syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.5.959:5146]
Modules linked in:
CPU: 1 PID: 5146 Comm: syz.5.959 Tainted: G        W         5.10.237-syzkaller-00309-g7e2543346ff7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:stack_trace_consume_entry+0xa/0x290 kernel/stacktrace.c:82
Code: 4c 24 78 75 09 48 8d 65 f0 5b 41 5e 5d c3 e8 1d d2 1b 03 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 <41> 54 53 48 83 ec 20 48 ba 00 00 00 00 00 fc ff df 4c 8d 47 10 4c
RSP: 0018:ffffc900001705a0 EFLAGS: 00000286
RAX: ffffffff84800c82 RBX: ffffc90000170680 RCX: 0000000000170601
RDX: ffffc90001cc7c58 RSI: ffffffff84800c82 RDI: ffffc90000170680
RBP: ffffc900001705b8 R08: ffffc90000170690 R09: ffffc90000170688
R10: 000000000000000f R11: 1ffff9200002e0b9 R12: ffff888128ce8000
R13: ffffffff839898b5 R14: ffffffff815397e0 R15: ffffc900001705c8
FS:  00007fa5d67f56c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5d67d4d58 CR3: 000000013a033000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0xfc/0x140 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 kmem_cache_alloc_trace+0x184/0x2e0 mm/slub.c:2974
 kmalloc include/linux/slab.h:552 [inline]
 dst_cow_metrics_generic+0x55/0x1c0 net/core/dst.c:208
 dst_metrics_write_ptr include/net/dst.h:118 [inline]
 dst_metric_set include/net/dst.h:179 [inline]
 icmp6_dst_alloc+0x36a/0x560 net/ipv6/route.c:3182
 ndisc_send_skb+0x267/0xb40 net/ipv6/ndisc.c:493
 ndisc_send_rs+0x6e5/0x960 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2c7/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x639/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:preempt_count_sub+0x1/0x170 kernel/sched/core.c:4483
Code: 80 e1 07 80 c1 03 38 c1 0f 8c 6e ff ff ff 48 c7 c7 88 43 a3 86 e8 bf 7e 59 00 89 df e9 5b ff ff ff 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 56 53 48 bb 00 00 00 00 00 fc ff df 48 c7 c0 c0 68 c7
RSP: 0018:ffffc90001cc7d18 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000040000002 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90001cc7d30 R08: dffffc0000000000 R09: fffffbfff0d4636b
R10: fffffbfff0d4636b R11: 1ffffffff0d4636a R12: ffff8881f7155fc0
R13: ffff888128cea7ac R14: ffff88811b787700 R15: ffff888128ce8000
 finish_lock_switch kernel/sched/core.c:3786 [inline]
 finish_task_switch+0x12e/0x5a0 kernel/sched/core.c:3886
 context_switch kernel/sched/core.c:4051 [inline]
 __schedule+0xb4f/0x1310 kernel/sched/core.c:4806
 schedule+0x13c/0x1d0 kernel/sched/core.c:4884
 exit_to_user_mode_loop+0x4b/0xe0 kernel/entry/common.c:160
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7fa5d818c969
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:00007fa5d67f5038 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fa5d83b3fa0 RCX: 00007fa5d818c969
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 000000000000000b
RBP: 00007fa5d820eab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa5d83b3fa0 R15: 00007ffeb1310948
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5089 Comm: syz.9.950 Tainted: G        W         5.10.237-syzkaller-00309-g7e2543346ff7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:pvclock_clocksource_read+0xc/0x660 arch/x86/kernel/pvclock.c:68
Code: 7d c8 e9 e1 fe ff ff 22 05 19 bb 74 05 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 <53> 48 81 ec a8 00 00 00 4c 8d 47 08 4c 8d 4f 18 4c 8d 57 1c 4c 8d
RSP: 0018:ffffc90000007270 EFLAGS: 00000006
RAX: 1ffffffff0c58cac RBX: ffff8881f70272c0 RCX: dffffc0000000000
RDX: 0000000000010102 RSI: ffffffff85200e20 RDI: ffffffff86c6f000
RBP: ffffc90000007290 R08: dffffc0000000000 R09: ffffed1022fabb68
R10: ffffed1022fabb68 R11: 1ffff11022fabb67 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8881247413c0 R15: ffffffff859bc6b0
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab44ff0060 CR3: 000000000620f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kvm_clock_read arch/x86/kernel/kvmclock.c:80 [inline]
 kvm_sched_clock_read+0x18/0x40 arch/x86/kernel/kvmclock.c:92
 paravirt_sched_clock arch/x86/include/asm/paravirt.h:22 [inline]
 sched_clock+0x3a/0x40 arch/x86/kernel/tsc.c:252
 sched_clock_cpu+0x1b/0x3d0 kernel/sched/clock.c:371
 irqtime_account_irq+0x6b/0x1b0 kernel/sched/cputime.c:63
 account_irq_exit_time include/linux/vtime.h:115 [inline]
 __irq_exit_rcu+0x1c/0x150 kernel/softirq.c:432
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_irq_work+0xbc/0xd0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661
RIP: 0010:update_stack_state+0x3d7/0x480 arch/x86/kernel/unwind_frame.c:242
Code: 8b 05 0d c1 d3 7e 49 39 45 00 74 0e 48 8b 7d d0 e8 2e fc ff ff 49 89 c6 eb 1d 4c 8b 75 d0 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 f7 e8 1f d6 6e 00 4d 8b 36 48 83 c3 48 48 89 d8 48 c1
RSP: 0018:ffffc90000007478 EFLAGS: 00000246
RAX: 1ffff920002e3e3e RBX: ffffc900000075c8 RCX: ffffc9000171f101
RDX: ffffc9000171f1e8 RSI: 0000000000000006 RDI: ffffc9000171f1e8
RBP: ffffc90000007538 R08: ffffc90000007601 R09: ffffc90000007688
R10: 000000000000000b R11: 1ffff92000000eb9 R12: dffffc0000000000
R13: ffffc900000075f0 R14: ffffc9000171f1f0 R15: 1ffff92000000ec1
 unwind_next_frame+0x3d5/0x700 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x108/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 kmem_cache_alloc_trace+0x184/0x2e0 mm/slub.c:2974
 kmalloc include/linux/slab.h:552 [inline]
 dst_cow_metrics_generic+0x55/0x1c0 net/core/dst.c:208
 dst_metrics_write_ptr include/net/dst.h:118 [inline]
 dst_metric_set include/net/dst.h:179 [inline]
 icmp6_dst_alloc+0x36a/0x560 net/ipv6/route.c:3182
 ndisc_send_skb+0x267/0xb40 net/ipv6/ndisc.c:493
 ndisc_send_rs+0x6e5/0x960 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2c7/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x639/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x49/0x70 kernel/locking/spinlock.c:199
Code: 12 48 89 fb 48 c7 c7 b0 65 2c 86 e8 d1 ef 28 fd 48 89 df 48 83 3d b6 d2 b7 01 00 74 27 e8 53 71 d6 fc 66 90 fb bf 01 00 00 00 <e8> e2 70 cf fc 65 8b 05 77 da 8d 7b 85 c0 74 03 5b 5d c3 e8 b3 d7
RSP: 0018:ffffc9000171f328 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000171f330 R08: dffffc0000000000 R09: fffffbfff0d4636b
R10: fffffbfff0d4636b R11: 1ffffffff0d4636a R12: ffff8881f7055fc0
R13: ffff88810029002c R14: 0000000000000000 R15: ffff8881247413c0
 finish_lock_switch kernel/sched/core.c:3786 [inline]
 finish_task_switch+0x12e/0x5a0 kernel/sched/core.c:3886
 context_switch kernel/sched/core.c:4051 [inline]
 __schedule+0xb4f/0x1310 kernel/sched/core.c:4806
 preempt_schedule_common+0x9b/0xf0 kernel/sched/core.c:4965
 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:4990
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:39
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x60/0x70 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 zap_pte_range mm/memory.c:1375 [inline]
 zap_pmd_range mm/memory.c:1435 [inline]
 zap_pud_range mm/memory.c:1464 [inline]
 zap_p4d_range mm/memory.c:1485 [inline]
 unmap_page_range+0x1a35/0x20c0 mm/memory.c:1506
 unmap_single_vma mm/memory.c:1551 [inline]
 unmap_vmas+0x248/0x340 mm/memory.c:1583
 exit_mmap+0x2dc/0x540 mm/mmap.c:3373
 __mmput+0x93/0x2f0 kernel/fork.c:1153
 mmput+0x4e/0x150 kernel/fork.c:1176
 exit_mm kernel/exit.c:539 [inline]
 do_exit+0x986/0x2470 kernel/exit.c:850
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0xf7d/0x12e0 kernel/signal.c:2793
 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f775aa30969
Code: Unable to access opcode bytes at RIP 0x7f775aa3093f.
RSP: 002b:00007f7759057038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f775ac58160 RCX: 00007f775aa30969
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000007
RBP: 00007f775aab2ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f775ac58160 R15: 00007ffcac2903a8