===================================================== BUG: KMSAN: uninit-value in expire_timers+0x6cc/0x780 kernel/time/timer.c:1442 CPU: 0 PID: 1359 Comm: kworker/u4:13 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net 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_virt_addr_valid mm/kmsan/kmsan_shadow.c:84 [inline] RIP: 0010:virt_to_page_or_null+0x1d/0xf0 mm/kmsan/kmsan_shadow.c:129 Code: c3 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 89 f8 48 2d 00 00 00 80 0f 83 c3 00 00 00 48 ba 00 00 00 00 80 77 00 00 <48> 01 fa 48 39 c2 77 55 8a 0d 92 44 77 10 48 89 d6 48 d3 ee 48 85 RSP: 0018:ffff8881256bf1f0 EFLAGS: 00000287 RAX: ffff8880d40da478 RBX: ffff8880540da478 RCX: 00000000538da400 RDX: 0000778000000000 RSI: 0000000000000140 RDI: ffff8880540da478 RBP: ffff8881256bf1f0 R08: ffffea000000000f R09: ffff88812fffa000 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880540da4f8 R14: 0000000000000001 R15: 0000000000000000 kmsan_get_metadata+0x116/0x180 mm/kmsan/kmsan_shadow.c:194 kmsan_get_shadow_origin_ptr+0x81/0xb0 mm/kmsan/kmsan_shadow.c:154 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 xlate_dir+0x173/0x700 fs/proc/proc_sysctl.c:1044 xlate_dir+0xbc/0x700 fs/proc/proc_sysctl.c:1041 xlate_dir+0xbc/0x700 fs/proc/proc_sysctl.c:1041 put_links+0x10c/0xa60 fs/proc/proc_sysctl.c:1607 drop_sysctl_table+0x152/0x7e0 fs/proc/proc_sysctl.c:1638 drop_sysctl_table+0x730/0x7e0 fs/proc/proc_sysctl.c:1646 unregister_sysctl_table+0xf9/0x270 fs/proc/proc_sysctl.c:1681 unregister_net_sysctl_table+0x37/0x40 net/sysctl_net.c:127 __devinet_sysctl_unregister net/ipv4/devinet.c:2595 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2623 [inline] inetdev_destroy net/ipv4/devinet.c:324 [inline] inetdev_event+0x15f3/0x2100 net/ipv4/devinet.c:1599 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] rollback_registered_many+0x16ff/0x2820 net/core/dev.c:8968 unregister_netdevice_many net/core/dev.c:10113 [inline] default_device_exit_batch+0x735/0xc50 net/core/dev.c:10596 ops_exit_list net/core/net_namespace.c:189 [inline] cleanup_net+0xf72/0x1b60 net/core/net_namespace.c:603 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 __devinet_sysctl_register+0xe4/0x770 net/ipv4/devinet.c:2560 devinet_sysctl_register+0x344/0x410 net/ipv4/devinet.c:2612 inetdev_init+0x5fb/0xc10 net/ipv4/devinet.c:276 inetdev_event+0xd19/0x2100 net/ipv4/devinet.c:1531 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 macsec_newlink+0x9a2/0x2c50 drivers/net/macsec.c:4050 __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 =====================================================