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18a419bad6
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:
|
||
|---|---|---|
| .. | ||
| bpfilter | ||
| netfilter | ||
| af_inet.c | ||
| ah4.c | ||
| arp.c | ||
| bpf_tcp_ca.c | ||
| cipso_ipv4.c | ||
| datagram.c | ||
| devinet.c | ||
| esp4.c | ||
| esp4_offload.c | ||
| fib_frontend.c | ||
| fib_lookup.h | ||
| fib_notifier.c | ||
| fib_rules.c | ||
| fib_semantics.c | ||
| fib_trie.c | ||
| fou.c | ||
| gre_demux.c | ||
| gre_offload.c | ||
| icmp.c | ||
| igmp.c | ||
| inet_connection_sock.c | ||
| inet_diag.c | ||
| inet_fragment.c | ||
| inet_hashtables.c | ||
| inet_timewait_sock.c | ||
| inetpeer.c | ||
| ip_forward.c | ||
| ip_fragment.c | ||
| ip_gre.c | ||
| ip_input.c | ||
| ip_options.c | ||
| ip_output.c | ||
| ip_sockglue.c | ||
| ip_tunnel.c | ||
| ip_tunnel_core.c | ||
| ip_vti.c | ||
| ipcomp.c | ||
| ipconfig.c | ||
| ipip.c | ||
| ipmr.c | ||
| ipmr_base.c | ||
| Kconfig | ||
| Makefile | ||
| metrics.c | ||
| netfilter.c | ||
| netlink.c | ||
| nexthop.c | ||
| ping.c | ||
| proc.c | ||
| protocol.c | ||
| raw.c | ||
| raw_diag.c | ||
| route.c | ||
| syncookies.c | ||
| sysctl_net_ipv4.c | ||
| tcp.c | ||
| tcp_bbr.c | ||
| tcp_bic.c | ||
| tcp_bpf.c | ||
| tcp_cdg.c | ||
| tcp_cong.c | ||
| tcp_cubic.c | ||
| tcp_dctcp.c | ||
| tcp_dctcp.h | ||
| tcp_diag.c | ||
| tcp_fastopen.c | ||
| tcp_highspeed.c | ||
| tcp_htcp.c | ||
| tcp_hybla.c | ||
| tcp_illinois.c | ||
| tcp_input.c | ||
| tcp_ipv4.c | ||
| tcp_lp.c | ||
| tcp_metrics.c | ||
| tcp_minisocks.c | ||
| tcp_nv.c | ||
| tcp_offload.c | ||
| tcp_output.c | ||
| tcp_rate.c | ||
| tcp_recovery.c | ||
| tcp_scalable.c | ||
| tcp_timer.c | ||
| tcp_ulp.c | ||
| tcp_vegas.c | ||
| tcp_vegas.h | ||
| tcp_veno.c | ||
| tcp_westwood.c | ||
| tcp_yeah.c | ||
| tunnel4.c | ||
| udp.c | ||
| udp_bpf.c | ||
| udp_diag.c | ||
| udp_impl.h | ||
| udp_offload.c | ||
| udp_tunnel_core.c | ||
| udp_tunnel_nic.c | ||
| udp_tunnel_stub.c | ||
| udplite.c | ||
| xfrm4_input.c | ||
| xfrm4_output.c | ||
| xfrm4_policy.c | ||
| xfrm4_protocol.c | ||
| xfrm4_state.c | ||
| xfrm4_tunnel.c | ||