IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready INFO: task syz-executor.0:5907 blocked for more than 140 seconds. IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 8021q: adding VLAN 0 to HW filter on device batadv0 syz-executor.0 D29920 5907 17967 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready __ia32_sys_sync+0xa/0x10 fs/sync.c:124 IPv6: ADDRCONF(NETDEV_UP): veth1_virt_wifi: link is not ready do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 Bluetooth: hci9: command 0x0409 tx timeout entry_SYSCALL_64_after_hwframe+0x49/0xbe IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready RIP: 0033:0x7f735c97a0c9 Code: Bad RIP value. RSP: 002b:00007f735aeec168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f735ca99f80 RCX: 00007f735c97a0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready RBP: 00007f735c9d5ae9 R08: 0000000000000000 R09: 0000000000000000 IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc28dd907f R14: 00007f735aeec300 R15: 0000000000022000 IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready Showing all locks held in the system: IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready 1 lock held by khungtaskd/1571: IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready #0: 0000000080fb8a04 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready 6 locks held by kworker/1:2/3534: 1 lock held by in:imklog/7811: device veth0_vlan entered promiscuous mode #0: 0000000036680d84 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready 4 locks held by syz-executor.3/1835: device veth1_vlan entered promiscuous mode 1 lock held by syz-executor.0/5907: #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready 3 locks held by kworker/1:0/6223: #0: 000000009180fe7d ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready #1: 000000000b09b175 ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000918979a8 (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready device veth0_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready 1 lock held by syz-executor.2/8382: #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 device veth1_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready 1 lock held by syz-executor.2/8385: #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready 1 lock held by syz-executor.2/8480: #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready 1 lock held by syz-executor.2/8486: #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 1 lock held by syz-executor.2/8488: batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 #0: 0000000004e244b2 (&type->s_umount_key#75){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! 2 locks held by syz-executor.2/8620: ============================================= batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 NMI backtrace for cpu 0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! NMI backtrace for cpu 1 CPU: 1 PID: 8620 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:unwind_next_frame+0xa72/0x1400 arch/x86/kernel/unwind_orc.c:511 Code: 09 00 00 49 8d 7e 58 49 c7 46 50 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5c 09 00 00 <4c> 89 ea 49 c7 46 58 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff8880ba107390 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff11017420e7b RCX: 0000000000000000 RDX: 1ffff11017420ea3 RSI: ffff8880ba107320 RDI: ffff8880ba107518 RBP: 0000000000000002 R08: ffffffff8b99dea4 R09: ffffffff8b99de70 R10: ffff8880ba10751f R11: 0000000000074071 R12: ffff8880ba1077a8 R13: ffff8880ba1074f5 R14: ffff8880ba1074c0 R15: ffffffff8b99dea0 FS: 0000555556bc3400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f58eb93f000 CR3: 000000003a9b6000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 00000000b8fecd19 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0xd6/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333 sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108 mld_newpack+0x1d2/0x760 net/ipv6/mcast.c:1609 add_grhead+0x265/0x330 net/ipv6/mcast.c:1712 add_grec+0xe3c/0x10b0 net/ipv6/mcast.c:1843 mld_send_cr net/ipv6/mcast.c:1969 [inline] mld_ifc_timer_expire+0x5a2/0xdf0 net/ipv6/mcast.c:2476 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1724 [inline] RIP: 0010:vprintk_emit+0x668/0x740 kernel/printk/printk.c:1964 Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 0f 85 d9 00 00 00 48 83 3d 9c a2 a3 08 00 74 37 e8 7d a5 14 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 82 fe ff ff e8 69 a5 14 00 0f 0b e8 62 a5 14 00 RSP: 0018:ffff88803f136c30 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a746c400 RBX: 0000000000000293 RCX: 1ffff11014e8d995 RDX: 0000000000000000 RSI: ffffffff814ddff3 RDI: 0000000000000293 RBP: ffff88803f136c70 R08: ffffffff8cd3d6e8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000056 R13: 1ffffffff13e3051 R14: 0000000000000200 R15: 0000000000000001 vprintk_func+0x79/0x180 kernel/printk/printk_safe.c:405 printk+0xba/0xed kernel/printk/printk.c:2040 batadv_check_known_mac_addr.cold+0x23/0x28 net/batman-adv/hard-interface.c:529 batadv_hard_if_event+0x833/0x15c0 net/batman-adv/hard-interface.c:1065 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1762 [inline] dev_set_mac_address net/core/dev.c:7912 [inline] dev_set_mac_address+0x22f/0x320 net/core/dev.c:7897 do_setlink+0x1633/0x3540 net/core/rtnetlink.c:2404 rtnl_newlink+0xda9/0x15c0 net/core/rtnetlink.c:3077 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899  Lost 20 message(s)!