S       syz.7.300  7778       396.699749   E         398.009331           1.400000         4.594313        27     120         0.000000         0.000000         0.000000   0      0        /syz7
 R         fido_id  7784     68501.202535   N       68501.313506           1.400000        35.857759        42     120         0.000000         0.000000         0.000000   0      0        /
 R       syz.6.305  7790       352.602461   E         353.142803           1.400000         0.899949         2     120         0.000000         0.000000         0.000000   0      0        /syz6
INFO: lockdep is turned off.
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5861/1:b..l
rcu: 	(detected by 1, t=10651 jiffies, g=33585, q=155 ncpus=2)
task:udevd           state:R  running task     stack:25608 pid:5861  tgid:5861  ppid:5227   task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0xec3/0x2390 arch/x86/kernel/unwind_orc.c:614
Code: 00 74 08 4c 89 ef e8 2c 45 b0 00 4d 89 66 50 49 8d 7e 58 48 89 f8 48 c1 e8 03 80 3c 28 00 4c 8b 7c 24 28 74 05 e8 0d 45 b0 00 <49> c7 46 58 00 00 00 00 49 8d 5e 36 48 89 d8 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc900031e72f8 EFLAGS: 00000246
RAX: 1ffff9200063ce84 RBX: 00007ffc34c8b8a0 RCX: 1ffff9200063ce01
RDX: ffffc900031e73d8 RSI: 0000000000000003 RDI: ffffc900031e7420
RBP: dffffc0000000000 R08: 0000000000000022 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff81ac3760 R12: ffffc900031e7f58
R13: ffffc900031e7418 R14: ffffc900031e73c8 R15: 1ffffffff2054feb
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4236
 anon_vma_alloc mm/rmap.c:94 [inline]
 anon_vma_fork+0xde/0x500 mm/rmap.c:360
 dup_mmap+0x9eb/0x1ac0 mm/mmap.c:1797
 dup_mm kernel/fork.c:1485 [inline]
 copy_mm+0x13c/0x4b0 kernel/fork.c:1537
 copy_process+0x1706/0x3c00 kernel/fork.c:2175
 kernel_clone+0x21e/0x840 kernel/fork.c:2605
 __do_sys_clone kernel/fork.c:2748 [inline]
 __se_sys_clone kernel/fork.c:2732 [inline]
 __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2732
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb969cf1636
RSP: 002b:00007ffc34c8b8a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc34c8b8a8 RCX: 00007fb969cf1636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 000055fff89a01b0 R08: 0000000000000000 R09: 000055ffde208140
R10: 00007fb96a39cb50 R11: 0000000000000246 R12: 000055fff89d9280
R13: 0000000000000000 R14: 0000000000000000 R15: 000055ffde1ed4be
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10656 jiffies! g33585 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=13578
rcu: rcu_preempt kthread starved for 10710 jiffies! g33585 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 139 Comm: kworker/u8:5 Not tainted 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 1b 56 4b f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 93 fe 13 f6 65 8b 05 0c 52 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90000a08900 EFLAGS: 00000206
RAX: 50f6633a0a342600 RBX: 0000000000000212 RCX: 50f6633a0a342600
RDX: 0000000000000000 RSI: ffffffff8be334e0 RDI: 0000000000000001
RBP: ffffc90000a08990 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: dffffc0000000000
R13: 000000000000cff8 R14: ffff888144b08000 R15: 1ffff92000141120
FS:  0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f957af716c0 CR3: 00000000781ab000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 dummy_timer+0x441f/0x4550 drivers/usb/gadget/udc/dummy_hcd.c:-1
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kasan_save_alloc_info+0x17/0x50 mm/kasan/generic.c:556
Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 41 56 53 49 89 f6 48 63 87 bc 00 00 00 48 85 c0 0f 94 c1 <49> 01 c6 0f 94 c0 08 c8 74 09 5b 41 5e e9 22 35 ed fe cc 89 d3 ba
RSP: 0018:ffffc90002e578a8 EFLAGS: 00000206
RAX: 00000000000000f0 RBX: ffff888033276500 RCX: 0000000000000000
RDX: 0000000000000820 RSI: ffff888033276500 RDI: ffff8881416d58c0
RBP: 0000000000000820 R08: ffffffff8fa38137 R09: ffffed100664eca0
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 00000000000000f0
R13: ffff888033276500 R14: ffff888033276500 R15: 0000000000000001
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4281
 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:659
 alloc_skb include/linux/skbuff.h:1336 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:763 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
 nsim_dev_trap_report_work+0x29a/0xb80 drivers/net/netdevsim/dev.c:866
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>