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linux-brain/net
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Matthew Wilcox (Oracle) ecdf893c5a mm: fix struct page layout on 32-bit systems 
commit 9ddb3c14afba8bc5950ed297f02d4ae05ff35cd1 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-19 10:08:31 +02:00
..
6lowpan 6lowpan: no need to check return value of debugfs_create functions 2019-07-06 12:50:01 +02:00
9p net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid 2020-11-05 11:43:20 +01:00
802 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
8021q net: vlan: avoid leaks on register_vlan_dev() failures 2021-01-17 14:05:31 +01:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-04-07 14:47:41 +02:00
atm atm: fix a memory leak of vcc->user_back 2020-10-01 13:17:58 +02:00
ax25 AX.25: Prevent integer overflows in connect and sendmsg 2020-07-31 18:39:31 +02:00
batman-adv batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field 2021-04-14 08:24:11 +02:00
bluetooth Bluetooth: check for zapped sk before connecting 2021-05-19 10:08:21 +02:00
bpf bpf/flow_dissector: support flags in BPF_PROG_TEST_RUN 2019-07-25 18:00:41 -07:00
bpfilter net/bpfilter: remove superfluous testing message 2020-04-21 09:04:53 +02:00
bridge net: bridge: when suppression is enabled exclude RARP packets 2021-05-19 10:08:21 +02:00
caif net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
can can: bcm/raw: fix msg_namelen values depending on CAN_REQUIRED_SIZE 2021-04-14 08:24:14 +02:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2020-11-05 11:43:34 +01:00
core mm: fix struct page layout on 32-bit systems 2021-05-19 10:08:31 +02:00
dcb net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands 2021-01-23 15:57:59 +01:00
dccp ipv6: weaken the v4mapped source check 2021-04-07 14:47:38 +02:00
decnet net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2020-01-04 19:18:58 +01:00
dns_resolver KEYS: Don't write out to userspace while holding key semaphore 2020-04-23 10:36:45 +02:00
dsa net: dsa: tag_mtk: fix 802.1ad VLAN egress 2021-03-20 10:39:47 +01:00
ethernet net: add annotations on hh->hh_len lockless accesses 2020-01-09 10:20:06 +01:00
hsr hsr: use netdev_err() instead of WARN_ONCE() 2021-05-14 09:44:10 +02:00
ieee802154 net: ieee802154: forbid monitor for add llsec seclevel 2021-04-21 12:56:15 +02:00
ife net: Fix Kconfig indentation 2019-09-26 08:56:17 +02:00
ipv4 net: Only allow init netns to set default tcp cong to a restricted algo 2021-05-14 09:44:33 +02:00
ipv6 ip6_vti: proper dev_{hold|put} in ndo_[un]init methods 2021-05-19 10:08:21 +02:00
iucv net/af_iucv: remove WARN_ONCE on malformed RX packets 2021-03-07 12:20:42 +01:00
kcm kcm: disable preemption in kcm_parse_func_strparser() 2019-09-27 10:27:14 +02:00
key af_key: relax availability checks for skb size calculation 2021-02-13 13:52:54 +01:00
l2tp l2tp: remove skb_dst_set() from l2tp_xmit_skb() 2020-07-22 09:32:47 +02:00
l3mdev ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF 2019-06-23 13:24:17 -07:00
lapb net: lapb: Copy the skb before sending a packet 2021-02-10 09:25:28 +01:00
llc net: silence data-races on sk_backlog.tail 2020-10-01 13:17:15 +02:00
mac80211 mac80211: clear the beacon's CRC after channel switch 2021-05-19 10:08:22 +02:00
mac802154 net: mac802154: Fix general protection fault 2021-04-14 08:24:18 +02:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-03-17 17:03:31 +01:00
ncsi net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-04-14 08:24:15 +02:00
netfilter netfilter: nftables: avoid overflows in nft_hash_buckets() 2021-05-19 10:08:28 +02:00
netlabel cipso,calipso: resolve a number of problems with the DOI refcounts 2021-03-17 17:03:35 +01:00
netlink genetlink: remove genl_bind 2020-07-22 09:32:46 +02:00
netrom net: netrom: Fix potential nr_neigh refcnt leak in nr_add_node 2020-04-29 16:33:08 +02:00
nfc net:nfc:digital: Fix a double free in digital_tg_recv_dep_req 2021-05-14 09:44:32 +02:00
nsh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
openvswitch openvswitch: fix stack OOB read while fragmenting IPv4 packets 2021-05-11 14:04:14 +02:00
packet net/packet: fix overflow in tpacket_rcv 2020-09-09 19:12:29 +02:00
phonet net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
psample net: psample: fix skb_over_panic 2019-12-04 22:30:54 +01:00
qrtr net: qrtr: fix a kernel-infoleak in qrtr_recvmsg() 2021-03-30 14:35:29 +02:00
rds net/rds: Fix a use after free in rds_message_map_pages 2021-04-14 08:24:15 +02:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-24 13:29:05 +01:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-12-08 10:40:23 +01:00
rxrpc rxrpc: Fix clearance of Tx/Rx ring when releasing a call 2021-02-17 10:35:18 +01:00
sched net: sched: tapr: prevent cycle_time == 0 in parse_taprio_schedule 2021-05-19 10:08:23 +02:00
sctp sctp: fix a SCTP_MIB_CURRESTAB leak in sctp_sf_do_dupcook_b 2021-05-19 10:08:27 +02:00
smc smc: disallow TCP_ULP in smc_setsockopt() 2021-05-19 10:08:28 +02:00
strparser Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-22 08:59:24 -04:00
sunrpc sunrpc: Fix misplaced barrier in call_decode 2021-05-19 10:08:27 +02:00
switchdev net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP 2021-02-07 15:35:46 +01:00
tipc tipc: convert dest node's address to network order 2021-05-19 10:08:20 +02:00
tls net/tls: Protect from calling tls_dev_del for TLS RX twice 2020-12-08 10:40:23 +01:00
unix skbuff: fix a data race in skb_queue_len() 2020-10-01 13:17:31 +02:00
vmw_vsock vsock/vmci: log once the failed queue pair allocation 2021-05-14 09:44:30 +02:00
wimax wimax: no need to check return value of debugfs_create functions 2019-08-10 15:25:47 -07:00
wireless cfg80211: scan: drop entry from hidden_list on overflow 2021-05-14 09:44:13 +02:00
x25 net/x25: prevent a couple of overflows 2020-12-08 10:40:26 +01:00
xdp xsk: Replace datagram_poll by sock_poll_wait 2020-12-30 11:50:53 +01:00
xfrm net: xfrm: Localize sequence counter per network namespace 2021-04-14 08:24:13 +02:00
compat.c net/compat: Add missing sock updates for SCM_RIGHTS 2020-08-21 13:05:25 +02:00
Kconfig net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build 2020-04-01 11:02:18 +02:00
Makefile
socket.c net: Set fput_needed iff FDPUT_FPUT is set 2020-08-19 08:16:22 +02:00
sysctl_net.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00