Tetsuo Handa bb68d6a60a net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL. ...

commit 3bc53be9db21040b5d2de4d455f023c8c494aa68 upstream.

syzbot is reporting stalls at nfc_llcp_send_ui_frame() [1]. This is
because nfc_llcp_send_ui_frame() is retrying the loop without any delay
when nonblocking nfc_alloc_send_skb() returned NULL.

Since there is no need to use MSG_DONTWAIT if we retry until
sock_alloc_send_pskb() succeeds, let's use blocking call.
Also, in case an unexpected error occurred, let's break the loop
if blocking nfc_alloc_send_skb() failed.

[1] https://syzkaller.appspot.com/bug?id=4a131cc571c3733e0eff6bc673f4e36ae48f19c6

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+d29d18215e477cfbfbdd@syzkaller.appspotmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-07-22 14:25:54 +02:00

..

6lowpan

…

9p

net/9p: Switch to wait_event_killable()

2017-11-30 08:37:25 +00:00

802

…

8021q

vlan: also check phy_driver ts_info for vlan's real device

2018-04-13 19:50:25 +02:00

appletalk

…

atm

net: atm: Fix potential Spectre v1

2018-05-16 10:06:51 +02:00

ax25

ax25: Fix segfault after sock connection timeout

2017-02-04 09:45:09 +01:00

batman-adv

batman-adv: fix packet loss for broadcasted DHCP packets to a server

2018-05-30 07:49:06 +02:00

bluetooth

Bluetooth: Fix connection if directed advertising and privacy is used

2018-07-03 11:21:35 +02:00

bridge

netfilter: ebtables: reject non-bridge targets

2018-07-22 14:25:54 +02:00

caif

net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx

2017-07-05 14:37:14 +02:00

can

can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once

2018-01-31 12:06:08 +01:00

ceph

libceph: validate con->state at the top of try_write()

2018-05-02 07:53:42 -07:00

core

rtnetlink: validate attributes in do_setlink()

2018-06-13 16:15:29 +02:00

dcb

…

dccp

net: dccp: switch rx_tstamp_last_feedback to monotonic clock

2018-07-22 14:25:52 +02:00

decnet

dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock

2018-02-25 11:03:38 +01:00

dns_resolver

KEYS: DNS: fix parsing multiple options

2018-07-22 14:25:54 +02:00

dsa

net: dsa: select NET_SWITCHDEV

2017-11-15 17:13:11 +01:00

ethernet

net: introduce device min_header_len

2017-02-18 16:39:27 +01:00

hsr

net/hsr: fix a warning message

2015-11-23 14:56:15 -05:00

ieee802154

net: ieee802154: fix net_device reference release too early

2018-04-13 19:50:10 +02:00

ipv4

tcp: prevent bogus FRTO undos with non-SACK flows

2018-07-22 14:25:53 +02:00

ipv6

Revert "sit: reload iphdr in ipip6_rcv"

2018-07-22 14:25:52 +02:00

ipx

ipx: call ipxitf_put() in ioctl error path

2017-05-25 14:30:13 +02:00

irda

irda: do not leak initialized list.dev to userspace

2017-08-30 10:19:21 +02:00

iucv

net/iucv: Free memory obtained by kzalloc

2018-03-31 18:12:33 +02:00

key

af_key: Always verify length of provided sadb_key

2018-06-16 09:54:25 +02:00

l2tp

l2tp: revert "l2tp: fix missing print session offset info"

2018-05-26 08:48:50 +02:00

l3mdev

…

lapb

…

llc

llc: properly handle dev_queue_xmit() return value

2018-05-30 07:49:06 +02:00

mac80211

mac80211: Add RX flag to indicate ICV stripped

2018-05-16 10:06:46 +02:00

mac802154

…

mpls

mpls, nospec: Sanitize array index in mpls_label_ok()

2018-03-11 16:19:47 +01:00

netfilter

netfilter: nf_queue: augment nfqa_cfg_policy

2018-07-17 11:31:46 +02:00

netlabel

netlabel: If PF_INET6, check sk_buff ip header version

2018-05-30 07:49:17 +02:00

netlink

netlink: fix uninit-value in netlink_sendmsg

2018-05-16 10:06:50 +02:00

netrom

…

nfc

net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL.

2018-07-22 14:25:54 +02:00

openvswitch

openvswitch: Don't swap table in nlattr_set() after OVS_ATTR_NESTED is found

2018-05-26 08:48:47 +02:00

packet

packet: fix reserve calculation

2018-06-13 16:15:28 +02:00

phonet

phonet: properly unshare skbs in phonet_rcv()

2016-01-31 11:29:00 -08:00

rds

rds: avoid unenecessary cong_update in loop transport

2018-07-22 14:25:54 +02:00

rfkill

rfkill: gpio: fix memory leak in probe error path

2018-05-16 10:06:51 +02:00

rose

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rxrpc

rxrpc: check return value of skb_to_sgvec always

2018-04-13 19:50:23 +02:00

sched

net_sched: blackhole: tell upper qdisc about dropped packets

2018-07-22 14:25:53 +02:00

sctp

sctp: delay the authentication for the duplicated cookie-echo chunk

2018-05-26 08:48:49 +02:00

sunrpc

rpc_pipefs: fix double-dput()

2018-04-24 09:32:11 +02:00

switchdev

switchdev: pass pointer to fib_info instead of copy

2016-06-24 10:18:16 -07:00

tipc

tipc: add policy for TIPC_NLA_NET_ADDR

2018-04-29 07:50:06 +02:00

unix

net/unix: don't show information about sockets from other namespaces

2017-11-18 11:11:06 +01:00

vmw_vsock

vsock: use new wait API for vsock_stream_sendmsg()

2017-11-30 08:37:19 +00:00

wimax

…

wireless

cfg80211: limit wiphy names to 128 bytes

2018-05-26 08:49:00 +02:00

x25

net: x25: fix one potential use-after-free issue

2018-04-13 19:50:07 +02:00

xfrm

xfrm: skip policies marked as dead while rehashing

2018-07-03 11:21:32 +02:00

compat.c

net: support compat 64-bit time in {s,g}etsockopt

2018-05-26 08:48:47 +02:00

Kconfig

Make DST_CACHE a silent config option

2018-02-25 11:03:37 +01:00

Makefile

…

socket.c

bpf: introduce BPF_JIT_ALWAYS_ON config

2018-02-03 17:04:24 +01:00

sysctl_net.c

net: Use ns_capable_noaudit() when determining net sysctl permissions

2016-09-15 08:27:50 +02:00