watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.971:8663] Modules linked in: irq event stamp: 850540 hardirqs last enabled at (850539): [] kvm_wait+0x23b/0x2c0 hardirqs last disabled at (850540): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (850536): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (850536): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (850536): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (850491): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (850491): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (850491): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 8663 Comm: syz.2.971 Not tainted 6.11.0-rc4-syzkaller-00286-g41d0c4677fee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1060 Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 4a 16 53 00 e8 35 7a 5a 00 45 38 f7 75 15 66 90 e8 b9 15 53 00 0f 00 2d 82 ba c7 0a fb f4 50 fe ff ff e8 a6 15 53 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38 RSP: 0018:ffffc90015e9f9e0 EFLAGS: 000002d3 RAX: ffffffff81407737 RBX: ffff8880231123b8 RCX: ffff888028099e00 RDX: 0000000000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c608480 RBP: ffffc90015e9fab0 R08: ffffffff941e187f R09: 1ffffffff283c30f R10: dffffc0000000000 R11: fffffbfff283c310 R12: 1ffff92002bd3f40 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003 FS: 000055555f25f500(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32d05ff8 CR3: 0000000079a7e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:596 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline] __pv_queued_spin_lock_slowpath+0x8d0/0xdb0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:351 [inline] lock_for_kill+0xdc/0x210 fs/dcache.c:660 dput+0x18a/0x2b0 fs/dcache.c:850 __fput+0x5f8/0x8a0 fs/file_table.c:430 task_work_run+0x24f/0x310 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c7f77def9 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:00007ffc4b8e6218 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f9c7f937a80 RCX: 00007f9c7f77def9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f9c7f937a80 R08: 0000000000000006 R09: 00007ffc4b8e650f R10: 00000000005e5db0 R11: 0000000000000246 R12: 0000000000049828 R13: 00007ffc4b8e6320 R14: 0000000000000032 R15: ffffffffffffffff Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 8654 Comm: syz.4.967 Not tainted 6.11.0-rc4-syzkaller-00286-g41d0c4677fee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:native_apic_msr_eoi+0xf/0x20 arch/x86/include/asm/apic.h:215 Code: f8 c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000a18d58 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffc90000a18d98 RCX: 000000000000080b RDX: 0000000000000000 RSI: ffffffff8c608460 RDI: ffffffff8c608420 RBP: 0000000000000000 R08: ffffffff813578d1 R09: 1ffffffff2030ba5 R10: dffffc0000000000 R11: fffffbfff2030ba6 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555589de2500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32e05ff8 CR3: 0000000024062000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_eoi arch/x86/include/asm/apic.h:415 [inline] __sysvec_irq_work+0x12/0x430 arch/x86/kernel/irq_work.c:19 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x4f/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline] RIP: 0010:handle_softirqs+0x1df/0x970 kernel/softirq.c:542 Code: 89 7c 24 70 0f b7 db 48 c7 c7 60 ca 09 8c e8 a8 25 62 0a 65 66 c7 05 66 73 ac 7e 00 00 e8 99 8d 43 00 fb 49 c7 c4 c0 a0 60 8e ff ff ff ff 0f bc c3 41 89 c7 41 ff c7 0f 84 e6 03 00 00 89 5c RSP: 0018:ffffc90000a18e40 EFLAGS: 00000286 RAX: 2302e89265297e00 RBX: 0000000000000200 RCX: ffffffff8170432a RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c608480 RBP: ffffc90000a18f50 R08: ffffffff941e187f R09: 1ffffffff283c30f R10: dffffc0000000000 R11: fffffbfff283c310 R12: ffffffff8e60a0c0 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920001431dc __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 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:rcu_read_unlock_special+0x88/0x550 kernel/rcu/tree_plugin.h:692 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 49 36 89 7e 41 f7 c4 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a RSP: 0018:ffffc90015ef7c20 EFLAGS: 00000206 RAX: 2302e89265297e00 RBX: 1ffff92002bdef8c RCX: ffffffff8170432a RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c608480 RBP: ffffc90015ef7d00 R08: ffffffff941e187f R09: 1ffffffff283c30f R10: dffffc0000000000 R11: fffffbfff283c310 R12: 0000000000000000 R13: ffff888027e95e60 R14: ffffc90015ef7c60 R15: 1ffff92002bdef88 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:436 dput+0x197/0x2b0 fs/dcache.c:851 __fput+0x5f8/0x8a0 fs/file_table.c:430 task_work_run+0x24f/0x310 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f560817def9 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:00007ffc7fa96fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f5608337a80 RCX: 00007f560817def9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f5608337a80 R08: 0000000000000006 R09: 00007ffc7fa9729f R10: 00000000005e2ef8 R11: 0000000000000246 R12: 0000000000049641 R13: 00007ffc7fa970b0 R14: 0000000000000032 R15: ffffffffffffffff