Matthew Wilcox (Oracle) 9ddb3c14af mm: fix struct page layout on 32-bit systems ... 32-bit architectures which expect 8-byte alignment for 8-byte integers and need 64-bit DMA addresses (arm, mips, ppc) had their struct page inadvertently expanded in 2019. When the dma_addr_t was added, it forced the alignment of the union to 8 bytes, which inserted a 4 byte gap between 'flags' and the union. Fix this by storing the dma_addr_t in one or two adjacent unsigned longs. This restores the alignment to that of an unsigned long. We always store the low bits in the first word to prevent the PageTail bit from being inadvertently set on a big endian platform. If that happened, get_user_pages_fast() racing against a page which was freed and reallocated to the page_pool could dereference a bogus compound_head(), which would be hard to trace back to this cause. Link: https://lkml.kernel.org/r/20210510153211.1504886-1-willy@infradead.org Fixes: c25fff7171 ("mm: add dma_addr_t to struct page") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Matteo Croce <mcroce@linux.microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-05-14 19:41:32 -07:00
..
6lowpan	6lowpan: Fix some typos in nhc_udp.c	2021-03-24 17:52:11 -07:00
9p	net: 9p: Correct function names in the kerneldoc comments	2021-03-28 17:56:56 -07:00
802
8021q	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-04-26 12:00:00 -07:00
appletalk	appletalk: Fix skb allocation size in loopback case	2021-02-12 16:40:28 -08:00
atm	net: atm: pppoatm: use new API for wakeup tasklet	2021-01-29 18:24:05 -08:00
ax25	net/ax25: Delete obsolete TODO file	2021-03-30 16:54:50 -07:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-04-09 20:48:35 -07:00
bluetooth	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
bpf	bpf: selftests: Add kfunc_call test	2021-03-26 20:41:52 -07:00
bpfilter	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
bridge	bridge: Fix possible races between assigning rx_handler_data and setting IFF_BRIDGE_PORT bit	2021-04-29 15:33:17 -07:00
caif	net: caif: Use netif_rx_any_context().	2021-02-15 13:21:48 -08:00
can	can: proc: fix rcvlist_* header alignment on 64-bit system	2021-04-25 19:43:00 +02:00
ceph	Notable items here are a series to take advantage of David Howells'	2021-05-06 10:27:02 -07:00
core	mm: fix struct page layout on 32-bit systems	2021-05-14 19:41:32 -07:00
dcb	net: dcb: use obj-$(CONFIG_DCB) form in net/Makefile	2021-01-27 17:03:52 -08:00
dccp	net: dccp: use net_generic storage	2021-04-09 16:34:56 -07:00
decnet	net/decnet: Delete obsolete TODO file	2021-03-30 16:54:50 -07:00
dns_resolver	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
dsa	net: selftest: fix build issue if INET is disabled	2021-04-28 14:06:45 -07:00
ethernet	of: net: pass the dst buffer to of_get_mac_address()	2021-04-13 14:35:02 -07:00
ethtool	ethtool: fix missing NLM_F_MULTI flag when dumping	2021-05-05 12:41:10 -07:00
hsr	net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info	2021-05-03 13:33:54 -07:00
ieee802154	net: remove the new_ifindex argument from dev_change_net_namespace	2021-04-07 14:43:28 -07:00
ife	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
ipv4	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf	2021-05-07 16:10:12 -07:00
ipv6	net: Remove redundant assignment to err	2021-04-29 15:34:15 -07:00
iucv	iucv: af_iucv.c: Couple of typo fixes	2021-03-28 17:31:13 -07:00
kcm	kcm: kcmsock.c: Couple of typo fixes	2021-03-28 17:31:13 -07:00
key
l2tp	net: fix a concurrency bug in l2tp_tunnel_register()	2021-04-27 14:23:13 -07:00
l3mdev	l3mdev: Correct function names in the kerneldoc comments	2021-03-28 17:56:55 -07:00
lapb	net: lapb: Make "lapb_t1timer_running" able to detect an already running timer	2021-03-23 14:14:50 -07:00
llc	llc2: Remove redundant assignment to rc	2021-04-27 14:16:14 -07:00
mac80211	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
mac802154	net: mac802154: Fix general protection fault	2021-04-06 22:42:16 +02:00
mpls	mpls: Remove redundant assignment to err	2021-04-27 14:17:00 -07:00
mptcp	mptcp: fix splat when closing unaccepted socket	2021-05-07 15:53:40 -07:00
ncsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-04-09 20:48:35 -07:00
netfilter	netfilter: nftables: avoid potential overflows on 32bit arches	2021-05-07 10:01:39 +02:00
netlabel	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
netlink	netlink: don't call ->netlink_bind with table lock held	2021-04-16 17:01:04 -07:00
netrom	net: netrom: nr_in: Remove redundant assignment to ns	2021-04-28 13:59:08 -07:00
nfc	net/nfc: fix use-after-free llcp_sock_bind/connect	2021-05-04 11:59:48 -07:00
nsh
openvswitch	openvswitch: fix stack OOB read while fragmenting IPv4 packets	2021-04-29 15:31:53 -07:00
packet	net/packet: remove data races in fanout operations	2021-04-14 14:34:38 -07:00
phonet
psample	psample: Add additional metadata attributes	2021-03-14 15:00:43 -07:00
qrtr	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-04-26 12:00:00 -07:00
rds	RDMA merge window pull request	2021-05-01 09:15:05 -07:00
rfkill	Another set of updates, all over the map:	2021-04-20 16:44:04 -07:00
rose	net: rose: Fix fall-through warnings for Clang	2021-03-10 12:45:15 -08:00
rxrpc	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
sched	net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets	2021-04-29 15:31:53 -07:00
sctp	sctp: delay auto_asconf init until binding the first addr	2021-05-03 13:36:21 -07:00
smc	smc: disallow TCP_ULP in smc_setsockopt()	2021-05-05 12:52:45 -07:00
strparser
sunrpc	NFS client updates for Linux 5.13	2021-05-07 11:23:41 -07:00
switchdev	net: bridge: propagate extack through switchdev_port_attr_set	2021-02-14 17:38:11 -08:00
tipc	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
tls	net/tls: Remove redundant initialization of record	2021-04-27 14:15:19 -07:00
unix	af_unix: handle idmapped mounts	2021-01-24 14:27:18 +01:00
vmw_vsock	vsock/vmci: Remove redundant assignment to err	2021-04-30 15:00:59 -07:00
wireless	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
x25	af_x25.c: Fix a spello	2021-03-28 17:31:13 -07:00
xdp	xsk: Fix for xp_aligned_validate_desc() when len == chunk_size	2021-05-04 00:28:06 +02:00
xfrm	xfrm: ipcomp: remove unnecessary get_cpu()	2021-04-19 12:49:29 +02:00
compat.c
devres.c
Kconfig	net: selftest: fix build issue if INET is disabled	2021-04-28 14:06:45 -07:00
Makefile	net: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile	2021-01-27 17:03:52 -08:00
socket.c	net: Fix a misspell in socket.c	2021-03-25 16:56:27 -07:00
sysctl_net.c	net: Ensure net namespace isolation of sysctls	2021-04-12 13:27:11 -07:00