rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=fb9/1/0x4000000000000000 softirq=12630/12630 fqs=0 
	(detected by 0, t=10502 jiffies, g=15821, q=717)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3029 Comm: udevd Not tainted 5.15.168-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:lock_release+0x205/0x9a0 kernel/locking/lockdep.c:5643
Code: 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 48 42 0f b6 04 38 84 c0 0f 85 60 05 00 00 41 8b 06 85 c0 0f 84 4d 02 00 00 4c 89 34 24 <48> 89 54 24 10 48 89 5c 24 28 4c 89 64 24 08 48 89 44 24 38 8d 58
RSP: 0018:ffffc90000dd0b60 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000046 RCX: ffffc90000dd0b03
RDX: 1ffff920001ba17c RSI: ffffffff8a8b3880 RDI: ffffffff8ad90280
RBP: ffffc90000dd0ca0 R08: dffffc0000000000 R09: fffffbfff1bd2cbe
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba178
R13: ffff88807db23b80 R14: ffff88807db24668 R15: dffffc0000000000
FS:  00007f254e13bc80(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad7218fa8c CR3: 000000001f538000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:403 [inline]
 advance_sched+0x68b/0x940 net/sched/sch_taprio.c:765
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:mempolicy_slab_node+0x1/0x320 mm/mempolicy.c:1819
Code: e9 80 e1 07 fe c1 38 c1 0f 8c c2 fe ff ff 48 89 ef e8 03 08 03 00 e9 b5 fe ff ff e8 49 3e b9 ff 0f 0b e8 42 3e b9 ff 0f 0b 55 <41> 57 41 56 41 54 53 50 e8 32 3e b9 ff 65 8b 2d 5b 27 3c 7e 65 8b
RSP: 0018:ffffc90002c17c00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807db23b80 RCX: ffffffff96869f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a80 RDI: ffffffff8ad90280
RBP: ffffffff81c95b2e R08: ffffffff8186f1b0 R09: fffffbfff1bd2cbe
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807db24ea8
R13: 0000000000000297 R14: ffffffff7fff0000 R15: ffff8880171ea500
 get_any_partial mm/slub.c:2194 [inline]
 get_partial mm/slub.c:2236 [inline]
 ___slab_alloc+0x4d7/0xe10 mm/slub.c:3003
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 do_sys_openat2+0xd2/0x4f0 fs/open.c:1247
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f254e2669a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc167f0a10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055fd297d41af RCX: 00007f254e2669a4
RDX: 0000000000080141 RSI: 000055fd297d40d8 RDI: 00000000ffffff9c
RBP: 000055fd297d40d8 R08: 00000000ffffffff R09: 0000000000000000
R10: 00000000000001a4 R11: 0000000000000246 R12: 0000000000080141
R13: ffffffffffffffff R14: 00000000ffffffff R15: 00000000ffffffff
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g15821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4500
rcu: rcu_preempt kthread starved for 10502 jiffies! g15821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27064 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3029 Comm: udevd Not tainted 5.15.168-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:lock_is_held_type+0x118/0x180 kernel/locking/lockdep.c:5668
Code: 00 00 00 48 c7 c7 20 3d 8b 8a e8 83 11 00 00 b8 ff ff ff ff 65 0f c1 05 e6 26 ce 75 83 f8 01 75 40 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb
RSP: 0018:ffffc90000dd0d10 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff88807db23b80
RDX: ffff88807db23b80 RSI: ffffffff8a8b3d20 RDI: ffffffff8ad90280
RBP: 0000000000000001 R08: ffffffff816f76cb R09: ffff888076ec3b40
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046
R13: ffff88807db23b80 R14: 00000000ffffffff R15: ffff8880b912a218
FS:  00007f254e13bc80(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad7218fa8c CR3: 000000001f538000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_is_held include/linux/lockdep.h:287 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1654 [inline]
 __hrtimer_run_queues+0x2f1/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:mempolicy_slab_node+0x1/0x320 mm/mempolicy.c:1819
Code: e9 80 e1 07 fe c1 38 c1 0f 8c c2 fe ff ff 48 89 ef e8 03 08 03 00 e9 b5 fe ff ff e8 49 3e b9 ff 0f 0b e8 42 3e b9 ff 0f 0b 55 <41> 57 41 56 41 54 53 50 e8 32 3e b9 ff 65 8b 2d 5b 27 3c 7e 65 8b
RSP: 0018:ffffc90002c17c00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807db23b80 RCX: ffffffff96869f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a80 RDI: ffffffff8ad90280
RBP: ffffffff81c95b2e R08: ffffffff8186f1b0 R09: fffffbfff1bd2cbe
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807db24ea8
R13: 0000000000000297 R14: ffffffff7fff0000 R15: ffff8880171ea500
 get_any_partial mm/slub.c:2194 [inline]
 get_partial mm/slub.c:2236 [inline]
 ___slab_alloc+0x4d7/0xe10 mm/slub.c:3003
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 do_sys_openat2+0xd2/0x4f0 fs/open.c:1247
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f254e2669a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc167f0a10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055fd297d41af RCX: 00007f254e2669a4
RDX: 0000000000080141 RSI: 000055fd297d40d8 RDI: 00000000ffffff9c
RBP: 000055fd297d40d8 R08: 00000000ffffffff R09: 0000000000000000
R10: 00000000000001a4 R11: 0000000000000246 R12: 0000000000080141
R13: ffffffffffffffff R14: 00000000ffffffff R15: 00000000ffffffff
 </TASK>