RBP: 00007f82d9bbf090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f82d9bbf128 R14: 00007ffce711a320 R15: 00007ffce711a408 watchdog: BUG: soft lockup - CPU#0 stuck for 266s! [syz.3.876:3975] Modules linked in: CPU: 0 PID: 3975 Comm: syz.3.876 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline] RIP: 0010:handle_softirqs+0x10d/0x560 kernel/softirq.c:571 Code: 08 85 e8 a6 c5 6f 03 65 66 c7 05 9c 40 c4 7e 00 00 48 c7 c7 60 2c 08 85 e8 90 c5 6f 03 65 44 89 35 a0 42 c3 7e fb 44 89 75 a4 ff ff ff ff 0f bc 45 a4 41 89 c5 41 ff c5 0f 85 c0 00 00 00 48 RSP: 0018:ffffc90000007f38 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88813f6d0282 RCX: 3d527956adac9700 RDX: 1ffffffff0e18a00 RSI: ffffffff85082c60 RDI: ffffffff85638d80 RBP: ffffc90000007fc0 R08: ffffffff870c5008 R09: ffffffff870c5018 R10: ffffffff870c5003 R11: 1ffffffff0e18a00 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000282 R15: 000000000000000a FS: 00007f82d836f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000001 CR3: 0000000115c70000 CR4: 00000000003506b0 DR0: fffffffffffffffc DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000010602 Call Trace: __do_softirq kernel/softirq.c:621 [inline] invoke_softirq kernel/softirq.c:443 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670 irq_exit_rcu+0x9/0x10 kernel/softirq.c:682 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:preempt_schedule_irq+0xa5/0x120 kernel/sched/core.c:6942 Code: 44 24 20 00 02 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 4d bf 01 00 00 00 e8 21 8d 94 fc fb bf 01 00 00 00 76 e4 ff ff fa bf 01 00 00 00 e8 bb 8e 94 fc 65 48 8b 1d 13 37 RSP: 0018:ffffc90000dafa00 EFLAGS: 00000246 RAX: 1ffff11027eda646 RBX: ffffc90000dafac8 RCX: ffffffff870ccf00 RDX: 1ffffffff0e18a00 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000dafa78 R08: ffffffff870c5008 R09: ffffffff870c5018 R10: ffffffff870c5003 R11: 1ffffffff0e18a00 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920001b5f40 irqentry_exit_cond_resched+0x29/0x30 kernel/entry/common.c:398 irqentry_exit+0x37/0x40 kernel/entry/common.c:432 sysvec_apic_timer_interrupt+0x64/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:214 Code: 2c 8b 91 38 0b 00 00 83 fa 02 75 21 48 8b 91 40 0b 00 00 48 8b 32 48 8d 7e 01 8b 89 3c 0b 00 00 48 39 cf 73 08 48 89 44 f2 08 <48> 89 3a 5d c3 66 90 55 48 89 e5 48 8b 45 08 65 48 8b 0d 70 a5 98 RSP: 0018:ffffc90000dafb70 EFLAGS: 00000283 RAX: ffffffff81419198 RBX: 1ffff11027eda601 RCX: 0000000000080000 RDX: ffffc90002b81000 RSI: 000000000000d412 RDI: 000000000000d413 RBP: ffffc90000dafb70 R08: ffff88813f6d2787 R09: 1ffff11027eda4f0 R10: dffffc0000000000 R11: ffffed1027eda4f1 R12: 0000000000000002 R13: 1ffff920001b5f74 R14: ffff88813f6d2780 R15: ffff88813f6d3008 signal_delivered kernel/signal.c:2953 [inline] signal_setup_done+0x318/0x480 kernel/signal.c:2963 handle_signal arch/x86/kernel/signal.c:842 [inline] arch_do_signal_or_restart+0xd49/0x1100 arch/x86/kernel/signal.c:869 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f82d99566d0 Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d aa 2c 07 00 e8 65 65 f9 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48 RSP: 002b:00007f82d836eb38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007f82d9bbf098 RCX: 00007f82d9937159 RDX: 00007f82d836eb40 RSI: 00007f82d836ec70 RDI: 0000000000000021 RBP: 00007f82d9bbf090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f82d9bbf128 R14: 00007ffce711a320 R15: 00007ffce711a408 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:729