watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.3:8604] Modules linked in: irq event stamp: 2403689 hardirqs last enabled at (2403688): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2403689): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2402730): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2402787): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 8604 Comm: syz-executor.3 Not tainted 6.12.0-next-20241120 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x369/0x2490 Code: ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e f7 16 00 00 41 c7 07 00 00 00 00 31 c0 48 83 c4 38 5b 5d 41 5c <41> 5d 41 5e 41 5f e9 1c 65 72 03 48 81 f9 00 a0 d5 86 0f 83 cb 02 RSP: 0018:ffff88806ce09708 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffffffff813f2420 RCX: 0000000000000001 RDX: ffff88803ebbf978 RSI: ffff88803ebbf940 RDI: ffff88806ce09738 RBP: ffff88806ce097c0 R08: 0000000000000001 R09: ffff88806ce09768 R10: 000000000003c001 R11: 00000000000964fa R12: ffff88806ce097f0 R13: ffff88806ce09770 R14: ffff88803ebbf940 R15: ffff88806ce09728 FS: 00007f6ba7023700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ba70029d0 CR3: 000000003deaa000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_mempool_unpoison_object+0x11e/0x1e0 napi_skb_cache_get+0x289/0x740 __napi_build_skb+0x15/0x60 napi_build_skb+0x20/0x310 e1000_clean_rx_irq+0x986/0x11a0 e1000_clean+0x960/0x2540 __napi_poll+0xb9/0x540 net_rx_action+0xa08/0xe00 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x10a/0x1b0 Code: 24 28 75 5b 49 c7 44 24 28 00 00 00 00 4c 89 e7 48 8d 35 00 00 00 00 e8 44 92 ab ff 4d 85 ed 74 06 e8 6a 5f d5 ff fb 4d 85 f6 <74> 1c 5b 4c 89 f6 48 89 ef 5d 41 5c 41 5d 41 5e e9 c1 fa ff ff 44 RSP: 0018:ffff88803ebbf020 EFLAGS: 00000246 RAX: 000000000024a9e1 RBX: ffffea0000317e80 RCX: 1ffffffff0fdfacf RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8184a686 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fdd9f1 R10: ffffffff87eecf8f R11: 0000000000000000 R12: ffff88806ce40350 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800c5fa818 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __kernfs_new_node+0xd4/0x850 kernfs_new_node+0x18b/0x250 __kernfs_create_file+0x55/0x360 sysfs_add_file_mode_ns+0x21c/0x440 internal_create_group+0x573/0xeb0 internal_create_groups.part.0+0x90/0x140 sysfs_create_groups+0x29/0x50 kobject_add_internal+0x29b/0x9a0 kobject_init_and_add+0x101/0x170 net_rx_queue_update_kobjects+0x279/0x570 netdev_register_kobject+0x26c/0x3b0 register_netdevice+0x1332/0x1ab0 register_netdev+0x31/0x60 loopback_net_init+0x7a/0x180 ops_init+0x1e1/0x650 setup_net+0x1d7/0x7a0 copy_net_ns+0x2e3/0x6f0 create_new_namespaces+0x3f6/0xaf0 copy_namespaces+0x45c/0x580 copy_process+0x2704/0x8e90 kernel_clone+0xeb/0x850 __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6ba9aceb19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6ba7023188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f6ba9be2020 RCX: 00007f6ba9aceb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f6ba9b28f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff586f019f R14: 00007f6ba7023300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 4c 89 fa fisttps -0x6(%rcx,%rcx,4) 4: 48 c1 ea 03 shr $0x3,%rdx 8: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax c: 84 c0 test %al,%al e: 74 08 je 0x18 10: 3c 03 cmp $0x3,%al 12: 0f 8e f7 16 00 00 jle 0x170f 18: 41 c7 07 00 00 00 00 movl $0x0,(%r15) 1f: 31 c0 xor %eax,%eax 21: 48 83 c4 38 add $0x38,%rsp 25: 5b pop %rbx 26: 5d pop %rbp 27: 41 5c pop %r12 * 29: 41 5d pop %r13 <-- trapping instruction 2b: 41 5e pop %r14 2d: 41 5f pop %r15 2f: e9 1c 65 72 03 jmpq 0x3726550 34: 48 81 f9 00 a0 d5 86 cmp $0xffffffff86d5a000,%rcx 3b: 0f .byte 0xf 3c: 83 cb 02 or $0x2,%ebx