rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=751c/1/0x4000000000000000 softirq=13622/13624 fqs=4449
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1054231          0            0
rcu: 	cputime:    34045      18444           86   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=6089 q=2864 ncpus=2)
CPU: 0 UID: 0 PID: 5999 Comm: syz.2.32 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:stack_trace_consume_entry+0x38/0x280
Code: 48 83 ec 18 48 ba 00 00 00 00 00 fc ff df 4c 8d 47 10 4c 89 c5 48 c1 ed 03 0f b6 44 15 00 84 c0 0f 85 09 01 00 00 44 8b 4f 10 <4c> 8d 77 08 4d 89 f5 49 c1 ed 03 41 0f b6 44 15 00 84 c0 0f 85 22
RSP: 0018:ffffc90000007598 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900000076a0 RCX: b85076c29ff68a00
RDX: dffffc0000000000 RSI: ffffffff81ac33fc RDI: ffffc900000076a0
RBP: 1ffff92000000ed6 R08: ffffc900000076b0 R09: 0000000000000000
R10: ffffc90000007638 R11: ffffffff81ac3450 R12: ffff888105ec5640
R13: ffff88802ab24900 R14: ffffffff81ac3450 R15: ffffc900000075e8
FS:  00007f65bb55a6c0(0000) GS:ffff8880b8680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000035000 CR3: 000000002136c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x110/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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:perf_trace_lock_acquire+0x161/0x410
Code: 89 4c 24 08 42 80 3c 38 00 74 08 4c 89 f7 e8 96 1a 86 00 49 83 3e 00 75 25 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 75 1a 86 00 48 83 3b 00 0f 84 c9 01 00 00 48 8d
RSP: 0018:ffffc90004d2fb60 EFLAGS: 00000246
RAX: 1ffffd1fe28c923b RBX: ffffe8ff146491d8 RCX: ffffe8ff146491d8
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: ffffc90004d2fc58 R08: 0000000000000002 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1020e09e81 R12: 1ffff920009a5f74
R13: 000000000000000d R14: ffffffff8e00b5c8 R15: dffffc0000000000
 lock_acquire+0x311/0x360
 __fget_files+0x47/0x420
 fdget+0x16c/0x1e0
 __x64_sys_sendmsg+0xf4/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65ba78ebe9
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:00007f65bb55a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f65ba9b5fa0 RCX: 00007f65ba78ebe9
RDX: 0000000000000003 RSI: 0000200000000980 RDI: 0000000000000006
RBP: 00007f65ba811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f65ba9b6038 R14: 00007f65ba9b5fa0 R15: 00007ffc1aa54428
 </TASK>
sched: DL replenish lagged too much
