rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5325 0-.... } 3712 jiffies s: 3385 root: 0x1/T rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1187 Comm: kworker/0:3 Not tainted 6.11.0-rc1-syzkaller-00154-gc0ecd6388360 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:58 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline] RIP: 0010:deref_stack_reg+0x98/0x260 arch/x86/kernel/unwind_orc.c:403 Code: 00 74 08 48 89 ef e8 17 6b b9 00 48 89 6c 24 08 4c 8b 7b 10 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 06 <84> c0 0f 85 77 01 00 00 8b 2b 31 ff 89 ee e8 65 35 52 00 85 ed 48 RSP: 0018:ffffc900000065c8 EFLAGS: 00000802 RAX: 0000000000000000 RBX: ffffc90000006700 RCX: ffff888022f00000 RDX: 0000000000010104 RSI: ffffc900000078f0 RDI: ffffc90000006700 RBP: ffffc90000006710 R08: 0000000000000005 R09: ffffffff814120bf R10: 0000000000000003 R11: ffff888022f00000 R12: 1ffff92000000ce1 R13: 1ffff92000000ce2 R14: 1ffff92000000ce0 R15: ffffc90000008000 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30c5ffff CR3: 0000000023522000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x1ab8/0x2a00 arch/x86/kernel/unwind_orc.c:648 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 mm/slub.c:4594 dummy_timer+0x7ce/0x45a0 drivers/usb/gadget/udc/dummy_hcd.c:1981 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:211 [inline] RIP: 0010:unwind_next_frame+0x233/0x2a00 arch/x86/kernel/unwind_orc.c:494 Code: 00 00 00 81 48 29 c5 48 c1 ed 08 48 c7 c0 e4 40 44 91 48 c7 c1 e8 40 70 91 48 29 c1 48 c1 e9 02 45 31 ed 80 3d 6d 26 e8 0c 00 <44> 0f 45 e9 41 8d 5d ff 89 df 89 ee e8 9c 5e 52 00 39 eb 0f 86 02 RSP: 0018:ffffc900000071c8 EFLAGS: 00000202 RAX: ffffffff914440e4 RBX: ffffffff81000000 RCX: 00000000000b0001 RDX: ffffc900000072d5 RSI: ffffffff8c000000 RDI: ffffffff815ee82c RBP: 0000000000005ee8 R08: ffffffff8141093f R09: ffffc90000007390 R10: 0000000000000003 R11: ffffffff817f0ca0 R12: ffffc900000072a0 R13: 0000000000000000 R14: ffffffff8c000000 R15: ffffffff815ee82d arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] ref_tracker_alloc+0x14b/0x490 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline] netdev_hold include/linux/netdevice.h:4076 [inline] dst_init+0xee/0x490 net/core/dst.c:52 dst_alloc+0x14f/0x190 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x77/0x420 net/ipv6/route.c:3275 ndisc_send_skb+0x32a/0x1380 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x36e/0x660 net/ipv6/addrconf.c:4040 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:175 [inline] RIP: 0010:write_comp_data kernel/kcov.c:236 [inline] RIP: 0010:__sanitizer_cov_trace_cmp8+0x2f/0x90 kernel/kcov.c:284 Code: 8b 04 24 65 48 8b 0c 25 40 d7 03 00 65 8b 05 60 6e 70 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 1c 16 00 00 00 74 4e <8b> 81 f8 15 00 00 83 f8 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc RSP: 0018:ffffc900044367a0 EFLAGS: 00000246 RAX: 0000000080000001 RBX: ffffffff9024b838 RCX: ffff888022f00000 RDX: 0000000000000000 RSI: ffffffff81005689 RDI: ffffffff810056a0 RBP: ffffffff810056a0 R08: ffffffff81410c60 R09: ffffc90004436970 R10: 0000000000000003 R11: ffffffff817f0ca0 R12: ffffffff9024b844 R13: ffffffff9024b830 R14: ffffffff81005689 R15: ffffffff9024b82c __orc_find arch/x86/kernel/unwind_orc.c:102 [inline] orc_find arch/x86/kernel/unwind_orc.c:227 [inline] unwind_next_frame+0x510/0x2a00 arch/x86/kernel/unwind_orc.c:494 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] input_allocate_device+0x4e/0x2a0 drivers/input/input.c:1978 rc_allocate_device+0x8e/0x2e0 drivers/media/rc/rc-main.c:1709 imon_init_rdev drivers/media/rc/imon.c:1963 [inline] imon_init_intf0 drivers/media/rc/imon.c:2277 [inline] imon_probe+0x19ce/0x31b0 drivers/media/rc/imon.c:2434 usb_probe_interface+0x645/0xbb0 drivers/usb/core/driver.c:399 really_probe+0x2b8/0xad0 drivers/base/dd.c:657 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:799 driver_probe_device+0x50/0x430 drivers/base/dd.c:829 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:957 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:457 __device_attach+0x333/0x520 drivers/base/dd.c:1029 bus_probe_device+0x189/0x260 drivers/base/bus.c:532 device_add+0x856/0xbf0 drivers/base/core.c:3679 usb_set_configuration+0x1976/0x1fb0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:254 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:294 really_probe+0x2b8/0xad0 drivers/base/dd.c:657 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:799 driver_probe_device+0x50/0x430 drivers/base/dd.c:829 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:957 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:457 __device_attach+0x333/0x520 drivers/base/dd.c:1029 bus_probe_device+0x189/0x260 drivers/base/bus.c:532 device_add+0x856/0xbf0 drivers/base/core.c:3679 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2651 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+0x2d6a/0x5150 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244