rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10490 ticks this GP) idle=070c/1/0x4000000000000000 softirq=14595/14718 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   960012        324            0
rcu: 	cputime:    28516      23981           72   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=6357 q=12005 ncpus=2)
CPU: 1 UID: 0 PID: 6037 Comm: syz.2.46 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:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 37 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e05a0 EFLAGS: 00000206
RAX: beab8daf04a88100 RBX: 1ffff9200003c0bc RCX: beab8daf04a88100
RDX: 0000000000000003 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: ffffc900001e0698 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fc619a786c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff74e5506c0 CR3: 00000000289b2000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000090602
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438
 rcu_read_unlock include/linux/rcupdate.h:873 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680
 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
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x18e/0x440 mm/slub.c:4842
 slab_free_after_rcu_debug+0x60/0x2a0 mm/slub.c:4680
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832
 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_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7109
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 5b 22 21 f6 e8 96 f5 57 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:ffffc9000290fa80 EFLAGS: 00000282
RAX: beab8daf04a88100 RBX: ffff888107873980 RCX: beab8daf04a88100
RDX: 0000000000000007 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc9000290fb20 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000521f50
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:__mutex_unlock_slowpath+0x144/0x700 kernel/locking/mutex.c:920
Code: 89 7c 24 20 48 89 84 24 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 06 84 c0 0f 85 4c 01 00 00 83 3d 3c 68 3b 0e 00 <75> 4c 48 8b 84 24 a0 00 00 00 48 83 e0 f8 65 48 8b 0c 25 08 10 a0
RSP: 0018:ffffc9000290fbe0 EFLAGS: 00000246
RAX: 0000000000000004 RBX: ffff888029239800 RCX: ffffffff99ab5203
RDX: 1ffffffff1f44346 RSI: 0000000000000008 RDI: ffff888029239840
RBP: ffffc9000290fcf0 R08: ffff888029239847 R09: 1ffff11005247308
R10: dffffc0000000000 R11: ffffed1005247309 R12: ffffc9000290fc80
R13: 1ffff92000521f84 R14: 1ffffffff3356a5c R15: ffff888029239840
 __do_sys_perf_event_open kernel/events/core.c:13694 [inline]
 __se_sys_perf_event_open+0x194c/0x1d70 kernel/events/core.c:13333
 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: 0033:0x7fc618b8eb69
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:00007fc619a78038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc618db5fa0 RCX: 00007fc618b8eb69
RDX: bfffffffffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007fc618c11df1 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc618db5fa0 R15: 00007ffcedea5768
 </TASK>
sched: DL replenish lagged too much
