watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [kworker/1:1:43] Modules linked in: irq event stamp: 10703974 hardirqs last enabled at (10703973): [] ___slab_alloc+0x8e7/0x1ca0 mm/slub.c:4555 hardirqs last disabled at (10703974): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (10703968): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (10703968): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (10703968): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 softirqs last disabled at (10703959): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (10703959): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (10703959): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 43 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:in_irqentry_text kernel/stacktrace.c:380 [inline] RIP: 0010:filter_irq_stacks+0x48/0x90 kernel/stacktrace.c:397 Code: ea 03 80 3c 1a 00 75 4a 48 8b 17 48 81 fa 30 02 00 81 72 16 48 81 fa d0 15 00 81 73 0d 83 c0 01 48 83 c4 10 5b e9 98 e0 b9 05 <48> 81 fa 90 6d 56 87 72 09 48 81 fa ab 6d 56 87 72 e1 83 c0 01 48 RSP: 0018:ffffc900004e69a0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: ffffffff8212fc64 RSI: 0000000000000028 RDI: ffffc900004e6a20 RBP: 0000000000082820 R08: 0000000000000001 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000005939 R12: ffffc900004e6a18 R13: 0000000000002000 R14: ffff888100042280 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc1bfa5180 CR3: 00000000092a8000 CR4: 00000000003506f0 Call Trace: stack_depot_save_flags+0x27/0x9c0 lib/stackdepot.c:659 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kmalloc_node_track_caller_noprof+0x34e/0x9a0 mm/slub.c:5764 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:608 __alloc_skb+0x186/0x410 net/core/skbuff.c:690 __netdev_alloc_skb+0x7a/0x8f0 net/core/skbuff.c:754 netdev_alloc_skb include/linux/skbuff.h:3484 [inline] dev_alloc_skb include/linux/skbuff.h:3497 [inline] ath6kl_usb_post_recv_transfers.constprop.0+0x55/0x3d0 drivers/net/wireless/ath/ath6kl/usb.c:428 ath6kl_usb_start_recv_pipes drivers/net/wireless/ath/ath6kl/usb.c:498 [inline] hif_start drivers/net/wireless/ath/ath6kl/usb.c:703 [inline] ath6kl_usb_power_on+0x8e/0x160 drivers/net/wireless/ath/ath6kl/usb.c:1062 ath6kl_hif_power_on drivers/net/wireless/ath/ath6kl/hif-ops.h:136 [inline] ath6kl_core_init+0x173/0x11b0 drivers/net/wireless/ath/ath6kl/core.c:97 ath6kl_usb_probe+0xcd0/0x13e0 drivers/net/wireless/ath/ath6kl/usb.c:1168 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3421 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:__asan_memcpy+0x27/0x60 mm/kasan/shadow.c:106 Code: 90 90 90 f3 0f 1e fa 41 54 49 89 fc 55 48 89 f5 53 48 89 d3 48 8b 4c 24 18 31 d2 48 89 de 48 89 ef e8 ed f1 ff ff 84 c0 74 2b <48> 8b 4c 24 18 ba 01 00 00 00 48 89 de 4c 89 e7 e8 d4 f1 ff ff 84 RSP: 0018:ffffc9000009ecb8 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000058 RCX: ffffffff8191961d RDX: 0000000000000001 RSI: 0000000000000058 RDI: ffffffff89403698 RBP: ffffffff89403698 R08: 0000000000000000 R09: fffffbfff12806dd R10: ffffffff894036ef R11: 0000000000066488 R12: ffffc9000009ef48 R13: 0000000000002551 R14: ffffc9000009eda8 R15: ffffffff893e6240 FS: 0000000000000000(0000) GS:ffff88826896a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f29fe4ff8 CR3: 0000000124cc6000 CR4: 00000000003506f0 Call Trace: prb_read kernel/printk/printk_ringbuffer.c:1990 [inline] _prb_read_valid+0x25d/0x880 kernel/printk/printk_ringbuffer.c:2170 prb_read_valid+0x78/0xa0 kernel/printk/printk_ringbuffer.c:2242 printk_get_next_message+0x15b/0x6c0 kernel/printk/printk.c:2999 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record+0x67c/0xe50 kernel/printk/printk.c:3215 console_flush_all kernel/printk/printk.c:3289 [inline] __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3359 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426 dev_vprintk_emit+0x394/0x3e0 drivers/base/core.c:4914 dev_printk_emit+0xd2/0x10d drivers/base/core.c:4925 __dev_printk+0xcb/0x100 drivers/base/core.c:4937 _dev_notice+0xef/0x130 drivers/base/core.c:4982 usb_parse_endpoint drivers/usb/core/config.c:503 [inline] usb_parse_interface drivers/usb/core/config.c:636 [inline] usb_parse_configuration drivers/usb/core/config.c:849 [inline] usb_get_configuration.cold+0x26e/0x1796 drivers/usb/core/config.c:998 usb_enumerate_device drivers/usb/core/hub.c:2527 [inline] usb_new_device+0x580/0x7d0 drivers/usb/core/hub.c:2665 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3421 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246