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Oleksij Rempel 509ab6bfdd can: j1939: fix Use-after-Free, hold skb ref while in use 
commit 2030043e616cab40f510299f09b636285e0a3678 upstream.

This patch fixes a Use-after-Free found by the syzbot.

The problem is that a skb is taken from the per-session skb queue,
without incrementing the ref count. This leads to a Use-after-Free if
the skb is taken concurrently from the session queue due to a CTS.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Link: https://lore.kernel.org/r/20210521115720.7533-1-o.rempel@pengutronix.de
Cc: Hillf Danton <hdanton@sina.com>
Cc: linux-stable <stable@vger.kernel.org>
Reported-by: syzbot+220c1a29987a9a490903@syzkaller.appspotmail.com
Reported-by: syzbot+45199c1b73b4013525cf@syzkaller.appspotmail.com
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-23 14:42:50 +02:00
..
6lowpan
…
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: use correct lock to prevent UAF of hdev object
2021-06-10 13:39:23 +02:00
bpf
bpf: Reject too big ctx_size_in for raw_tp test run
2021-01-27 11:55:07 +01:00
bpfilter
Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"
2020-10-15 12:33:24 -07:00
bridge
bridge: Fix possible races between assigning rx_handler_data and setting IFF_BRIDGE_PORT bit
2021-05-22 11:40:54 +02:00
caif
net: caif: fix memory leak in cfusbl_device_notify
2021-06-10 13:39:25 +02:00
can
can: j1939: fix Use-after-Free, hold skb ref while in use
2021-06-23 14:42:50 +02:00
ceph
libceph: clear con->out_msg on Policy::stateful_server faults
2020-10-12 15:29:27 +02:00
core
net: make get_net_ns return error if NET_NS is disabled
2021-06-23 14:42:44 +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
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
dns_resolver
…
dsa
net: dsa: tag_8021q: fix the VLAN IDs used for encoding sub-VLANs
2021-06-10 13:39:17 +02:00
ethernet
…
ethtool
ethtool: strset: fix message length calculation
2021-06-23 14:42:45 +02:00
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
icmp: don't send out ICMP messages with a source address of 0.0.0.0
2021-06-23 14:42:47 +02:00
ipv6
udp: fix race between close() and udp_abort()
2021-06-23 14:42:42 +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: fix skb length check in ieee80211_scan_rx()
2021-06-23 14:42:41 +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: do not warn on bad input from the network
2021-06-23 14:42:43 +02:00
ncsi
net/ncsi: Avoid channel_monitor hrtimer deadlock
2021-04-14 08:42:08 +02:00
netfilter
netfilter: synproxy: Fix out of bounds when parsing TCP options
2021-06-23 14:42:43 +02:00
netlabel
cipso,calipso: resolve a number of problems with the DOI refcounts
2021-03-17 17:06:15 +01:00
netlink
netlink: disable IRQs for netlink_lock_table()
2021-06-16 12:01:36 +02:00
netrom
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
nfc
net/nfc/rawsock.c: fix a permission check bug
2021-06-16 12:01:35 +02:00
nsh
…
openvswitch
openvswitch: meter: fix race when getting now_ms.
2021-06-03 09:00:47 +02:00
packet
net: packetmmap: fix only tx timestamp on request
2021-06-03 09:00:46 +02:00
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: fix OOB Read in qrtr_endpoint_post
2021-06-23 14:42:45 +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
sch_cake: Fix out of bounds when parsing TCP options and header
2021-06-23 14:42:43 +02:00
sctp
sctp: fix a SCTP_MIB_CURRESTAB leak in sctp_sf_do_dupcook_b
2021-05-19 10:13:06 +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: More fixes for backlog congestion
2021-06-03 09:00:51 +02:00
switchdev
net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP
2021-02-07 15:37:12 +01:00
tipc
tipc: fix unique bearer names sanity check
2021-06-10 13:39:22 +02:00
tls
net/tls: Fix use-after-free after the TLS device goes down and up
2021-06-10 13:39:18 +02:00
unix
net/af_unix: fix a data-race in unix_dgram_sendmsg / unix_release_sock
2021-06-23 14:42:46 +02:00
vmw_vsock
vsock/virtio: free queued packets when closing socket
2021-05-14 09:50:41 +02:00
wimax
genetlink: move to smaller ops wherever possible
2020-10-02 19:11:11 -07:00
wireless
cfg80211: mitigate A-MSDU aggregation attacks
2021-06-03 09:00:29 +02:00
x25
net/x25: Return the correct errno code
2021-06-18 10:00:06 +02:00
xdp
xsk: Fix for xp_aligned_validate_desc() when len == chunk_size
2021-05-19 10:13:06 +02:00
xfrm
xfrm: BEET mode doesn't support fragments for inner packets
2021-04-21 13:00:51 +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
…
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
…