+ }
+ 
+ static bool __table_type_request_based(enum dm_queue_mode table_type)
+@@ -929,8 +928,6 @@ bool dm_table_supports_dax(struct dm_table *t,
+ 	return true;
+ }
+ 
+-static bool dm_table_does_not_support_partial_completion(struct dm_table *t);
+-
+ static int device_is_rq_stackable(struct dm_target *ti, struct dm_dev *dev,
+ 				  sector_t start, sector_t len, void *data)
+ {
+@@ -960,7 +957,6 @@ static int dm_table_determine_type(struct dm_table *t)
+ 			goto verify_bio_based;
+ 		}
+ 		BUG_ON(t->type == DM_TYPE_DAX_BIO_BASED);
+-		BUG_ON(t->type == DM_TYPE_NVME_BIO_BASED);
+ 		goto verify_rq_based;
+ 	}
+ 
+@@ -999,15 +995,6 @@ verify_bio_based:
+ 		if (dm_table_supports_dax(t, device_not_dax_capable, &page_size) ||
+ 		    (list_empty(devices) && live_md_type == DM_TYPE_DAX_BIO_BASED)) {
+ 			t->type = DM_TYPE_DAX_BIO_BASED;
+-		} else {
+-			/* Check if upgrading to NVMe bio-based is valid or required */
+-			tgt = dm_table_get_immutable_target(t);
+-			if (tgt && !tgt->max_io_len && dm_table_does_not_support_partial_completion(t)) {
+-				t->type = DM_TYPE_NVME_BIO_BASED;
+-				goto verify_rq_based; /* must be stacked directly on NVMe (blk-mq) */
+-			} else if (list_empty(devices) && live_md_type == DM_TYPE_NVME_BIO_BASED) {
+-				t->type = DM_TYPE_NVME_BIO_BASED;
+-			}
+ 		}
+ 		return 0;
+ 	}
+@@ -1024,8 +1011,7 @@ verify_rq_based:
+ 	 * (e.g. request completion process for partial completion.)
+ 	 */
+ 	if (t->num_targets > 1) {
+-		DMERR("%s DM doesn't support multiple targets",
+-		      t->type == DM_TYPE_NVME_BIO_BASED ? "nvme bio-based" : "request-based");
++		DMERR("request-based DM doesn't support multiple targets");
+ 		return -EINVAL;
+ 	}
+ 
+@@ -1714,20 +1700,6 @@ static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev,
+ 	return q && !blk_queue_add_random(q);
+ }
+ 
+-static int device_is_partial_completion(struct dm_target *ti, struct dm_dev *dev,
+-					sector_t start, sector_t len, void *data)
+-{
+-	char b[BDEVNAME_SIZE];
+-
+-	/* For now, NVMe devices are the only devices of this class */
+-	return (strncmp(bdevname(dev->bdev, b), "nvme", 4) != 0);
+-}
+-
+-static bool dm_table_does_not_support_partial_completion(struct dm_table *t)
+-{
+-	return !dm_table_any_dev_attr(t, device_is_partial_completion, NULL);
+-}
+-
+ static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *dev,
+ 					 sector_t start, sector_t len, void *data)
+ {
+diff --git a/drivers/md/dm.c b/drivers/md/dm.c
+index 37b8bb4d80f0f..77e28f77c59f4 100644
+--- a/drivers/md/dm.c
++++ b/drivers/md/dm.c
+@@ -1000,7 +1000,7 @@ static void clone_endio(struct bio *bio)
+ 	struct mapped_device *md = tio->io->md;
+ 	dm_endio_fn endio = tio->ti->type->end_io;
+ 
+-	if (unlikely(error == BLK_STS_TARGET) && md->type != DM_TYPE_NVME_BIO_BASED) {
++	if (unlikely(error == BLK_STS_TARGET)) {
+ 		if (bio_op(bio) == REQ_OP_DISCARD &&
+ 		    !bio->bi_disk->queue->limits.max_discard_sectors)
+ 			disable_discard(md);
+@@ -1325,7 +1325,6 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
+ 	sector = clone->bi_iter.bi_sector;
+ 
+ 	if (unlikely(swap_bios_limit(ti, clone))) {
+-		struct mapped_device *md = io->md;
+ 		int latch = get_swap_bios();
+ 		if (unlikely(latch != md->swap_bios))
+ 			__set_swap_bios_limit(md, latch);
+@@ -1340,24 +1339,17 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
+ 		/* the bio has been remapped so dispatch it */
+ 		trace_block_bio_remap(clone->bi_disk->queue, clone,
+ 				      bio_dev(io->orig_bio), sector);
+-		if (md->type == DM_TYPE_NVME_BIO_BASED)
+-			ret = direct_make_request(clone);
+-		else
+-			ret = generic_make_request(clone);
++		ret = generic_make_request(clone);
+ 		break;
+ 	case DM_MAPIO_KILL:
+-		if (unlikely(swap_bios_limit(ti, clone))) {
+-			struct mapped_device *md = io->md;
++		if (unlikely(swap_bios_limit(ti, clone)))
+ 			up(&md->swap_bios_semaphore);
+-		}
+ 		free_tio(tio);
+ 		dec_pending(io, BLK_STS_IOERR);
+ 		break;
+ 	case DM_MAPIO_REQUEUE:
+-		if (unlikely(swap_bios_limit(ti, clone))) {
+-			struct mapped_device *md = io->md;
++		if (unlikely(swap_bios_limit(ti, clone)))
+ 			up(&md->swap_bios_semaphore);
+-		}
+ 		free_tio(tio);
+ 		dec_pending(io, BLK_STS_DM_REQUEUE);
+ 		break;
+@@ -1732,51 +1724,6 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
+ 	return ret;
+ }
+ 
+-/*
+- * Optimized variant of __split_and_process_bio that leverages the
+- * fact that targets that use it do _not_ have a need to split bios.
+- */
+-static blk_qc_t __process_bio(struct mapped_device *md, struct dm_table *map,
+-			      struct bio *bio, struct dm_target *ti)
+-{
+-	struct clone_info ci;
+-	blk_qc_t ret = BLK_QC_T_NONE;
+-	int error = 0;
+-
+-	init_clone_info(&ci, md, map, bio);
+-
+-	if (bio->bi_opf & REQ_PREFLUSH) {
+-		struct bio flush_bio;
+-
+-		/*
+-		 * Use an on-stack bio for this, it's safe since we don't
+-		 * need to reference it after submit. It's just used as
+-		 * the basis for the clone(s).
+-		 */
+-		bio_init(&flush_bio, NULL, 0);
+-		flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
+-		ci.bio = &flush_bio;
+-		ci.sector_count = 0;
+-		error = __send_empty_flush(&ci);
+-		bio_uninit(ci.bio);
+-		/* dec_pending submits any data associated with flush */
+-	} else {
+-		struct dm_target_io *tio;
+-
+-		ci.bio = bio;
+-		ci.sector_count = bio_sectors(bio);
+-		if (__process_abnormal_io(&ci, ti, &error))
+-			goto out;
+-
+-		tio = alloc_tio(&ci, ti, 0, GFP_NOIO);
+-		ret = __clone_and_map_simple_bio(&ci, tio, NULL);
+-	}
+-out:
+-	/* drop the extra reference count */
+-	dec_pending(ci.io, errno_to_blk_status(error));
+-	return ret;
+-}
+-
+ static blk_qc_t dm_process_bio(struct mapped_device *md,
+ 			       struct dm_table *map, struct bio *bio)
+ {
+@@ -1807,8 +1754,6 @@ static blk_qc_t dm_process_bio(struct mapped_device *md,
+ 		/* regular IO is split by __split_and_process_bio */
+ 	}
+ 
+-	if (dm_get_md_type(md) == DM_TYPE_NVME_BIO_BASED)
+-		return __process_bio(md, map, bio, ti);
+ 	return __split_and_process_bio(md, map, bio);
+ }
+ 
+@@ -2200,12 +2145,10 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
+ 	if (request_based)
+ 		dm_stop_queue(q);
+ 
+-	if (request_based || md->type == DM_TYPE_NVME_BIO_BASED) {
++	if (request_based) {
+ 		/*
+-		 * Leverage the fact that request-based DM targets and
+-		 * NVMe bio based targets are immutable singletons
+-		 * - used to optimize both dm_request_fn and dm_mq_queue_rq;
+-		 *   and __process_bio.
++		 * Leverage the fact that request-based DM targets are
++		 * immutable singletons - used to optimize dm_mq_queue_rq.
+ 		 */
+ 		md->immutable_target = dm_table_get_immutable_target(t);
+ 	}
+@@ -2334,7 +2277,6 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t)
+ 		break;
+ 	case DM_TYPE_BIO_BASED:
+ 	case DM_TYPE_DAX_BIO_BASED:
+-	case DM_TYPE_NVME_BIO_BASED:
+ 		dm_init_congested_fn(md);
+ 		break;
+ 	case DM_TYPE_NONE:
+@@ -3070,7 +3012,6 @@ struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, enum dm_qu
+ 	switch (type) {
+ 	case DM_TYPE_BIO_BASED:
+ 	case DM_TYPE_DAX_BIO_BASED:
+-	case DM_TYPE_NVME_BIO_BASED:
+ 		pool_size = max(dm_get_reserved_bio_based_ios(), min_pool_size);
+ 		front_pad = roundup(per_io_data_size, __alignof__(struct dm_target_io)) + offsetof(struct dm_target_io, clone);
+ 		io_front_pad = roundup(front_pad,  __alignof__(struct dm_io)) + offsetof(struct dm_io, tio);
+diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
+index 271bd08f4a255..3f053b11e2cee 100644
+--- a/drivers/usb/gadget/function/u_ether.c
++++ b/drivers/usb/gadget/function/u_ether.c
+@@ -772,9 +772,13 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g,
+ 	dev->qmult = qmult;
+ 	snprintf(net->name, sizeof(net->name), "%s%%d", netname);
+ 
+-	if (get_ether_addr(dev_addr, net->dev_addr))
++	if (get_ether_addr(dev_addr, net->dev_addr)) {
++		net->addr_assign_type = NET_ADDR_RANDOM;
+ 		dev_warn(&g->dev,
+ 			"using random %s ethernet address\n", "self");
++	} else {
++		net->addr_assign_type = NET_ADDR_SET;
++	}
+ 	if (get_ether_addr(host_addr, dev->host_mac))
+ 		dev_warn(&g->dev,
+ 			"using random %s ethernet address\n", "host");
+@@ -831,6 +835,9 @@ struct net_device *gether_setup_name_default(const char *netname)
+ 	INIT_LIST_HEAD(&dev->tx_reqs);
+ 	INIT_LIST_HEAD(&dev->rx_reqs);
+ 
++	/* by default we always have a random MAC address */
++	net->addr_assign_type = NET_ADDR_RANDOM;
++
+ 	skb_queue_head_init(&dev->rx_frames);
+ 
+ 	/* network device setup */
+@@ -868,7 +875,6 @@ int gether_register_netdev(struct net_device *net)
+ 	g = dev->gadget;
+ 
+ 	memcpy(net->dev_addr, dev->dev_mac, ETH_ALEN);
+-	net->addr_assign_type = NET_ADDR_RANDOM;
+ 
+ 	status = register_netdev(net);
+ 	if (status < 0) {
+@@ -908,6 +914,7 @@ int gether_set_dev_addr(struct net_device *net, const char *dev_addr)
+ 	if (get_ether_addr(dev_addr, new_addr))
+ 		return -EINVAL;
+ 	memcpy(dev->dev_mac, new_addr, ETH_ALEN);
++	net->addr_assign_type = NET_ADDR_SET;
+ 	return 0;
+ }
+ EXPORT_SYMBOL_GPL(gether_set_dev_addr);
+diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
+index a53d7d2c2d95c..60631f3abddbd 100644
+--- a/include/linux/device-mapper.h
++++ b/include/linux/device-mapper.h
+@@ -28,7 +28,6 @@ enum dm_queue_mode {
+ 	DM_TYPE_BIO_BASED	 = 1,
+ 	DM_TYPE_REQUEST_BASED	 = 2,
+ 	DM_TYPE_DAX_BIO_BASED	 = 3,
+-	DM_TYPE_NVME_BIO_BASED	 = 4,
+ };
+ 
+ typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
+diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
+index 959f4f0c85460..d9bee15e36a50 100644
+--- a/net/ipv4/inet_hashtables.c
++++ b/net/ipv4/inet_hashtables.c
+@@ -675,12 +675,14 @@ EXPORT_SYMBOL_GPL(inet_unhash);
+  * Note that we use 32bit integers (vs RFC 'short integers')
+  * because 2^16 is not a multiple of num_ephemeral and this
+  * property might be used by clever attacker.
+- * RFC claims using TABLE_LENGTH=10 buckets gives an improvement,
+- * we use 256 instead to really give more isolation and
+- * privacy, this only consumes 1 KB of kernel memory.
++ * RFC claims using TABLE_LENGTH=10 buckets gives an improvement, though
++ * attacks were since demonstrated, thus we use 65536 instead to really
++ * give more isolation and privacy, at the expense of 256kB of kernel
++ * memory.
+  */
+-#define INET_TABLE_PERTURB_SHIFT 8
+-static u32 table_perturb[1 << INET_TABLE_PERTURB_SHIFT];
++#define INET_TABLE_PERTURB_SHIFT 16
++#define INET_TABLE_PERTURB_SIZE (1 << INET_TABLE_PERTURB_SHIFT)
++static u32 *table_perturb;
+ 
+ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+ 		struct sock *sk, u64 port_offset,
+@@ -723,10 +725,11 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+ 	if (likely(remaining > 1))
+ 		remaining &= ~1U;
+ 
+-	net_get_random_once(table_perturb, sizeof(table_perturb));
+-	index = hash_32(port_offset, INET_TABLE_PERTURB_SHIFT);
++	net_get_random_once(table_perturb,
++			    INET_TABLE_PERTURB_SIZE * sizeof(*table_perturb));
++	index = port_offset & (INET_TABLE_PERTURB_SIZE - 1);
+ 
+-	offset = READ_ONCE(table_perturb[index]) + port_offset;
++	offset = READ_ONCE(table_perturb[index]) + (port_offset >> 32);
+ 	offset %= remaining;
+ 
+ 	/* In first pass we try ports of @low parity.
+@@ -782,6 +785,12 @@ next_port:
+ 	return -EADDRNOTAVAIL;
+ 
+ ok:
++	/* Here we want to add a little bit of randomness to the next source
++	 * port that will be chosen. We use a max() with a random here so that
++	 * on low contention the randomness is maximal and on high contention
++	 * it may be inexistent.
++	 */
++	i = max_t(int, i, (prandom_u32() & 7) * 2);
+ 	WRITE_ONCE(table_perturb[index], READ_ONCE(table_perturb[index]) + i + 2);
+ 
+ 	/* Head lock still held and bh's disabled */
+@@ -855,6 +864,12 @@ void __init inet_hashinfo2_init(struct inet_hashinfo *h, const char *name,
+ 					    low_limit,
+ 					    high_limit);
+ 	init_hashinfo_lhash2(h);
++
++	/* this one is used for source ports of outgoing connections */
++	table_perturb = kmalloc_array(INET_TABLE_PERTURB_SIZE,
++				      sizeof(*table_perturb), GFP_KERNEL);
++	if (!table_perturb)
++		panic("TCP: failed to alloc table_perturb");
+ }
+ 
+ int inet_hashinfo2_init_mod(struct inet_hashinfo *h)