rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10459 ticks this GP) idle=1a0c/1/0x4000000000000000 softirq=32231/32233 fqs=5241
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   977334          0            0
rcu: 	cputime:    29086      23403          108   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=23037 q=2196 ncpus=2)
CPU: 0 UID: 0 PID: 10295 Comm: syz.0.1380 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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 62 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:ffffc900000073e0 EFLAGS: 00000206
RAX: 939da69676e9d100 RBX: 1ffff92000000e84 RCX: 939da69676e9d100
RDX: 0000000000000002 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: ffffc900000074d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f3208fe46c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004000 CR3: 00000001261ac000 CR4: 00000000000006f0
DR0: 0000000000000000 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_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_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 2d 21 f6 e8 c6 00 58 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000a0572c0 EFLAGS: 00000282
RAX: 939da69676e9d100 RBX: 0000000000000000 RCX: 939da69676e9d100
RDX: 0000000000000000 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc9000a057360 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200140ae58
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x58/0x360
Code: 8b 05 dc d4 01 11 48 89 44 24 58 e9 39 02 00 00 65 8b 05 df d4 01 11 83 f8 08 0f 83 b8 01 00 00 89 c0 48 0f a3 05 88 ad 03 0e <73> 16 e8 f1 f0 08 00 84 c0 75 0d f6 05 e9 90 ed 0d 01 0f 84 d7 01
RSP: 0018:ffffc9000a057420 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88810cec01e0
RBP: ffffffff820903c2 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10219d8030 R12: 0000000000000001
R13: ffff88810cec01e0 R14: 0000000000000000 R15: 0000000000000001
 down_read_trylock+0x20a/0x380
 lock_mm_and_find_vma+0x32/0x300
 do_user_addr_fault+0x331/0x1390
 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 fd 00 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc9000a057758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888033fc0000 RCX: 0000000000006004
RDX: 0000000000000001 RSI: 0000200000004000 RDI: ffff888033fc3fc0
RBP: ffffc9000a0578b0 R08: ffff888033ff3fdf R09: 1ffff110067fe7fb
R10: dffffc0000000000 R11: ffffed10067fe7fc R12: 1ffff9200140afbf
R13: 0000200000000040 R14: ffffc9000a057e08 R15: 0000000000033fe0
 _copy_from_iter+0x24c/0x16f0
 netlink_sendmsg+0x6b2/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f320818e9a9
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:00007f3208fe4038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f32083b5fa0 RCX: 00007f320818e9a9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000e
RBP: 00007f3208210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f32083b5fa0 R15: 00007ffd65739058
 </TASK>
