TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
v4.9.272
twx-linux/net
T
History
Krzysztof Kozlowski 39c15bd2e5 nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect 
commit 4ac06a1e01 upstream.

It's possible to trigger NULL pointer dereference by local unprivileged
user, when calling getsockname() after failed bind() (e.g. the bind
fails because LLCP_SAP_MAX used as SAP):

  BUG: kernel NULL pointer dereference, address: 0000000000000000
  CPU: 1 PID: 426 Comm: llcp_sock_getna Not tainted 5.13.0-rc2-next-20210521+ #9
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1 04/01/2014
  Call Trace:
   llcp_sock_getname+0xb1/0xe0
   __sys_getpeername+0x95/0xc0
   ? lockdep_hardirqs_on_prepare+0xd5/0x180
   ? syscall_enter_from_user_mode+0x1c/0x40
   __x64_sys_getpeername+0x11/0x20
   do_syscall_64+0x36/0x70
   entry_SYSCALL_64_after_hwframe+0x44/0xae

This can be reproduced with Syzkaller C repro (bind followed by
getpeername):
https://syzkaller.appspot.com/x/repro.c?x=14def446e00000

Cc: <stable@vger.kernel.org>
Fixes: d646960f79 ("NFC: Initial LLCP support")
Reported-by: syzbot+80fb126e7f7d8b1a5914@syzkaller.appspotmail.com
Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531072138.5219-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-10 12:42:36 +02:00
..
6lowpan
…
9p
net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid
2020-11-10 10:23:54 +01:00
802
…
8021q
…
appletalk
appletalk: Fix skb allocation size in loopback case
2021-04-07 12:05:39 +02:00
atm
atm: fix a memory leak of vcc->user_back
2020-10-01 20:40:12 +02:00
ax25
AX.25: Prevent integer overflows in connect and sendmsg
2020-07-31 16:44:06 +02:00
batman-adv
batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field
2021-04-16 11:59:07 +02:00
bluetooth
Bluetooth: use correct lock to prevent UAF of hdev object
2021-06-10 12:42:36 +02:00
bridge
net: bridge: vlan: fix error return code in __vlan_add()
2020-12-29 13:44:48 +01:00
caif
net: caif: fix memory leak in cfusbl_device_notify
2021-06-10 12:42:36 +02:00
can
…
ceph
libceph: clear con->out_msg on Policy::stateful_server faults
2020-11-10 10:23:59 +01:00
core
neighbour: Disregard DEAD dst in neigh_update
2021-04-28 12:07:15 +02:00
dcb
net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands
2021-01-23 15:38:18 +01:00
dccp
ipv6: weaken the v4mapped source check
2021-04-07 12:05:38 +02:00
decnet
…
dns_resolver
…
dsa
…
ethernet
…
hsr
hsr: use netdev_err() instead of WARN_ONCE()
2021-05-22 10:40:20 +02:00
ieee802154
ieee802154: fix error return code in ieee802154_llsec_getparams()
2021-06-10 12:42:35 +02:00
ipv4
netfilter: x_tables: fix compat match/target pad out-of-bound write
2021-04-16 11:59:12 +02:00
ipv6
mld: fix panic in mld_newpack()
2021-06-03 08:23:32 +02:00
ipx
…
irda
…
iucv
net/af_iucv: set correct sk_protocol for child sockets
2020-12-11 13:37:56 +01:00
kcm
…
key
af_key: relax availability checks for skb size calculation
2021-02-23 13:59:14 +01:00
l2tp
l2tp: fix races with ipv4-mapped ipv6 addresses
2021-01-09 13:35:49 +01:00
l3mdev
…
lapb
net: lapb: Copy the skb before sending a packet
2021-02-10 09:09:25 +01:00
llc
llc: make sure applications use ARPHRD_ETHER
2020-07-22 09:10:47 +02:00
mac80211
mac80211: extend protection against mixed key and fragment cache attacks
2021-06-03 08:23:28 +02:00
mac802154
net: mac802154: Fix general protection fault
2021-04-16 11:59:10 +02:00
mpls
net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0
2021-03-17 16:10:13 +01:00
ncsi
net/ncsi: Use real net-device for response handler
2021-01-12 19:49:01 +01:00
netfilter
netfilter: nfnetlink_cthelper: hit EBUSY on updates if size mismatches
2021-06-10 12:42:35 +02:00
netlabel
netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()
2020-11-24 13:02:56 +01:00
netlink
genetlink: remove genl_bind
2020-07-22 09:10:48 +02:00
netrom
…
nfc
nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect
2021-06-10 12:42:36 +02:00
openvswitch
openvswitch: fix stack OOB read while fragmenting IPv4 packets
2021-05-22 10:40:19 +02:00
packet
net/packet: fix overflow in tpacket_rcv
2020-10-14 09:48:13 +02:00
phonet
…
qrtr
net: qrtr: fix a kernel-infoleak in qrtr_recvmsg()
2021-03-30 14:41:42 +02:00
rds
rds: Prevent kernel-infoleak in rds_notify_queue_get()
2020-08-21 11:01:49 +02:00
rfkill
…
rose
rose: Fix Null pointer dereference in rose_send_frame()
2020-12-11 13:37:56 +01:00
rxrpc
rxrpc: Fix handling of an unsupported token type in rxrpc_read()
2021-01-23 15:38:19 +01:00
sched
sch_dsmark: fix a NULL deref in qdisc_reset()
2021-06-03 08:23:33 +02:00
sctp
sctp: fix a SCTP_MIB_CURRESTAB leak in sctp_sf_do_dupcook_b
2021-05-22 10:40:31 +02:00
strparser
…
sunrpc
rpc: fix NULL dereference on kmalloc failure
2021-04-07 12:05:38 +02:00
switchdev
…
tipc
tipc: skb_linearize the head skb when reassembling msgs
2021-06-03 08:23:30 +02:00
unix
skbuff: fix a data race in skb_queue_len()
2020-10-01 20:40:06 +02:00
vmw_vsock
vsock/vmci: log once the failed queue pair allocation
2021-05-22 10:40:28 +02:00
wimax
…
wireless
cfg80211: mitigate A-MSDU aggregation attacks
2021-06-03 08:23:28 +02:00
x25
net/x25: prevent a couple of overflows
2020-12-11 13:37:57 +01:00
xfrm
xfrm: Fix oops in xfrm_replay_advance_bmp
2021-02-03 23:19:51 +01:00
compat.c
net/compat: Add missing sock updates for SCM_RIGHTS
2020-08-21 11:02:08 +02:00
Kconfig
…
Makefile
…
socket.c
net: Set fput_needed iff FDPUT_FPUT is set
2020-08-21 11:02:04 +02:00
sysctl_net.c
…