rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10144 ticks this GP) idle=1814/1/0x4000000000000000 softirq=30964/30964 fqs=5230
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1265493          0            0
rcu: 	cputime:    31694      20804           76   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=21013 q=2128 ncpus=2)
CPU: 1 UID: 0 PID: 8531 Comm: syz.4.637 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410 #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+0x1ab/0x860
Code: 02 00 00 31 f6 4c 89 54 24 18 e8 b0 2b c9 ff 4c 8b 54 24 18 8b 74 24 04 85 db 75 5d 4d 8b 3f 4d 39 e7 74 52 41 39 6f 10 75 f2 <45> 39 57 14 75 ec 31 c0 49 8b 0c c6 49 3b 4c c7 20 75 df 48 ff c0
RSP: 0018:ffffc900001e06b8 EFLAGS: 00000246
RAX: ffff888135400000 RBX: 0000000000000801 RCX: 0000000000a09d60
RDX: 00000000e38cd97b RSI: 0000000000000001 RDI: 00000000ff105b18
RBP: 00000000366a09d6 R08: 0000000006947fac R09: 00000000f18247d3
R10: 000000000000000f R11: fffffbfff1f46fc7 R12: ffff888135e09d60
R13: 000000000000000f R14: ffffc900001e0720 R15: ffff88810f99b890
FS:  0000200000000440(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2130588580 CR3: 000000002a398000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kasan_save_track+0x4f/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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 aa 9c 21 f6 48 89 df e8 02 34 22 f6 e8 ed 85 4b f6 fb bf 01 00 00 00 <e8> 52 2d 14 f6 65 8b 05 cb 70 24 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc9000479e6b0 EFLAGS: 00000282
RAX: 4849357bad0ae500 RBX: ffff888128c5f938 RCX: 4849357bad0ae500
RDX: 0000000000000006 RSI: ffffffff8d9b6dc3 RDI: 0000000000000001
RBP: ffffc9000479e7f0 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffffc9000479e740
R13: 00000003fffffffc R14: 0000000000000000 R15: ffff88803a91d080
 shmem_add_to_page_cache+0x8ee/0xba0
 shmem_alloc_and_add_folio+0x846/0xf60
 shmem_get_folio_gfp+0x59d/0x1660
 shmem_write_begin+0xf7/0x2b0
 generic_perform_write+0x2c5/0x900
 shmem_file_write_iter+0xf8/0x120
 __kernel_write_iter+0x428/0x910
 dump_user_range+0x8a0/0xc90
 elf_core_dump+0x337b/0x3990
 coredump_write+0x1169/0x1900
 vfs_coredump+0x1a4b/0x2ab0
 get_signal+0x1109/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 irqentry_exit_to_user_mode+0x81/0x120
 exc_general_protection+0x171/0x200
 asm_exc_general_protection+0x26/0x30
RIP: 0033:0x7f213038ebf1
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000200000000290 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f21305b5fa0 RCX: 00007f213038ebe9
RDX: 00002000000002c0 RSI: 0000200000000290 RDI: 0000000002088000
RBP: 00007f2130411e19 R08: 0000200000000440 R09: 0000200000000440
R10: 0000200000000300 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f21305b6038 R14: 00007f21305b5fa0 R15: 00007ffe43746088
 </TASK>
