AuxXxilium/linux_dsm_epyc7002
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93c5951e0c
linux_dsm_epyc7002/net
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Miklos Szeredi 93c5951e0c af_unix: fix garbage collect vs MSG_PEEK 
commit cbcf01128d0a92e131bd09f1688fe032480b65ca upstream.

unix_gc() assumes that candidate sockets can never gain an external
reference (i.e.  be installed into an fd) while the unix_gc_lock is
held.  Except for MSG_PEEK this is guaranteed by modifying inflight
count under the unix_gc_lock.

MSG_PEEK does not touch any variable protected by unix_gc_lock (file
count is not), yet it needs to be serialized with garbage collection.
Do this by locking/unlocking unix_gc_lock:

 1) increment file count

 2) lock/unlock barrier to make sure incremented file count is visible
    to garbage collection

 3) install file into fd

This is a lock barrier (unlike smp_mb()) that ensures that garbage
collection is run completely before or completely after the barrier.

Cc: <stable@vger.kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-31 08:16:11 +02:00
..
6lowpan treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
9p net: 9p: advance iov on empty read 2021-04-07 15:00:08 +02:00
802
8021q net: vlan: avoid leaks on register_vlan_dev() failures 2021-01-17 14:16:55 +01:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-04-07 15:00:08 +02:00
atm net: atm: fix update of position index in lec_seq_next 2020-10-31 12:26:30 -07:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
batman-adv batman-adv: Avoid WARN_ON timing related checks 2021-06-23 14:42:41 +02:00
bluetooth Bluetooth: mgmt: Fix the command returns garbage parameter value 2021-07-19 09:44:54 +02:00
bpf bpf, test: fix NULL pointer dereference on invalid expected_attach_type 2021-07-28 14:35:37 +02:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-07-14 16:56:29 +02:00
bridge net: bridge: sync fdb to new unicast-filtering ports 2021-07-25 14:36:19 +02:00
caif net: fix uninit-value in caif_seqpkt_sendmsg 2021-07-28 14:35:38 +02:00
can can: j1939: j1939_sk_setsockopt(): prevent allocation of j1939 filter for optlen == 0 2021-07-14 16:56:27 +02:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2020-10-12 15:29:27 +02:00
core skbuff: Fix build with SKB extensions disabled 2021-07-28 14:35:48 +02:00
dcb net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands 2021-01-23 16:04:01 +01:00
dccp ipv6: weaken the v4mapped source check 2021-03-30 14:32:01 +02:00
decnet net: decnet: Fix sleeping inside in af_decnet 2021-07-28 14:35:38 +02:00
dns_resolver
dsa net: dsa: properly check for the bridge_leave methods in dsa_switch_bridge_leave() 2021-07-25 14:36:20 +02:00
ethernet net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
ethtool net: ethtool: clear heap allocations for ethtool function 2021-06-30 08:47:20 -04:00
hsr net: hsr: fix mac_len checks 2021-06-03 09:00:50 +02:00
ieee802154 net: ieee802154: fix null deref in parse dev addr 2021-06-18 10:00:03 +02:00
ife
ipv4 tcp: disable TFO blackhole logic by default 2021-07-28 14:35:41 +02:00
ipv6 ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions 2021-07-28 14:35:40 +02:00
iucv net/af_iucv: remove WARN_ONCE on malformed RX packets 2021-03-07 12:34:05 +01:00
kcm net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
key af_key: relax availability checks for skb size calculation 2021-02-13 13:55:02 +01:00
l2tp net: l2tp: reduce log level of messages in receive path, add counter instead 2021-03-17 17:06:11 +01:00
l3mdev net: Fix some comments 2020-08-27 07:55:59 -07:00
lapb net: lapb: Copy the skb before sending a packet 2021-02-10 09:29:14 +01:00
llc net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
mac80211 mac80211: consider per-CPU statistics if present 2021-07-19 09:44:53 +02:00
mac802154 net: mac802154: Fix general protection fault 2021-04-14 08:42:13 +02:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-03-17 17:06:11 +01:00
mptcp mptcp: fix warning in __skb_flow_dissect() when do syn cookie for subflow join 2021-07-28 14:35:34 +02:00
ncsi net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-04-14 08:42:08 +02:00
netfilter netfilter: ctnetlink: suspicious RCU usage in ctnetlink_dump_helpinfo 2021-07-25 14:36:19 +02:00
netlabel netlabel: Fix memory leak in netlbl_mgmt_add_common 2021-07-14 16:56:22 +02:00
netlink netlink: disable IRQs for netlink_lock_table() 2021-06-16 12:01:36 +02:00
netrom netrom: Decrease sock refcount when sock timers expire 2021-07-28 14:35:38 +02:00
nfc net/nfc/rawsock.c: fix a permission check bug 2021-06-16 12:01:35 +02:00
nsh treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
openvswitch openvswitch: meter: fix race when getting now_ms. 2021-06-03 09:00:47 +02:00
packet net/packet: annotate accesses to po->ifindex 2021-06-30 08:47:22 -04:00
phonet treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
psample net: psample: Fix netlink skb length with tunnel info 2021-03-07 12:34:07 +01:00
qrtr net: qrtr: ns: Fix error return code in qrtr_ns_init() 2021-07-14 16:56:16 +02:00
rds net: rds: fix memory leak in rds_recvmsg 2021-06-23 14:42:42 +02:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-12 09:18:06 +01:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-11-20 10:04:58 -08:00
rxrpc rxrpc: Fix clearance of Tx/Rx ring when releasing a call 2021-02-17 11:02:28 +01:00
sched net: sched: cls_api: Fix the the wrong parameter 2021-07-28 14:35:41 +02:00
sctp sctp: update active_key for asoc when old key is being replaced 2021-07-28 14:35:41 +02:00
smc net/smc: remove device from smcd_dev_list after failed device_add() 2021-06-03 09:00:48 +02:00
strparser
sunrpc SUNRPC: prevent port reuse on transports which don't request it. 2021-07-20 16:05:51 +02:00
switchdev net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP 2021-02-07 15:37:12 +01:00
tipc net: tipc: fix FB_MTU eat two pages 2021-07-14 16:56:32 +02:00
tls tls: prevent oversized sendfile() hangs by ignoring MSG_MORE 2021-07-14 16:56:24 +02:00
unix af_unix: fix garbage collect vs MSG_PEEK 2021-07-31 08:16:11 +02:00
vmw_vsock vsock: notify server to shutdown when client has pending signal 2021-07-19 09:44:52 +02:00
wimax genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
wireless cfg80211: fix default HE tx bitrate mask in 2G band 2021-07-19 09:44:53 +02:00
x25 net/x25: Return the correct errno code 2021-06-18 10:00:06 +02:00
xdp xsk: Fix broken Tx ring validation 2021-07-14 16:56:23 +02:00
xfrm xfrm: Fix error reporting in xfrm_state_construct. 2021-07-19 09:44:49 +02:00
compat.c net: Return the correct errno code 2021-06-18 10:00:06 +02:00
devres.c net: devres: rename the release callback of devm_register_netdev() 2020-06-30 15:57:34 -07:00
Kconfig drop_monitor: Convert to using devlink tracepoint 2020-09-30 18:01:26 -07:00
Makefile net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
socket.c net: make get_net_ns return error if NET_NS is disabled 2021-06-23 14:42:44 +02:00
sysctl_net.c