INFO: task syz.4.20:5214 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.20 state:D stack:27760 pid: 5214 ppid: 4958 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165 filemap_invalidate_lock include/linux/fs.h:832 [inline] blk_ioctl_zeroout block/ioctl.c:183 [inline] blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 blkdev_ioctl+0x291/0x700 block/ioctl.c:598 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fd84c5543b9 RSP: 002b:00007fd84b7c2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd84c759fa0 RCX: 00007fd84c5543b9 RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007fd84c5df9d4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd84c759fa0 R15: 00007fffec4697e8 INFO: task syz.2.18:5219 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack:27824 pid: 5219 ppid: 4950 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165 filemap_invalidate_lock include/linux/fs.h:832 [inline] blk_ioctl_zeroout block/ioctl.c:183 [inline] blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 blkdev_ioctl+0x291/0x700 block/ioctl.c:598 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f954ebd23b9 RSP: 002b:00007f954de40028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f954edd7fa0 RCX: 00007f954ebd23b9 RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007f954ec5d9d4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f954edd7fa0 R15: 00007ffc272471f8 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/1:2/1108: #0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc900046c7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 #2: ffff88805b17f240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x26a/0x33e0 drivers/net/netdevsim/fib.c:1480 3 locks held by kworker/1:3/3575: #0: ffff88802b3d7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc90002f0fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 #2: ffffffff8c926778 (pool_lock){..-.}-{2:2}, at: free_obj_work+0xea/0x5a0 lib/debugobjects.c:297 2 locks held by getty/3945: #0: ffff88802c41d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158 2 locks held by kworker/1:7/4276: #0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc900030cfd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 3 locks held by kworker/0:13/4327: #0: ffff88802b3d7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc900032ffd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 #2: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xca/0x1540 net/ipv6/addrconf.c:4110 1 lock held by syz.0.16/5194: 1 lock held by syz.4.20/5214: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.2.18/5219: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.5.21/5749: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.7.23/5773: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.6.22/5778: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.8.24/5783: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.9.25/5785: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.3.26/5806: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.0.27/5853: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.1.28/5855: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.2.29/5868: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.4.30/5877: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.5.31/5890: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.7.32/5941: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.6.33/5949: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.8.34/5978: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.9.35/5984: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.3.36/5990: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.0.37/6005: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.1.38/6020: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.2.39/6048: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.4.40/6079: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.5.41/6087: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 3 locks held by syz-executor/6097: #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681 #1: ffff88804969d3e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x223/0x420 drivers/net/wireguard/device.c:49 #2: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #2: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845 1 lock held by syz-executor/6121: #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681 1 lock held by syz.7.42/6124: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz.6.43/6129: #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline] #0: ffff88801709f338 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487 1 lock held by syz-executor/6134: #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d43cb48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe0f/0xe50 kernel/hung_task.c:369 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5076 Comm: kworker/0:16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:fib6_walk_continue+0x1c0/0x8c0 net/ipv6/ip6_fib.c:2107 Code: 08 48 89 df e8 d1 f6 1b f9 48 89 2b e9 e9 04 00 00 e8 e4 ea d6 f8 48 8b 5c 24 28 e9 82 02 00 00 e8 d5 ea d6 f8 e9 85 01 00 00 cb ea d6 f8 48 8b 44 24 38 42 80 3c 30 00 48 8b 5c 24 40 74 08 RSP: 0018:ffffc9000342f7d0 EFLAGS: 00000297 RAX: 0000000000000005 RBX: 0000000000000003 RCX: 0000000000000005 RDX: ffffffff88a235a4 RSI: ffffffff8d53aa80 RDI: 0000000000000003 RBP: ffff88801e5f9c00 R08: ffff88801da45940 R09: 0000000000000005 R10: 0000000000000004 R11: 0000000000000000 R12: ffff88801e5f9c00 R13: ffffc9000342f948 R14: dffffc0000000000 R15: ffffc9000342f950 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f279bde4e9c CR3: 000000007d6e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2163 fib6_clean_tree net/ipv6/ip6_fib.c:2243 [inline] __fib6_clean_all+0x25f/0x3c0 net/ipv6/ip6_fib.c:2259 rt_genid_bump_ipv6 include/net/net_namespace.h:473 [inline] addrconf_dad_completed+0x744/0xc80 net/ipv6/addrconf.c:4289 addrconf_dad_work+0xc8c/0x1540 net/ipv6/addrconf.c:-1 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287