watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.3.551:6950] Modules linked in: irq event stamp: 899184 hardirqs last enabled at (899183): [] kvm_wait+0x23b/0x2c0 hardirqs last disabled at (899184): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (899180): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (899180): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (899180): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (899153): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (899153): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (899153): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 6950 Comm: syz.3.551 Not tainted 6.12.0-rc4-syzkaller #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 4a 31 54 00 e8 a5 f7 5b 00 45 38 f7 75 15 66 90 e8 b9 30 54 00 0f 00 2d 72 7d c7 0a fb f4 50 fe ff ff e8 a6 30 54 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38 RSP: 0018:ffffc900093af700 EFLAGS: 00000246 RAX: ffffffff8140b727 RBX: ffff888148c428c0 RCX: 0000000000040000 RDX: ffffc90009af4000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900093af7d0 R08: ffffffff942c983f R09: 1ffffffff2859307 R10: dffffc0000000000 R11: fffffbfff2859308 R12: 1ffff92001275ee4 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003 FS: 00007f2a406eb6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2a406eaf98 CR3: 0000000025274000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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] d_instantiate+0x64/0xa0 fs/dcache.c:1893 alloc_path_pseudo fs/file_table.c:341 [inline] alloc_file_pseudo+0x19e/0x290 fs/file_table.c:353 __anon_inode_getfile fs/anon_inodes.c:109 [inline] __anon_inode_getfd fs/anon_inodes.c:234 [inline] anon_inode_getfd+0xce/0x1e0 fs/anon_inodes.c:269 bpf_prog_load+0x1917/0x20f0 kernel/bpf/syscall.c:2876 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5649 __do_sys_bpf kernel/bpf/syscall.c:5756 [inline] __se_sys_bpf kernel/bpf/syscall.c:5754 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5754 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a3f97dff9 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:00007f2a406eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2a3fb36058 RCX: 00007f2a3f97dff9 RDX: 0000000000000048 RSI: 000000002000e000 RDI: 0000000000000005 RBP: 00007f2a3f9f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f2a3fb36058 R15: 00007fff86694588 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6940 Comm: syz.4.550 Not tainted 6.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4309 [inline] RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4339 [inline] RIP: 0010:lockdep_hardirqs_on_prepare+0x2a0/0x780 kernel/locking/lockdep.c:4406 Code: 8b 7c 24 10 48 89 de e8 5e b1 00 00 48 ba 00 00 00 00 00 fc ff df 85 c0 0f 84 9d 01 00 00 49 ff c5 41 0f b6 04 17 84 c0 75 33 <49> 63 06 48 83 c3 28 49 83 c4 28 49 39 c5 7c 95 eb 60 44 89 e1 80 RSP: 0018:ffffc90000a18cc0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8880323c2908 RCX: ffffffff8170ce0a RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff942c9838 RBP: ffffc90000a18d78 R08: ffffffff942c983f R09: 1ffffffff2859307 R10: dffffc0000000000 R11: fffffbfff2859308 R12: ffff8880323c2928 R13: 0000000000000002 R14: ffff8880323c28d8 R15: 1ffff1100647851b FS: 000055557ac84500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c33bab0 CR3: 0000000026f16000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 irqentry_exit+0x63/0x90 kernel/entry/common.c:357 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+0x1e3/0x980 kernel/softirq.c:542 Code: 7c 24 70 45 0f b7 e4 48 c7 c7 60 c0 09 8c e8 d4 f3 6e 0a 65 66 c7 05 02 45 ac 7e 00 00 e8 d5 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:ffffc90000a18e40 EFLAGS: 00000286 RAX: 491ec150399fa300 RBX: ffffc90000a18ee0 RCX: ffffffff8170ce0a RDX: dffffc0000000000 RSI: ffffffff8c0acaa0 RDI: ffffffff8c6101e0 RBP: ffffc90000a18f50 R08: ffffffff942c983f R09: 1ffffffff2859307 R10: dffffc0000000000 R11: fffffbfff2859308 R12: 0000000000000200 R13: 0000000000000000 R14: ffffffff8e60a0c0 R15: 1ffff110064783c0 __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+0x88/0x570 kernel/rcu/tree_plugin.h:693 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 14 66 41 c7 44 14 09 f3 f3 41 c6 44 14 0b f3 65 44 8b 3d c9 1d 88 7e 41 f7 c7 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 22 00 00 00 00 66 42 c7 44 22 RSP: 0018:ffffc900159bfc20 EFLAGS: 00000206 RAX: 491ec150399fa300 RBX: 1ffff92002b37f8c RCX: ffffffff8170ce0a RDX: dffffc0000000000 RSI: ffffffff8c0acaa0 RDI: ffffffff8c6101e0 RBP: ffffc900159bfd00 R08: ffffffff942c983f R09: 1ffffffff2859307 R10: dffffc0000000000 R11: fffffbfff2859308 R12: 1ffff92002b37f88 R13: ffff8880323c2260 R14: ffffc900159bfc60 R15: 0000000000000000 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:437 dput+0x197/0x2b0 fs/dcache.c:856 __fput+0x5d2/0x880 fs/file_table.c:439 task_work_run+0x24f/0x310 kernel/task_work.c:239 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: 0033:0x7f564db7dff9 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:00007fff93af3e48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000002022d RCX: 00007f564db7dff9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f564dd37a80 R08: 0000000000000001 R09: 00007fff93af413f R10: 00007f564da00000 R11: 0000000000000246 R12: 000000000002044e R13: 00007fff93af3f50 R14: 0000000000000032 R15: ffffffffffffffff