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linux/net/ipv6
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Eric Dumazet 18a419bad6 udp: annotate data races around unix_sk(sk)->gso_size 
Accesses to unix_sk(sk)->gso_size are lockless.
Add READ_ONCE()/WRITE_ONCE() around them.

BUG: KCSAN: data-race in udp_lib_setsockopt / udpv6_sendmsg

write to 0xffff88812d78f47c of 2 bytes by task 10849 on cpu 1:
 udp_lib_setsockopt+0x3b3/0x710 net/ipv4/udp.c:2696
 udpv6_setsockopt+0x63/0x90 net/ipv6/udp.c:1630
 sock_common_setsockopt+0x5d/0x70 net/core/sock.c:3265
 __sys_setsockopt+0x18f/0x200 net/socket.c:2104
 __do_sys_setsockopt net/socket.c:2115 [inline]
 __se_sys_setsockopt net/socket.c:2112 [inline]
 __x64_sys_setsockopt+0x62/0x70 net/socket.c:2112
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812d78f47c of 2 bytes by task 10852 on cpu 0:
 udpv6_sendmsg+0x161/0x16b0 net/ipv6/udp.c:1299
 inet6_sendmsg+0x5f/0x80 net/ipv6/af_inet6.c:642
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 ____sys_sendmsg+0x360/0x4d0 net/socket.c:2337
 ___sys_sendmsg net/socket.c:2391 [inline]
 __sys_sendmmsg+0x315/0x4b0 net/socket.c:2477
 __do_sys_sendmmsg net/socket.c:2506 [inline]
 __se_sys_sendmmsg net/socket.c:2503 [inline]
 __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2503
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000 -> 0x0005

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10852 Comm: syz-executor.0 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Fixes: bec1f6f69736 ("udp: generate gso with UDP_SEGMENT")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-01 13:23:19 -07:00
..
ila
net: Add MODULE_DESCRIPTION entries to network modules
2020-06-20 21:33:57 -07:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-06-18 19:47:02 -07:00
addrconf_core.c
ipv6: add ipv6_dev_find to stubs
2021-03-30 13:29:39 -07:00
addrconf.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-06-18 19:47:02 -07:00
addrlabel.c
ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init
2020-11-25 11:20:16 -08:00
af_inet6.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-04-02 11:03:07 -07:00
ah6.c
xfrm: remove hdr_offset indirection
2021-06-11 14:48:50 +02:00
anycast.c
ipv6: fix memory leaks on IPV6_ADDRFORM path
2020-07-30 16:30:55 -07:00
calipso.c
cipso,calipso: resolve a number of problems with the DOI refcounts
2021-03-04 15:26:57 -08:00
datagram.c
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
2020-11-23 18:36:21 -05:00
esp6_offload.c
xfrm: remove description from xfrm_type struct
2021-06-09 09:38:52 +02:00
esp6.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-06-29 15:45:27 -07:00
exthdrs_core.c
ipv6: remove printk
2019-07-27 14:23:48 -07:00
exthdrs_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
exthdrs.c
ipv6: fix out-of-bound access in ip6_parse_tlv()
2021-06-24 12:42:57 -07:00
fib6_notifier.c
net: fib_notifier: propagate extack down to the notifier block callback
2019-10-04 11:10:56 -07:00
fib6_rules.c
ipv6: fib6: remove redundant initialization of variable err
2021-06-14 12:42:26 -07:00
fou6.c
net: Add MODULE_DESCRIPTION entries to network modules
2020-06-20 21:33:57 -07:00
icmp.c
ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages
2021-06-28 14:29:45 -07:00
inet6_connection_sock.c
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
2020-11-23 18:36:21 -05:00
inet6_hashtables.c
net: ipv6: remove unused arg exact_dif in compute_score
2020-08-31 13:08:10 -07:00
ip6_checksum.c
…
ip6_fib.c
ipv6: Add a sysctl to control multipath hash fields
2021-05-18 13:27:32 -07:00
ip6_flowlabel.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-08-05 20:13:21 -07:00
ip6_gre.c
ipv6: remove extra dev_hold() for fallback tunnels
2021-03-31 14:53:11 -07:00
ip6_icmp.c
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
2021-02-23 11:29:52 -08:00
ip6_input.c
ipv6: weaken the v4mapped source check
2021-03-18 11:19:23 -07:00
ip6_offload.c
net/core: move gro function declarations to separate header
2021-02-04 18:37:57 -08:00
ip6_offload.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ip6_output.c
ipv6: delete useless dst check in ip6_dst_lookup_tail
2021-06-24 15:49:01 -07:00
ip6_tunnel.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-06-29 15:45:27 -07:00
ip6_udp_tunnel.c
net: Make locking in sock_bindtoindex optional
2020-06-01 14:57:14 -07:00
ip6_vti.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-04-09 20:48:35 -07:00
ip6mr.c
net/ipv6: switch ip6_mroute_setsockopt to sockptr_t
2020-07-24 15:41:54 -07:00
ipcomp6.c
xfrm: remove hdr_offset indirection
2021-06-11 14:48:50 +02:00
ipv6_sockglue.c
net/ipv6: propagate user pointer annotation
2020-12-01 11:42:33 -08:00
Kconfig
net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC
2020-09-18 17:45:04 -07:00
Makefile
net: ipv6: add rpl sr tunnel
2020-03-29 22:30:57 -07:00
mcast_snoop.c
net: bridge: mcast: fix broken length + header check for MRDv6 Adv.
2021-04-27 14:02:06 -07:00
mcast.c
mld: avoid unnecessary high order page allocation in mld_newpack()
2021-06-14 12:46:00 -07:00
mip6.c
xfrm: ipv6: move mip6_rthdr_offset into xfrm core
2021-06-11 14:48:50 +02:00
ndisc.c
net: allow user to set metric on default route learned via Router Advertisement
2021-01-26 18:39:45 -08:00
netfilter.c
netfilter: Dissect flow after packet mangling
2021-04-18 22:04:16 +02:00
output_core.c
ipv6: use prandom_u32() for ID generation
2021-05-31 22:12:08 -07:00
ping.c
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
2020-11-23 18:36:21 -05:00
proc.c
net: udp: introduce UDP_MIB_MEMERRORS for udp_mem
2020-11-09 15:34:44 -08:00
protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
raw.c
net: sock: introduce sk_error_report
2021-06-29 11:28:21 -07:00
reassembly.c
ipv6: record frag_max_size in atomic fragments in input path
2021-05-21 15:02:25 -07:00
route.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net
2021-06-07 13:01:52 -07:00
rpl_iptunnel.c
net: ipv6: rpl_iptunnel: simplify the return expression of rpl_do_srh()
2020-12-08 16:22:54 -08:00
rpl.c
net: ipv6: rpl*: Fix strange kerneldoc warnings due to bad header
2020-10-30 12:12:52 -07:00
seg6_hmac.c
crypto: sha - split sha.h into sha1.h and sha2.h
2020-11-20 14:45:33 +11:00
seg6_iptunnel.c
seg6_iptunnel: Refactor seg6_lwt_headroom out of uapi header
2020-08-03 17:57:40 -07:00
seg6_local.c
seg6: add support for SRv6 End.DT46 Behavior
2021-06-18 11:35:47 -07:00
seg6.c
net: Remove redundant assignment to err
2021-04-29 15:34:15 -07:00
sit.c
sit: allow redirecting ip6ip, ipip and mplsip packets to eth devices
2021-06-28 12:44:17 -07:00
syncookies.c
selinux/stable-5.11 PR 20201214
2020-12-16 11:01:04 -08:00
sysctl_net_ipv6.c
net: Add notifications when multipath hash field change
2021-05-19 12:47:47 -07:00
tcp_ipv6.c
net: sock: introduce sk_error_report
2021-06-29 11:28:21 -07:00
tcpv6_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tunnel6.c
tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels
2020-07-09 12:52:37 +02:00
udp_impl.h
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
udp_offload.c
udp: properly complete L4 GRO over UDP tunnel packet
2021-03-30 17:06:49 -07:00
udp.c
udp: annotate data races around unix_sk(sk)->gso_size
2021-07-01 13:23:19 -07:00
udplite.c
net/ipv6: remove compat_ipv6_{get,set}sockopt
2020-07-19 18:16:41 -07:00
xfrm6_input.c
xfrm: state: remove extract_input indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm6_output.c
xfrm: remove hdr_offset indirection
2021-06-11 14:48:50 +02:00
xfrm6_policy.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2019-12-24 22:28:54 -08:00
xfrm6_protocol.c
xfrm: add support for UDPv6 encapsulation of ESP
2020-04-28 11:28:36 +02:00
xfrm6_state.c
xfrm: remove output_finish indirection from xfrm_state_afinfo
2020-05-06 09:40:08 +02:00
xfrm6_tunnel.c
xfrm: remove description from xfrm_type struct
2021-06-09 09:38:52 +02:00