rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8925 ticks this GP) idle=e9b4/1/0x4000000000000000 softirq=22794/24377 fqs=5243
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   940483       2398            0
rcu: 	cputime:    28109      24376          111   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=14813 q=3582 ncpus=2)
CPU: 0 UID: 0 PID: 7124 Comm: syz.0.320 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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:run_timer_softirq+0xd/0x180
Code: 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 f3 0f 1e fa 55 41 56 53 e8 f3 22 12 00 <e8> ee 9b c0 09 89 c5 89 c3 bf 08 00 00 00 89 c6 e8 1e 27 12 00 83
RSP: 0018:ffffc90000007e20 EFLAGS: 00000246
RAX: ffffffff81ae05fd RBX: 0000000000000101 RCX: ffff88810a375640
RDX: 0000000000000100 RSI: ffffffff8be29f20 RDI: ffffffff8be29ee0
RBP: ffffc90000007f50 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: ffffffff81ae05f0 R12: 1ffffffff1bc1819
R13: 0000000000000002 R14: 0000000000000001 R15: ffffffff8de0c0c8
FS:  00007ff8db1e16c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000011c0 CR3: 000000010ee54000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 2d 21 f6 e8 c6 00 58 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000748f0c0 EFLAGS: 00000282
RAX: 851592b1cff78900 RBX: 0000000000000000 RCX: 851592b1cff78900
RDX: 0000000000000007 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc9000748f160 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000e91e18
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x0/0x2390
Code: 09 cc 89 d9 80 e1 07 80 c1 03 38 c1 7c 92 48 89 df e8 d4 a1 b0 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49
RSP: 0018:ffffc9000748f220 EFLAGS: 00000287
RAX: ffffc9000748f310 RBX: ffffc9000748f288 RCX: 0000000000000001
RDX: ffffc9000748f318 RSI: dffffc0000000000 RDI: ffffc9000748f288
RBP: 1ffff92000e91e52 R08: ffffc9000748f201 R09: 0000000000000000
R10: ffffc9000748f288 R11: fffff52000e91e5d R12: ffffc9000748f2c0
R13: ffffc9000748f298 R14: 1ffff92000e91e53 R15: ffffc9000748f290
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 __free_slab+0xb9/0x1c0
 __slab_free+0x326/0x400
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_node_noprof+0x21b/0x4e0
 allocate_slab+0x17c/0x3b0
 ___slab_alloc+0xbfc/0x1480
 kmem_cache_alloc_noprof+0x283/0x3c0
 alloc_empty_file+0x55/0x1d0
 path_openat+0x107/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff8da38e9a9
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:00007ff8db1e1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff8da5b6080 RCX: 00007ff8da38e9a9
RDX: 0000000000000000 RSI: 0000200000000500 RDI: ffffffffffffffff
RBP: 00007ff8da410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff8da5b6080 R15: 00007fffc8a9e1d8
 </TASK>
sched: DL replenish lagged too much
