Eric Dumazet 9b1f19d810 dccp: fool proof ccid_hc_[rt]x_parse_options() ... Similarly to commit 276bdb82de ("dccp: check ccid before dereferencing") it is wise to test for a NULL ccid. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ccid_hc_tx_parse_options net/dccp/ccid.h:205 [inline] RIP: 0010:dccp_parse_options+0x8d9/0x12b0 net/dccp/options.c:233 Code: c5 0f b6 75 b3 80 38 00 0f 85 d6 08 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 4c 8b b8 f8 07 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 95 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b kobject: 'loop5' (0000000080f78fc1): kobject_uevent_env RSP: 0018:ffff8880a94df0b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880858ac723 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000007 RDI: 0000000000000001 RBP: ffff8880a94df140 R08: 0000000000000001 R09: ffff888061b83a80 R10: ffffed100c370752 R11: ffff888061b83a97 R12: 0000000000000026 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0defa33518 CR3: 000000008db5e000 CR4: 00000000001406e0 kobject: 'loop5' (0000000080f78fc1): fill_kobj_path: path = '/devices/virtual/block/loop5' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dccp_rcv_state_process+0x2b6/0x1af6 net/dccp/input.c:654 dccp_v4_do_rcv+0x100/0x190 net/dccp/ipv4.c:688 sk_backlog_rcv include/net/sock.h:936 [inline] __sk_receive_skb+0x3a9/0xea0 net/core/sock.c:473 dccp_v4_rcv+0x10cb/0x1f80 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0xb6/0xa20 net/ipv4/ip_input.c:208 ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_local_deliver+0x1f0/0x740 net/ipv4/ip_input.c:255 dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x1f4/0x2f0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xed/0x620 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x76d/0x1930 net/core/dev.c:6412 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 58a0ba03bea2c376 ]--- RIP: 0010:ccid_hc_tx_parse_options net/dccp/ccid.h:205 [inline] RIP: 0010:dccp_parse_options+0x8d9/0x12b0 net/dccp/options.c:233 Code: c5 0f b6 75 b3 80 38 00 0f 85 d6 08 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 4c 8b b8 f8 07 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 95 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff8880a94df0b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880858ac723 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000007 RDI: 0000000000000001 RBP: ffff8880a94df140 R08: 0000000000000001 R09: ffff888061b83a80 R10: ffffed100c370752 R11: ffff888061b83a97 R12: 0000000000000026 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0defa33518 CR3: 0000000009871000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-02-01 14:49:10 -08:00
..
6lowpan	6lowpan: convert to DEFINE_SHOW_ATTRIBUTE	2018-12-19 00:28:05 +01:00
9p	9p/net: put a lower bound on msize	2018-12-25 17:07:49 +09:00
802
8021q	net: core: dev: Add extack argument to dev_change_flags()	2018-12-06 13:26:07 -08:00
appletalk
atm	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
ax25	ax25: fix possible use-after-free	2019-01-23 11:18:00 -08:00
batman-adv	Here are some batman-adv bugfixes:	2019-02-01 10:19:26 -08:00
bluetooth	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2018-12-27 13:53:32 -08:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-12-10 18:00:43 -08:00
bpfilter	net: bpfilter: change section name of bpfilter UMH blob.	2019-01-16 15:46:46 -08:00
bridge	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf	2019-01-28 10:51:51 -08:00
caif	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
can	can: bcm: check timer values before ktime conversion	2019-01-22 11:33:46 +01:00
ceph	libceph: avoid KEEPALIVE_PENDING races in ceph_con_keepalive()	2019-01-21 14:53:12 +01:00
core	net: set default network namespace in init_dummy_netdev()	2019-01-29 11:29:55 -08:00
dcb
dccp	dccp: fool proof ccid_hc_[rt]x_parse_options()	2019-02-01 14:49:10 -08:00
decnet	decnet: fix DN_IFREQ_SIZE	2019-01-27 23:11:55 -08:00
dns_resolver
dsa	net: dsa: ksz: Add STP multicast handling	2018-12-16 14:23:33 -08:00
ethernet	net: ethernet: provide nvmem_get_mac_address()	2018-12-03 15:40:30 -08:00
hsr
ieee802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-12-24 16:19:56 -08:00
ife
ipv4	net: ip_gre: always reports o_key to userspace	2019-01-30 14:00:02 -08:00
ipv6	ipv6: sr: clear IP6CB(skb) on SRH ip4ip6 encapsulation	2019-01-30 14:06:12 -08:00
iucv	iucv: Remove SKB list assumptions.	2018-11-10 16:55:11 -08:00
kcm
key	af_key: fix indentation on declaration statement	2018-11-15 18:09:32 +01:00
l2tp	l2tp: copy 4 more bytes to linear part if necessary	2019-01-31 08:58:46 -08:00
l3mdev	l3mdev: add function to retreive upper master	2018-12-03 14:15:26 -08:00
lapb
llc	llc: do not use sk_eat_skb()	2018-10-22 19:59:20 -07:00
mac80211	mac80211: ensure that mgmt tx skbs have tailroom for encryption	2019-02-01 11:08:02 +01:00
mac802154
mpls
ncsi	net/ncsi: Add NCSI Mellanox OEM command	2018-11-27 16:37:20 -08:00
netfilter	netfilter: nfnetlink_osf: add missing fmatch check	2019-01-28 11:09:11 +01:00
netlabel
netlink	net: netlink: rename NETLINK_DUMP_STRICT_CHK -> NETLINK_GET_STRICT_CHK	2018-12-14 11:44:31 -08:00
netrom	netrom: switch to sock timer API	2019-01-27 10:38:04 -08:00
nfc	net: Revert recent Spectre-v1 patches.	2018-12-23 16:01:35 -08:00
nsh
openvswitch	openvswitch: Avoid OOB read when parsing flow nlattrs	2019-01-16 13:35:21 -08:00
packet	af_packet: fix raw sockets over 6in4 tunnel	2019-01-17 15:54:45 -08:00
phonet	net: Revert recent Spectre-v1 patches.	2018-12-23 16:01:35 -08:00
psample
qrtr
rds	rds: fix refcount bug in rds_sock_addref	2019-01-31 09:43:27 -08:00
rfkill	rfkill: gpio: Remove unused include	2018-12-18 13:13:56 +01:00
rose	net/rose: fix NULL ax25_cb kernel panic	2019-01-27 10:40:01 -08:00
rxrpc	Revert "rxrpc: Allow failed client calls to be retried"	2019-01-15 21:33:36 -08:00
sched	net/sched: cls_flower: allocate mask dynamically in fl_change()	2019-01-17 14:40:59 -08:00
sctp	sctp: walk the list of asoc safely	2019-02-01 10:41:46 -08:00
smc	net/smc: fix use of variable in cleared area	2019-02-01 14:45:45 -08:00
strparser
sunrpc	SUNRPC: Address Kerberos performance/behavior regression	2019-01-15 15:36:41 -05:00
switchdev	net: switchdev: Add extack to switchdev_handle_port_obj_add() callback	2018-12-12 16:34:22 -08:00
tipc	tipc: fix uninit-value in tipc_nl_compat_doit	2019-01-15 20:29:21 -08:00
tls	net: tls: Fix deadlock in free_resources tx	2019-01-28 23:07:08 -08:00
unix	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
vmw_vsock	VSOCK: Send reset control packet when socket is partially bound	2018-12-18 11:53:42 -08:00
wimax
wireless	cfg80211: call disconnect_wk when AP stops	2019-02-01 11:12:50 +01:00
x25	net/x25: handle call collisions	2018-11-29 14:25:36 -08:00
xdp	xsk: Check if a queue exists during umem setup	2019-01-15 20:51:57 +01:00
xfrm	xfrm: Make set-mark default behavior backward compatible	2019-01-16 13:10:55 +01:00
compat.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
Kconfig	net: convert bridge_nf to use skb extension infrastructure	2018-12-19 11:21:37 -08:00
Makefile
socket.c	net: socket: make bond ioctls go through compat_ifreq_ioctl()	2019-01-30 10:19:31 -08:00
sysctl_net.c