rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10498 ticks this GP) idle=878c/1/0x4000000000000000 softirq=31100/31102 fqs=5239
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1052446         10            0
rcu: 	cputime:    31882      20607           41   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=35349 q=2853 ncpus=2)
CPU: 0 PID: 9916 Comm: syz.2.1068 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:get_random_u32+0x540/0x910 drivers/char/random.c:522
Code: dc fc 4d 85 f6 75 16 e8 9e 1e dc fc eb 15 e8 97 1e dc fc e8 72 16 da 05 4d 85 f6 74 ea e8 88 1e dc fc fb 8b 84 24 00 01 00 00 <43> c6 44 2f 18 f8 48 c7 44 24 40 0e 36 e0 45 4b c7 04 2f 00 00 00
RSP: 0018:ffffc900000079e0 EFLAGS: 00000246
RAX: 0000000040734fcd RBX: 0000000000000000 RCX: ffff888057ef1e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007b60 R08: ffffffff911c15e7 R09: 1ffffffff22382bc
R10: dffffc0000000000 R11: fffffbfff22382bd R12: 0000000000000016
R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff92000000f44
FS:  00007febb69d26c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000068a6b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __get_random_u32_below+0x14/0x90 drivers/char/random.c:536
 get_random_u32_below include/linux/random.h:63 [inline]
 garp_join_timer_arm net/802/garp.c:410 [inline]
 garp_join_timer+0xd5/0x120 net/802/garp.c:424
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 51 2b cf f6 e8 7c 32 00 f7 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90004bd7da0 EFLAGS: 00000286
RAX: f9eaf99e05559a00 RBX: 0000000000000000 RCX: f9eaf99e05559a00
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: 0000000000000001
RBP: ffffc90004bd7e40 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200097afb4
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x2e/0x80 kernel/entry/common.c:118
Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 e9 fa ff ff 66 90 66 90 e8 90 71 08 f7 e8 4b 71 08 f7 fb 65 48 8b 05 d2 9a 7e 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 9d b6 ee f6 48
RSP: 0018:ffffc90004bd7f08 EFLAGS: 00000286
RAX: ffff888057ef1e00 RBX: 00000000000000ca RCX: f9eaf99e05559a00
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: ffffffff8b1c85a0
RBP: ffffc90004bd7f48 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90004bd7f58 R15: 0000000000000000
 do_syscall_64+0x28/0xa0 arch/x86/entry/common.c:72
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7febb5b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febb69d20e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007febb5e15fa8 RCX: 00007febb5b9c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007febb5e15fa8
RBP: 00007febb5e15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febb5e16038 R14: 00007ffefe69a8d0 R15: 00007ffefe69a9b8
 </TASK>