------------[ cut here ]------------ WARNING: CPU: 1 PID: 267 at kernel/signal.c:2050 posixtimer_send_sigqueue+0x7ac/0xa40 Modules linked in: CPU: 1 UID: 0 PID: 267 Comm: kworker/u8:5 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: netns cleanup_net pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : posixtimer_send_sigqueue+0x7ac/0xa40 lr : posixtimer_send_sigqueue+0x2dc/0xa40 kernel/signal.c:2005 sp : ffff800080017b60 x29: ffff800080017c00 x28: dfff800000000000 x27: ffff800080017bc0 x26: ffff0000cf4325b8 x25: ffff0000cf432660 x24: ffff0000cf4325a0 x23: ffff0000f08d0000 x22: ffff0000cf432644 x21: 1fffe00019e864c8 x20: ffff0000cf432678 x19: 1fffe00019e864b7 x18: 1ffff000137dee3e x17: ffff800123e96000 x16: ffff800083276af4 x15: ffff700010002f44 x14: 1ffff00011f420ca x13: dfff800000000000 x12: 000000000d8a31c8 x11: 00000000bbc4f364 x10: 0000000000ff0100 x9 : c70309479fa62300 x8 : ffff0000d10e7388 x7 : ffff80008032fa2c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000002000 x0 : 0000000000000001 Call trace: posixtimer_send_sigqueue+0x7ac/0xa40 (P) posix_timer_queue_signal kernel/time/posix-timers.c:308 [inline] posix_timer_fn+0xe4/0x16c kernel/time/posix-timers.c:323 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x47c/0xca4 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x2bc/0xb58 kernel/time/hrtimer.c:1865 timer_handler drivers/clocksource/arm_arch_timer.c:674 [inline] arch_timer_handler_virt+0x74/0x88 drivers/clocksource/arm_arch_timer.c:685 handle_percpu_devid_irq+0x174/0x308 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq_desc kernel/irq/irqdesc.c:714 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:770 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:865 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:916 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:960 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:310 __el1_irq arch/arm64/kernel/entry-common.c:560 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:575 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 kernfs_drain+0x478/0x5d0 fs/kernfs/dir.c:517 (P) __kernfs_remove+0x3d4/0x7b0 fs/kernfs/dir.c:1486 kernfs_remove_by_name_ns+0xe4/0x188 fs/kernfs/dir.c:1694 kernfs_remove_by_name include/linux/kernfs.h:625 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x29c fs/sysfs/group.c:322 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:346 device_remove_groups drivers/base/core.c:2819 [inline] device_remove_attrs+0x1a0/0x250 drivers/base/core.c:2949 device_del+0x478/0x828 drivers/base/core.c:3853 netdev_unregister_kobject+0x150/0x208 net/core/net-sysfs.c:2111 unregister_netdevice_many_notify+0x15fc/0x1c6c net/core/dev.c:11581 unregister_netdevice_many+0x28/0x38 net/core/dev.c:11609 cleanup_net+0x5c8/0xa34 net/core/net_namespace.c:643 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 1645070 hardirqs last enabled at (1645069): [] __call_rcu_common kernel/rcu/tree.c:3108 [inline] hardirqs last enabled at (1645069): [] call_rcu+0x640/0xb00 kernel/rcu/tree.c:3190 hardirqs last disabled at (1645070): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (1645070): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (1644862): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (1644862): [] netif_addr_unlock_bh include/linux/netdevice.h:4608 [inline] softirqs last enabled at (1644862): [] dev_mc_flush+0x1b4/0x1f8 net/core/dev_addr_lists.c:1036 softirqs last disabled at (1644860): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---