rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=12d4/1/0x4000000000000000 softirq=16534/16534 fqs=5247
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1022869          0            0
rcu: 	cputime:    24333      28155           94   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=8153 q=3154 ncpus=2)
CPU: 1 UID: 0 PID: 6660 Comm: syz.0.357 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
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:ffffc900001e04e0 EFLAGS: 00000206
RAX: 318fe1debf70ef00 RBX: 1ffff9200003c0a4 RCX: 318fe1debf70ef00
RDX: 0000000000000000 RSI: ffffffff8d99873a RDI: ffffffff8be29f80
RBP: ffffc900001e05d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f72782186c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30013ff8 CR3: 000000010d634000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 __tlb_remove_table+0x81/0x3b0
 tlb_remove_table_rcu+0x85/0x100
 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:__might_resched+0x188/0x610
Code: 8b 06 c1 e0 08 44 01 f8 3b 44 24 2c 75 61 48 c7 84 24 a0 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 f6 84 24 a1 00 00 00 02 <74> 43 4c 8d 7a 2c 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85
RSP: 0018:ffffc90002fdfc00 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff920005fbf88 RCX: 318fe1debf70ef00
RDX: ffff8881073f1cc0 RSI: ffffffff8db8641b RDI: ffffffff8be29f80
RBP: ffffc90002fdfd20 R08: ffffc90002fdfe27 R09: 0000000000000000
R10: ffffc90002fdfe00 R11: fffff520005fbfc5 R12: 1ffff11020e7e420
R13: dffffc0000000000 R14: ffff8881073f2104 R15: 0000000000000000
 __might_fault+0x77/0x130
 _copy_from_user+0x28/0xb0
 get_user_ifreq+0x6c/0x180
 sock_ioctl+0x6dd/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f727738e9a9
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:00007f7278218038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f72775b6080 RCX: 00007f727738e9a9
RDX: 0000200000000080 RSI: 00000000000089f1 RDI: 000000000000000c
RBP: 00007f7277410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f72775b6080 R15: 00007ffdb3a62188
 </TASK>
sched: DL replenish lagged too much
