rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10501 ticks this GP) idle=d384/1/0x4000000000000000 softirq=16132/16133 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   960437          0            0
rcu: 	cputime:    24173      28316           95   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=8693 q=3496 ncpus=2)
CPU: 0 UID: 0 PID: 6329 Comm: syz.2.194 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:stack_depot_save_flags+0x43/0x900
Code: 0d 48 89 44 24 38 f7 c2 00 0c 00 00 41 0f 95 c7 83 f9 04 0f 83 44 01 00 00 89 d3 49 89 fe 89 4c 24 04 e8 90 a3 b6 fc 41 89 c2 <31> c0 45 85 d2 0f 84 01 04 00 00 80 3d 1b 8a e7 14 00 0f 85 f4 03
RSP: 0018:ffffc900000078b8 EFLAGS: 00000206
RAX: 000000000000000a RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 000000000000001d RDI: ffffc90000007930
RBP: ffffc90000007b58 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: 000000000000000a R11: fffffbfff1f43d1f R12: ffffea0000bcc7c0
R13: 0000000000000000 R14: ffffc90000007930 R15: ffffc90000007900
FS:  00007f6a0a95c6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000fffa18 CR3: 0000000121b00000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kasan_save_track+0x4f/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 rcu_core+0xca8/0x1710
 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: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 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:ffffc90007937080 EFLAGS: 00000282
RAX: 2497e8ba32297500 RBX: 0000000000000000 RCX: 2497e8ba32297500
RDX: 0000000000000000 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc90007937120 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000f26e10
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__rcu_read_unlock+0x7f/0xe0
Code: 00 75 27 43 0f b6 04 3c 84 c0 75 41 8b 03 3d 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc cc 90 0f 0b 90 eb eb <e8> 6c 00 00 00 eb d2 89 d9 80 e1 07 80 c1 03 38 c1 7c a5 49 89 fe
RSP: 0018:ffffc900079371e8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880292a5a84 RCX: 2497e8ba32297500
RDX: 0000000000000000 RSI: ffffffff8db863da RDI: ffff8880292a5640
RBP: dffffc0000000000 R08: ffffc90007937810 R09: 0000000000000000
R10: ffffc90007937338 R11: fffff52000f26e69 R12: 1ffff11005254b50
R13: ffffc90007930000 R14: ffff8880292a5a88 R15: dffffc0000000000
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 kmem_cache_free+0x309/0x400
 __fput_deferred+0x227/0x390
 fput_close+0x119/0x200
 path_openat+0x313c/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: 0033:0x7f6a09b8d4d0
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007f6a0a95bf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6a09b8d4d0
RDX: 0000000000000002 RSI: 00007f6a0a95bfa0 RDI: 00000000ffffff9c
RBP: 00007f6a0a95bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6a09db5fa0 R15: 00007fff8beccb88
 </TASK>
sched: DL replenish lagged too much
