watchdog: BUG: soft lockup - CPU#1 stuck for 121s! [syz.2.49:6108] Modules linked in: irq event stamp: 24059913 hardirqs last enabled at (24059912): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (24059913): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (23793928): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (23793928): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (23793928): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (23793931): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (23793931): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (23793931): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6108 Comm: syz.2.49 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 RIP: 0010:preempt_count_sub+0x0/0x170 kernel/sched/core.c:5879 Code: c7 c7 54 02 7f 8f e8 7f f5 90 00 e9 5c ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 53 48 bb 00 00 00 00 00 fc ff df 48 c7 c0 a0 66 80 RSP: 0018:ffffc90000a089b8 EFLAGS: 00000206 RAX: d17acd97083b7200 RBX: 0000000000000a02 RCX: d17acd97083b7200 RDX: 0000000000000002 RSI: ffffffff8d749f78 RDI: 0000000000000001 RBP: ffffc90000a08a40 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: dffffc0000000000 R13: ffff8880274e8038 R14: ffffffff99a7d650 R15: 1ffff92000141138 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3da4694bd3 CR3: 0000000078bae000 CR4: 00000000003526f0 DR0: ffff8880b8927a20 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xad/0x110 kernel/locking/spinlock.c:194 debug_object_assert_init+0x20e/0x380 lib/debugobjects.c:1009 debug_timer_assert_init kernel/time/timer.c:845 [inline] debug_assert_init kernel/time/timer.c:890 [inline] __mod_timer+0x4a/0xf30 kernel/time/timer.c:1067 mrp_join_timer_arm net/802/mrp.c:597 [inline] mrp_join_timer+0x13f/0x170 net/802/mrp.c:612 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 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 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90005107240 EFLAGS: 00000286 RAX: d17acd97083b7200 RBX: 0000000000000000 RCX: d17acd97083b7200 RDX: 0000000000000007 RSI: ffffffff8d749f78 RDI: 0000000000000001 RBP: ffffc900051072e0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000a20e48 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:___pte_offset_map+0x0/0x2a0 mm/pgtable-generic.c:283 Code: f6 b3 b0 ff 48 89 df 48 c7 c6 c0 21 76 8b e8 f7 c9 f7 ff 90 0f 0b 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 50 49 89 d7 48 89 f3 49 RSP: 0018:ffffc900051073a0 EFLAGS: 00000293 RAX: ffffffff820f111d RBX: ffffc90005107620 RCX: ffff88801a7cda00 RDX: ffffc900051073d8 RSI: 00007f3a2c522000 RDI: ffff888033021b10 RBP: ffffc900051076b0 R08: ffffc9000510760f R09: 0000000000000000 R10: ffffc90005107600 R11: fffff52000a20ec2 R12: ffff888033021b10 R13: dffffc0000000000 R14: ffffc90005107880 R15: 00007f3a2c522000 __pte_offset_map include/linux/mm.h:3134 [inline] __pte_offset_map_lock+0x46/0x1e0 mm/pgtable-generic.c:398 pte_offset_map_lock include/linux/mm.h:3149 [inline] zap_pte_range mm/memory.c:1717 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x3872/0x4210 mm/memory.c:1894 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984 exit_mmap+0x245/0xba0 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1379 exit_mm+0x1da/0x2c0 kernel/exit.c:589 do_exit+0x859/0x2550 kernel/exit.c:940 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3a2dd8e969 Code: Unable to access opcode bytes at 0x7f3a2dd8e93f. RSP: 002b:00007f3a2ec850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f3a2dfb5fa8 RCX: 00007f3a2dd8e969 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3a2dfb5fa8 RBP: 00007f3a2dfb5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3a2dfb5fac R13: 0000000000000000 R14: 00007ffddad241d0 R15: 00007ffddad242b8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5836 Comm: kworker/0:4 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 Workqueue: events drain_vmap_area_work RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc900043af8c0 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b883ad40 RCX: ffff88806024da00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900043afa18 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff11017127e99 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b893f4c8 FS: 0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559cac5a2cc8 CR3: 000000007f744000 CR4: 00000000003526f0 DR0: ffff8880b8927a20 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 flush_tlb_kernel_range+0x45f/0x470 arch/x86/mm/tlb.c:-1 __purge_vmap_area_lazy+0x441/0xae0 mm/vmalloc.c:2284 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2338 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245