===================================================== BUG: KMSAN: uninit-value in expire_timers+0x6cc/0x780 kernel/time/timer.c:1442 CPU: 0 PID: 1284 Comm: kworker/u4:9 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 expire_timers+0x6cc/0x780 kernel/time/timer.c:1442 __run_timers+0xaf4/0xd30 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __do_softirq+0x2ea/0x7f5 kernel/softirq.c:293 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:23 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] do_softirq_own_stack+0x7c/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:390 [inline] __irq_exit_rcu+0x226/0x270 kernel/softirq.c:420 irq_exit_rcu+0xe/0x10 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x107/0x130 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:kmsan_get_shadow_origin_ptr+0x6/0xb0 mm/kmsan/kmsan_shadow.c:137 Code: 77 10 00 75 10 48 8b 45 b8 c6 80 d0 09 00 00 01 e9 62 fe ff ff 48 c7 c7 a8 a4 df 91 31 c0 e8 4a e9 2f ff cc 55 48 89 e5 41 57 <41> 56 53 41 89 d7 48 89 f1 49 89 fe 48 81 fe 01 10 00 00 73 6b 80 RSP: 0018:ffff8881261b3258 EFLAGS: 00000203 RAX: ffff8881259b3768 RBX: 00427b3a8f1c3d98 RCX: 0000000125db3768 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881261b3768 RBP: ffff8881261b3260 R08: ffffea000000000f R09: ffff88812fffa000 R10: 0000000000000009 R11: 00000000ffffffff R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __msan_metadata_ptr_for_store_8+0x13/0x20 mm/kmsan/kmsan_instr.c:55 fdifference lib/crypto/curve25519-hacl64.c:373 [inline] addanddouble_fmonty lib/crypto/curve25519-hacl64.c:504 [inline] ladder_smallloop_cmult_small_loop_step lib/crypto/curve25519-hacl64.c:552 [inline] ladder_smallloop_cmult_small_loop_double_step lib/crypto/curve25519-hacl64.c:562 [inline] ladder_smallloop_cmult_small_loop lib/crypto/curve25519-hacl64.c:572 [inline] ladder_bigloop_cmult_big_loop lib/crypto/curve25519-hacl64.c:585 [inline] ladder_cmult lib/crypto/curve25519-hacl64.c:599 [inline] curve25519_generic+0x1923/0x24290 lib/crypto/curve25519-hacl64.c:781 curve25519 include/crypto/curve25519.h:39 [inline] mix_dh drivers/net/wireguard/noise.c:381 [inline] wg_noise_handshake_create_initiation+0xae2/0x1540 drivers/net/wireguard/noise.c:520 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline] wg_packet_handshake_send_worker+0x1ff/0x420 drivers/net/wireguard/send.c:51 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415 kthread+0x551/0x590 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2839 [inline] slab_alloc mm/slub.c:2848 [inline] __kmalloc_track_caller+0xbe8/0xe10 mm/slub.c:4447 kmemdup+0x95/0x140 mm/util.c:127 __addrconf_sysctl_register+0xe1/0x7f0 net/ipv6/addrconf.c:6882 addrconf_sysctl_register+0x31d/0x3e0 net/ipv6/addrconf.c:6947 ipv6_add_dev+0x1403/0x1c50 net/ipv6/addrconf.c:443 addrconf_notify+0xcc7/0x6400 net/ipv6/addrconf.c:3462 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x123/0x290 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:2027 [inline] call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers net/core/dev.c:2053 [inline] register_netdevice+0x3120/0x37d0 net/core/dev.c:9545 veth_newlink+0x1285/0x15c0 drivers/net/veth.c:1393 __rtnl_newlink net/core/rtnetlink.c:3339 [inline] rtnl_newlink+0x2e03/0x3ed0 net/core/rtnetlink.c:3397 rtnetlink_rcv_msg+0x142b/0x18c0 net/core/rtnetlink.c:5460 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2469 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5478 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] __sys_sendto+0x9f8/0xca0 net/socket.c:1995 __do_sys_sendto net/socket.c:2007 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2003 __x64_sys_sendto+0x6e/0x90 net/socket.c:2003 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================