rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=e05c/1/0x4000000000000000 softirq=22908/22917 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1020644          0            0
rcu: 	cputime:    25583      26916           91   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=12053 q=2468 ncpus=2)
CPU: 1 UID: 0 PID: 7439 Comm: syz.4.631 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 9b 93 56 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> e3 c1 1f f6 65 8b 05 bc f9 2e 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e09c0 EFLAGS: 00000206
RAX: f61f65b55f43d800 RBX: 0000000000000a02 RCX: f61f65b55f43d800
RDX: 0000000000000002 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc900001e0a58 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888136625940 R15: 1ffff9200003c138
FS:  00007fddb2fe36c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000122d22000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __mod_timer+0xb37/0xf30
 dev_watchdog+0x568/0x6b0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kernelmode_fixup_or_oops+0x0/0xf0
Code: 89 f7 e8 53 6b af 00 e9 6e ff ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 41 54 53 48 89 d3 49 89 f6 49 89 ff e8 aa 47 4c 00
RSP: 0018:ffffc90002e6f978 EFLAGS: 00000283
RAX: ffffffff8173cf78 RBX: 1ffff920005cdf3c RCX: 0000000000080000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002e6fac8
RBP: ffffc90002e6fa80 R08: 0000000000000001 R09: 1ffff1100577ecae
R10: dffffc0000000000 R11: ffffed100577ecaf R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff920005cdf6a R15: ffffc90002e6fb50
 __bad_area_nosemaphore+0x11a/0x780
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x30/0x90
Code: 83 f9 08 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08
RSP: 0018:ffffc90002e6fb78 EFLAGS: 00010206
RAX: 00007ffffffff001 RBX: 0000000000000038 RCX: 0000000000000038
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffc90002e6fc00
RBP: ffffc90002e6fd90 R08: ffffc90002e6fc37 R09: 1ffff920005cdf86
R10: dffffc0000000000 R11: fffff520005cdf87 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc90002e6fc00 R15: 0000000000000000
 _copy_from_user+0x7a/0xb0
 ___sys_recvmsg+0x12e/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fddb218eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fddb2fe3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fddb23b5fa0 RCX: 00007fddb218eb69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000f
RBP: 00007fddb2211df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fddb23b5fa0 R15: 00007ffcf588d828
 </TASK>
sched: DL replenish lagged too much
