rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=54dc/1/0x4000000000000000 softirq=29995/29995 fqs=4649
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   952924          0            0
rcu: 	cputime:    27715      24774           99   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=18617 q=2388 ncpus=2)
CPU: 1 UID: 0 PID: 9070 Comm: syz.1.999 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-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 d2 2c 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:ffffc900001e03e0 EFLAGS: 00000206
RAX: beabd8ad9eb08000 RBX: 1ffff9200003c084 RCX: beabd8ad9eb08000
RDX: 0000000000000002 RSI: ffffffff8d998874 RDI: ffffffff8be29f40
RBP: ffffc900001e04d0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fb45aa8e6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004cc0 CR3: 0000000029ce0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 is_bpf_text_address+0x292/0x2b0
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 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:stack_depot_save_flags+0x168/0x900
Code: c8 31 c5 c1 c0 18 29 c5 48 8b 05 33 7e e7 14 8b 0d 25 7e e7 14 21 e9 48 c1 e1 04 4c 8d 3c 08 65 ff 05 dc a6 a9 0d 4c 8b 24 08 <4d> 39 fc 0f 84 88 00 00 00 45 89 d5 eb 2d 90 0f 0b 90 31 c0 e9 ce
RSP: 0018:ffffc900035eefc8 EFLAGS: 00000282
RAX: ffff888135400000 RBX: 0000000000002000 RCX: 00000000005ce640
RDX: 00000000d9d2b32b RSI: 0000000000000001 RDI: 00000000ced19326
RBP: 000000000ce5ce64 R08: 000000003a34599e R09: 0000000073391daa
R10: 000000000000000d R11: ffffffff81acffe0 R12: ffff88802d99bb50
R13: 1ffff920006bde0c R14: ffffc900035ef080 R15: ffff8881359ce640
 save_stack+0x103/0x1f0
 __reset_page_owner+0x71/0x1f0
 free_unref_folios+0xc66/0x14d0
 folios_put_refs+0x559/0x640
 shmem_undo_range+0x49e/0x14b0
 shmem_truncate_range+0x33/0xa0
 shmem_setattr+0xae4/0xea0
 notify_change+0xb36/0xe40
 do_truncate+0x1a4/0x220
 path_openat+0x306c/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: 0033:0x7fb459b8e9a9
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:00007fb45aa8e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb459db6080 RCX: 00007fb459b8e9a9
RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007fb459c10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb459db6080 R15: 00007fff28783d68
 </TASK>
sched: DL replenish lagged too much
