watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.4.827:7443] Modules linked in: irq event stamp: 313042 hardirqs last enabled at (313041): [] kvm_wait+0x23b/0x2c0 hardirqs last disabled at (313042): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1037 softirqs last enabled at (313034): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (313034): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (313034): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (312991): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (312991): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (312991): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 1 UID: 0 PID: 7443 Comm: syz.4.827 Not tainted 6.11.0-syzkaller-10557-gb24d7f0da6ef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 aa 3e 54 00 e8 c5 fd 5b 00 45 38 f7 75 15 66 90 e8 19 3e 54 00 0f 00 2d 52 bc c7 0a fb f4 50 fe ff ff e8 06 3e 54 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38 RSP: 0018:ffffc9000353f9e0 EFLAGS: 000002d3 RAX: ffffffff81407727 RBX: ffff8880234494a0 RCX: ffff888026f15a00 RDX: 0000000000000000 RSI: ffffffff8c0aca40 RDI: ffffffff8c6100a0 RBP: ffffc9000353fab0 R08: ffffffff942687ff R09: 1ffffffff284d0ff R10: dffffc0000000000 R11: fffffbfff284d100 R12: 1ffff920006a7f40 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003 FS: 00005555663fd500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32906ff8 CR3: 00000000233d8000 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:665 dput+0x18a/0x2b0 fs/dcache.c:855 __fput+0x5d2/0x880 fs/file_table.c:439 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: 0033:0x7feb8a57dff9 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:00007ffca8329948 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007feb8a737a80 RCX: 00007feb8a57dff9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007feb8a737a80 R08: 0000000000000006 R09: 00007ffca8329c3f R10: 00000000005e69a0 R11: 0000000000000246 R12: 000000000002087f R13: 00007ffca8329a50 R14: 0000000000000032 R15: ffffffffffffffff Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7444 Comm: syz.1.828 Not tainted 6.11.0-syzkaller-10557-gb24d7f0da6ef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:asm_sysvec_irq_work+0x0/0x20 arch/x86/include/asm/idtentry.h:738 Code: b6 13 e4 ff e9 51 05 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 01 04 00 00 48 89 c4 48 89 e7 e8 16 f4 e3 ff e9 31 05 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 e1 03 00 00 48 89 c4 48 89 e7 e8 RSP: 0018:ffffc90000007e18 EFLAGS: 00000086 RAX: ad05ecccd47d9e00 RBX: ffffc90000007ee0 RCX: ffffffff8170892a RDX: dffffc0000000000 RSI: ffffffff8c0aca40 RDI: ffffffff8c6100a0 RBP: ffffc90000007f50 R08: ffffffff942687ff R09: 1ffffffff284d0ff R10: dffffc0000000000 R11: fffffbfff284d100 R12: 0000000000000200 R13: 0000000000000000 R14: ffffffff8e60a0c0 R15: 1ffff11005a1d780 FS: 000055557d385500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3290cff8 CR3: 000000007de06000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline] RIP: 0010:handle_softirqs+0x1e3/0x980 kernel/softirq.c:542 Code: 7c 24 70 45 0f b7 e4 48 c7 c7 60 bf 09 8c e8 a4 0a 6d 0a 65 66 c7 05 62 7e ac 7e 00 00 e8 55 1b 45 00 fb 49 c7 c6 c0 a0 60 8e ff ff ff ff 41 0f bc c4 41 89 c7 41 ff c7 0f 84 eb 03 00 00 44 RSP: 0018:ffffc90000007e40 EFLAGS: 00000286