rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (3878 ticks this GP) idle=e09c/1/0x4000000000000000 softirq=57334/57334 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   887505          0            0
rcu: 	cputime:    18732      20037           56   ==> 38780(ms)
rcu: 	(t=10502 jiffies g=50733 q=2292 ncpus=2)
CPU: 1 UID: 0 PID: 17052 Comm: syz.6.5005 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10-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 b2 e8 f2 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:ffffc900001e0580 EFLAGS: 00000206
RAX: 940984c89c88ff00 RBX: 1ffff9200003c0b8 RCX: 940984c89c88ff00
RDX: 0000000000000003 RSI: ffffffff8d9792eb RDI: ffffffff8be30a00
RBP: ffffc900001e0678 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffffffff8e141800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f0d3fa5b6c0(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 000000010f700000 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
 kfree+0x18e/0x440
 security_task_free+0xa4/0x1b0
 __put_task_struct+0xfd/0x460
 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:raw_spin_rq_unlock_irq+0x13/0x90
Code: cc e8 e1 80 dd 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 66 90 e8 e4 17 e0 09 e8 2f f6 34 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc cc f3 0f 1e fa 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90003acedc8 EFLAGS: 00000282
RAX: 940984c89c88ff00 RBX: 1ffff11026cc754f RCX: 940984c89c88ff00
RDX: 0000000000000007 RSI: ffffffff8d9792eb RDI: ffffffff8be30a00
RBP: ffffc90003acf010 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffff888108ddb980
R13: dffffc0000000000 R14: ffff888108ddb980 R15: ffff888136639f40
 __schedule+0x19d3/0x4d30
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 rcu_preempt_deferred_qs_irqrestore+0x851/0xc40
 rcu_read_unlock_special+0x3fe/0x4c0
 __rcu_read_unlock+0x84/0xe0
 __handle_mm_fault+0x1414/0x5620
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 7d 0a 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc90003acf898 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8881149f0000 RCX: 000000000000059e
RDX: 0000000000000001 RSI: 000020000000f000 RDI: ffff8881149fd140
RBP: ffffc90003acf9f0 R08: ffff8881149ffe32 R09: 1ffff1102293ffc6
R10: dffffc0000000000 R11: ffffed102293ffc7 R12: 1ffff92000759f77
R13: 0000200000001ec0 R14: ffffc90003acfbc8 R15: 000000000000fe33
 _copy_from_iter+0x24c/0x16f0
 netlink_sendmsg+0x6b2/0xb30
 __sock_sendmsg+0x21c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d3eb8eb69
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:00007f0d3fa5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0d3edb5fa0 RCX: 00007f0d3eb8eb69
RDX: 000000000000fe33 RSI: 0000200000001ec0 RDI: 0000000000000007
RBP: 00007f0d3ec11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0d3edb5fa0 R15: 00007ffdedbf1ac8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105162759558 wd_nsec: 105162752340
