lo speed is unknown, defaulting to 1000
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BUG: KCSAN: data-race in pfkey_send_acquire / xfrm_probe_algs

write to 0xffffffff86c8d230 of 1 bytes by task 7939 on cpu 1:
 xfrm_probe_algs+0x9f/0x2b0 net/xfrm/xfrm_algo.c:821
 pfkey_register+0xde/0x400 net/key/af_key.c:1701
 pfkey_process net/key/af_key.c:2848 [inline]
 pfkey_sendmsg+0x715/0x900 net/key/af_key.c:3699
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:729
 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2614
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2668
 __sys_sendmsg net/socket.c:2700 [inline]
 __do_sys_sendmsg net/socket.c:2705 [inline]
 __se_sys_sendmsg net/socket.c:2703 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2703
 x64_sys_call+0x191e/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff86c8d230 of 1 bytes by task 7935 on cpu 0:
 count_ah_combs net/key/af_key.c:2910 [inline]
 pfkey_send_acquire+0xf5/0xf90 net/key/af_key.c:3177
 km_query+0x5d/0xc0 net/xfrm/xfrm_state.c:2767
 xfrm_state_find+0x24c7/0x2fa0 net/xfrm/xfrm_state.c:1558
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2522 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2573 [inline]
 xfrm_resolve_and_create_bundle+0x575/0x1f30 net/xfrm/xfrm_policy.c:2871
 xfrm_lookup_with_ifid+0x1da/0x1360 net/xfrm/xfrm_policy.c:3205
 xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline]
 xfrm_lookup_route+0x3a/0x110 net/xfrm/xfrm_policy.c:3347
 ip_route_output_flow+0xf1/0x130 net/ipv4/route.c:2934
 udp_sendmsg+0x11b0/0x13c0 net/ipv4/udp.c:1450
 inet_sendmsg+0xac/0xd0 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x102/0x180 net/socket.c:729
 ____sys_sendmsg+0x345/0x4e0 net/socket.c:2614
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2668
 __sys_sendmmsg+0x178/0x300 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __x64_sys_sendmmsg+0x57/0x70 net/socket.c:2781
 x64_sys_call+0x1c4a/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 7935 Comm: syz.4.1611 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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