watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.7:5659] Modules linked in: irq event stamp: 6794153 hardirqs last enabled at (6794152): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (6794153): [] sysvec_apic_timer_interrupt+0xb/0xc0 softirqs last enabled at (6709858): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (6709861): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 5659 Comm: syz-executor.7 Not tainted 5.19.0-rc8-next-20220728 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:stack_trace_consume_entry+0x0/0x160 Code: d6 fe 42 00 e9 a2 fe ff ff e8 cc fe 42 00 e9 38 fe ff ff e8 82 88 e8 02 e8 bd fe 42 00 e9 10 fd ff ff cc cc cc cc cc cc cc cc <48> b8 00 00 00 00 00 fc ff df 55 53 48 89 fb 48 83 c7 10 48 89 fa RSP: 0018:ffff88806ce09a68 EFLAGS: 00000286 RAX: ffffffff81780a7b RBX: ffffffff81356840 RCX: 0000000000000000 RDX: 1ffff1100d9c1359 RSI: ffffffff81780a7b RDI: ffff88806ce09b38 RBP: ffff88806ce09b08 R08: ffffffff85ec3168 R09: ffffffff85ec316c R10: ffff88806ce09ff8 R11: ffff88806ce09ab0 R12: ffff88806ce09b38 R13: 0000000000000000 R14: ffff8880473d5100 R15: ffff888007c4f780 FS: 00007f9e10080700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc503c3c78 CR3: 0000000008f44000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x73/0xf0 stack_trace_save+0x8c/0xc0 kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x108/0x190 kmem_cache_free+0xfb/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c8/0x8d0 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x5/0x20 sysvec_apic_timer_interrupt+0x8e/0xc0 asm_sysvec_apic_timer_interrupt+0x16/0x20 RIP: 0010:strlen+0x1e/0xa0 Code: 3c 24 eb b8 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 80 7d 00 00 74 3d 48 bb RSP: 0018:ffff8880478e70b8 EFLAGS: 00000296 RAX: 0000000000000000 RBX: 1ffff11008f1ce3e RCX: 0000000000000000 RDX: 1ffffffff091d500 RSI: ffffffff854b4760 RDI: ffffffff848ea800 RBP: ffffffff848ea800 R08: 0000000000000000 R09: 0000000000000001 R10: fffffbfff0b5daf2 R11: 0000000000000001 R12: 1ffff11008f1ce23 R13: ffffffff85309260 R14: ffffffff854b4760 R15: ffff8880478e7198 perf_trace_lock_acquire+0xbf/0x530 lock_acquire+0x413/0x530 fs_reclaim_acquire+0x119/0x160 kmem_cache_alloc+0x3b/0x4a0 __create_object.isra.0+0x3d/0xc10 kmem_cache_alloc+0x24b/0x4a0 __kernfs_new_node+0xd4/0x8c0 kernfs_new_node+0x93/0x120 __kernfs_create_file+0x51/0x350 sysfs_add_file_mode_ns+0x218/0x430 internal_create_group+0x322/0xb20 netdev_queue_update_kobjects+0x32e/0x440 netdev_register_kobject+0x2ee/0x3b0 register_netdevice+0xdca/0x1510 register_netdev+0x2d/0x50 sit_init_net+0x354/0xa00 ops_init+0xb2/0x480 setup_net+0x40c/0x9d0 copy_net_ns+0x318/0x760 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x395/0x480 copy_process+0x2ca7/0x6de0 kernel_clone+0xe7/0xa60 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9e12b0ab19 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:00007f9e10080188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f9e12c1df60 RCX: 00007f9e12b0ab19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f9e12b64f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda2b500ef R14: 00007f9e10080300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: fe 42 00 incb 0x0(%rdx) 3: e9 a2 fe ff ff jmpq 0xfffffeaa 8: e8 cc fe 42 00 callq 0x42fed9 d: e9 38 fe ff ff jmpq 0xfffffe4a 12: e8 82 88 e8 02 callq 0x2e88899 17: e8 bd fe 42 00 callq 0x42fed9 1c: e9 10 fd ff ff jmpq 0xfffffd31 21: cc int3 22: cc int3 23: cc int3 24: cc int3 25: cc int3 26: cc int3 27: cc int3 28: cc int3 * 29: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 30: fc ff df 33: 55 push %rbp 34: 53 push %rbx 35: 48 89 fb mov %rdi,%rbx 38: 48 83 c7 10 add $0x10,%rdi 3c: 48 89 fa mov %rdi,%rdx