clocksource: Long readout interval, skipping watchdog check: cs_nsec: 5927067228 wd_nsec: 5927067754
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10409 ticks this GP) idle=e544/1/0x4000000000000000 softirq=98769/99015 fqs=0
rcu: 	(t=10501 jiffies g=94777 q=621 ncpus=2)
rcu: rcu_preempt kthread starved for 10501 jiffies! g94777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26664 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 23936 Comm: syz.9.5516 Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-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:native_queued_spin_lock_slowpath+0xaf/0x8e0
Code: 00 00 00 c7 44 24 60 00 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 <48> 89 df be 04 00 00 00 e8 94 f3 a8 f6 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000329f800 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff888026b24348 RCX: ffffffff8b7a05ac
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888026b24348
RBP: ffffc9000329f8f8 R08: ffff888026b2434b R09: 1ffff11004d64869
R10: dffffc0000000000 R11: ffffed1004d6486a R12: 1ffff92000653f08
R13: 0000000000000001 R14: ffffc9000329f860 R15: 1ffff11004d64869
FS:  0000555557d54500(0000) GS:ffff8880b862a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97d93f4d58 CR3: 000000003acd0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 futex_unqueue+0xf6/0x240
 __futex_wait+0x223/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe66c78ebe9
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:00007ffe20482c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000008ee86 RCX: 00007fe66c78ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe66c9b5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 0000001b20482eff
R10: 00007ffe20482d00 R11: 0000000000000246 R12: 00007fe66c9b5fac
R13: 00007ffe20482d00 R14: 000000000008eeb8 R15: 00007ffe20482d20
 </TASK>
CPU: 1 UID: 0 PID: 23937 Comm: syz.9.5516 Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-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+0x87/0x5e0
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 32 4c 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:ffffc900001e03a0 EFLAGS: 00000206
RAX: 083d2a77be8aa000 RBX: 1ffff9200003c07c RCX: 083d2a77be8aa000
RDX: 0000000000000002 RSI: ffffffff8d9b163e RDI: ffffffff8be2fd00
RBP: ffffc900001e0498 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffffffff8e13f100
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fe66d6016c0(0000) GS:ffff8881a3c2a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001440 CR3: 000000003acd0000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
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
 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:__sanitizer_cov_trace_const_cmp4+0x31/0x90
Code: 24 65 48 8b 14 25 08 60 9f 92 65 8b 0d e8 bc df 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 74 52 <8b> 8a 18 16 00 00 83 f9 03 75 47 48 8b 8a 20 16 00 00 44 8b 8a 1c
RSP: 0018:ffffc90003797bd8 EFLAGS: 00000246
RAX: ffffffff81b3d726 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888107241cc0 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc90003797cf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520006f2f6c R12: ffffc9000329fb18
R13: ffff888026b24388 R14: 00000000ffffffff R15: ffffc9000329fab8
 futex_wake+0x376/0x560
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe66c78ebe9
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:00007fe66d6010e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe66c9b5fa8 RCX: 00007fe66c78ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fe66c9b5fac
RBP: 00007fe66c9b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe66c9b6038 R14: 00007ffe204829c0 R15: 00007ffe20482aa8
 </TASK>
