------------[ cut here ]------------ WARNING: CPU: 0 PID: 8 at kernel/rcu/tree_stall.h:990 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:990 Modules linked in: CPU: 0 PID: 8 Comm: kworker/0:1 Not tainted 6.9.0-rc5-syzkaller-00104-ga160e1202ca3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:990 Code: 88 61 01 00 00 be 04 00 00 00 48 c7 c7 a0 9a 35 8d e8 f0 ee 69 00 b8 01 00 00 00 87 05 95 cf fa 0b 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 81 fd 00 f5 4b 88 48 c7 c3 98 de 9a 89 74 5a 48 b8 00 RSP: 0018:ffffc90000007df0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff813acb00 RDX: fffffbfff1a6b354 RSI: 0000000000000004 RDI: ffffffff8d359aa0 RBP: ffffffff884bf500 R08: 0000000000000001 R09: fffffbfff1a6b354 R10: 0000000000000003 R11: 0000000000000007 R12: 1ffffffff1041e40 R13: 0000000000000246 R14: ffffffff884bf500 R15: ffff8881f643e652 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fafba3faaf0 CR3: 000000000829e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_check_gp_start_stall kernel/rcu/tree_stall.h:953 [inline] rcu_core+0x4f2/0x16b0 kernel/rcu/tree.c:2466 __do_softirq+0x208/0x905 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xaa/0x110 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 26 3c a1 fa 48 89 df e8 7e b8 a1 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 55 2b 96 fa 65 8b 05 86 db 73 79 85 c0 74 16 5b RSP: 0018:ffffc9000008edf8 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff8881000409c0 RCX: 1ffffffff19515cc RDX: 0000000000000000 RSI: ffffffff86c7cf20 RDI: ffffffff86e75520 RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff194f3a9 R10: ffffffff8ca79d4f R11: 0000000000000007 R12: 0000000000000000 R13: ffffea0004850610 R14: 0000000000000000 R15: ffffea000429ee10 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __put_partials+0x13a/0x170 mm/slub.c:2899 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x131/0x2e0 mm/slub.c:3852 skb_clone+0x190/0x3f0 net/core/skbuff.c:2063 do_one_broadcast net/netlink/af_netlink.c:1466 [inline] netlink_broadcast_filtered+0xb17/0xf10 net/netlink/af_netlink.c:1544 netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1568 uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xc28/0x1810 lib/kobject_uevent.c:593 driver_bound+0x164/0x230 drivers/base/dd.c:420 really_probe+0x62b/0xa90 drivers/base/dd.c:706 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:798 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:828 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:956 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:532 device_add+0x1188/0x1ab0 drivers/base/core.c:3720 usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:254 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:294 call_driver_probe drivers/base/dd.c:578 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:656 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:798 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:828 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:956 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:457 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1028 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:532 device_add+0x1188/0x1ab0 drivers/base/core.c:3720 usb_new_device+0xd90/0x1a10 drivers/usb/core/hub.c:2652 hub_port_connect drivers/usb/core/hub.c:5521 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x2e66/0x4f50 drivers/usb/core/hub.c:5903 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ---------------- Code disassembly (best guess): 0: f5 cmc 1: 53 push %rbx 2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 7: 48 89 fb mov %rdi,%rbx a: 48 83 c7 18 add $0x18,%rdi e: e8 26 3c a1 fa call 0xfaa13c39 13: 48 89 df mov %rbx,%rdi 16: e8 7e b8 a1 fa call 0xfaa1b899 1b: f7 c5 00 02 00 00 test $0x200,%ebp 21: 75 23 jne 0x46 23: 9c pushf 24: 58 pop %rax 25: f6 c4 02 test $0x2,%ah 28: 75 37 jne 0x61 * 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2f: e8 55 2b 96 fa call 0xfa962b89 34: 65 8b 05 86 db 73 79 mov %gs:0x7973db86(%rip),%eax # 0x7973dbc1 3b: 85 c0 test %eax,%eax 3d: 74 16 je 0x55 3f: 5b pop %rbx