watchdog: BUG: soft lockup - CPU#0 stuck for 287s! [syz.9.206:1413]
Modules linked in:
CPU: 0 PID: 1413 Comm: syz.9.206 Not tainted 6.1.115-syzkaller-00045-g997d1e6f69f1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0x4/0x700 arch/x86/kernel/unwind_frame.c:265
Code: 41 5e 41 5f 5d c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 99 4c 89 f7 e8 cb 0c 85 00 eb 8f 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 <41> 57 41 56 41 55 41 54 53 48 83 ec 50 49 89 fe 48 ba 00 00 00 00
RSP: 0018:ffffc90000007710 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000007720 RCX: ffffffff879a6000
RDX: dffffc0000000000 RSI: ffffffff814625eb RDI: ffffc90000007720
RBP: ffffc90000007710 R08: ffffc90000007808 R09: 000000000000000b
R10: ffffc90000007810 R11: dffffc0000000001 R12: ffff8881286b2880
R13: ffffffff8165adc0 R14: ffffc90000007800 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f394be77d60 CR3: 00000001135d8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node_track_caller+0xb3/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1290 [inline]
 ndisc_alloc_skb+0xf3/0x2d0 net/ipv6/ndisc.c:424
 ndisc_send_rs+0x264/0x5f0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3985
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1510
 expire_timers kernel/time/timer.c:1555 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1826
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1839
 handle_softirqs+0x1db/0x650 kernel/softirq.c:617
 __do_softirq kernel/softirq.c:655 [inline]
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:704
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:716
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:832 [inline]
RIP: 0010:mntput_no_expire+0x1fd/0x6b0 fs/namespace.c:1247
Code: ff 89 d8 25 00 00 00 01 0f 85 aa 02 00 00 81 cb 00 00 00 01 48 8b 44 24 20 42 0f b6 04 20 84 c0 0f 85 47 04 00 00 41 89 5d 30 <e8> be ee 92 ff 49 8d 9d 98 00 00 00 48 89 df e8 ef 00 ae 00 84 c0
RSP: 0018:ffffc90003037700 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000009800000 RCX: ffff8881286b2880
RDX: ffff8881286b2880 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900030377d0 R08: ffffffff81cea304 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881142a01c0 R14: ffffc90003037760 R15: 1ffff92000606ee8
 mntput fs/namespace.c:1282 [inline]
 namespace_unlock+0x42e/0x4d0 fs/namespace.c:1501
 drop_collected_mounts fs/namespace.c:1984 [inline]
 put_mnt_ns+0xa6/0xe0 fs/namespace.c:4466
 free_nsproxy+0x4e/0x260 kernel/nsproxy.c:191
 put_nsproxy include/linux/nsproxy.h:105 [inline]
 switch_task_namespaces kernel/nsproxy.c:249 [inline]
 exit_task_namespaces+0xb4/0xd0 kernel/nsproxy.c:254
 do_exit+0xbd0/0x2b80 kernel/exit.c:876
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027
 get_signal+0x169d/0x1820 kernel/signal.c:2888
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9306f7ff19
Code: Unable to access opcode bytes at 0x7f9306f7feef.
RSP: 002b:00007f9307d24058 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000003 RBX: 00007f9307145fa0 RCX: 00007f9306f7ff19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f9306ff3986 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9307145fa0 R15: 00007ffd0b1eea28
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 6.1.115-syzkaller-00045-g997d1e6f69f1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x84d/0x930 kernel/smp.c:998
Code: 45 8b 3e 44 89 fe 83 e6 01 31 ff e8 bd 9b 09 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0a e8 f8 97 09 00 e9 2f ff ff ff <f3> 90 42 0f b6 04 3b 84 c0 75 14 41 f7 06 01 00 00 00 0f 84 12 ff
RSP: 0018:ffffc90000087840 EFLAGS: 00000293
RAX: ffffffff816beeda RBX: 1ffff1103edc7a99 RCX: ffff888100395100
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000087958 R08: ffffffff816beea3 R09: ffffed103ede71fb
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000800000000 R14: ffff8881f6e3d4c8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f406f4bfff8 CR3: 000000000700f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
 text_poke_bp_batch+0x1e9/0x730 arch/x86/kernel/alternative.c:1534
 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1732
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:451
 jump_label_update+0x3af/0x450 kernel/jump_label.c:797
 static_key_disable_cpuslocked+0xd1/0x1b0 kernel/jump_label.c:203
 static_key_disable+0x1a/0x30 kernel/jump_label.c:211
 toggle_allocation_gate+0x3b4/0x450 mm/kfence/core.c:818
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>