===================================================== BUG: KMSAN: uninit-value in __hlist_del include/linux/list.h:812 [inline] BUG: KMSAN: uninit-value in detach_timer kernel/time/timer.c:814 [inline] BUG: KMSAN: uninit-value in expire_timers+0x38d/0x780 kernel/time/timer.c:1438 CPU: 1 PID: 13946 Comm: syz-executor.2 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 __hlist_del include/linux/list.h:812 [inline] detach_timer kernel/time/timer.c:814 [inline] expire_timers+0x38d/0x780 kernel/time/timer.c:1438 __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_metadata+0x159/0x180 mm/kmsan/kmsan_shadow.c:201 Code: ff 0f 00 00 45 84 f6 48 0f 45 c8 48 b8 00 00 00 00 00 16 00 00 48 01 c8 48 c1 e8 04 48 b9 00 d0 cc cc cc cc cc cc 48 0f af c8 <48> 09 d9 48 b8 00 00 00 00 80 88 ff ff e9 fd fe ff ff 31 c0 5b 41 RSP: 0018:ffff8880867aeae8 EFLAGS: 00000a07 RAX: 0000000000282ac6 RBX: 0000000000000600 RCX: 000000008088e000 RDX: 000000008108e600 RSI: 0000000000000200 RDI: ffff88808108e600 RBP: ffff8880867aeb00 R08: ffffea000000000f R09: ffff88812fffa000 R10: 0000000000000004 R11: ffff888093128000 R12: ffff8880931289d8 R13: ffff88808108e600 R14: 0000000000000000 R15: 0000000000000001 kmsan_get_shadow_origin_ptr+0x6c/0xb0 mm/kmsan/kmsan_shadow.c:149 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 batadv_hardif_get_by_netdev net/batman-adv/hard-interface.c:72 [inline] batadv_hard_if_event+0x3ff/0x3bd0 net/batman-adv/hard-interface.c:1031 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+0x239/0x370 net/core/dev.c:2053 bond_set_dev_addr drivers/net/bonding/bond_main.c:671 [inline] bond_enslave+0xf67/0xa040 drivers/net/bonding/bond_main.c:1552 do_set_master net/core/rtnetlink.c:2476 [inline] do_setlink+0x1cb9/0x7170 net/core/rtnetlink.c:2611 __rtnl_newlink net/core/rtnetlink.c:3272 [inline] rtnl_newlink+0x3225/0x3ed0 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 RIP: 0033:0x416ae3 Code: Bad RIP value. RSP: 002b:000000000169f758 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000016a3700 RCX: 0000000000416ae3 RDX: 0000000000000028 RSI: 00000000016a3750 RDI: 0000000000000003 RBP: 0000000000000000 R08: 000000000169f760 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000016a3750 R15: 0000000000000003 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 =====================================================