watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:13867] Modules linked in: irq event stamp: 5681899 hardirqs last enabled at (5681898): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5681899): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (5642900): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (5642903): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 13867 Comm: syz-executor.4 Not tainted 6.1.0-rc4-next-20221111 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__read_once_word_nocheck+0x3/0x10 Code: e9 8b fd ff ff e8 0d cd 69 00 e9 43 fd ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 5c af 2b 03 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffff88806d009670 EFLAGS: 00000202 RAX: ffff888037967220 RBX: 0000000000000002 RCX: 0000000000000002 RDX: ffff88806d009d01 RSI: ffff88806d009de0 RDI: ffff88806d009de0 RBP: ffff88806d009de0 R08: ffffffff8622a0cc R09: ffffffff8622a0d0 R10: ffffed100da012ec R11: ffff88806d009738 R12: ffff88806d009739 R13: ffff88806d009758 R14: ffff88806d0096f8 R15: 0000000000000001 FS: 00007ffa65b23700(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ed26000 CR3: 00000000189c0000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0x14f9/0x2130 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1b1/0x3e0 __create_object+0x3d/0xc00 kmem_cache_alloc_node+0x25a/0x400 __alloc_skb+0x21a/0x310 __netdev_alloc_skb+0x76/0x3e0 __ieee80211_beacon_get+0x3de/0x1380 ieee80211_beacon_get_tim+0x99/0x4f0 mac80211_hwsim_beacon_tx+0x1d2/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x541/0xb50 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:idr_get_free+0x273/0x910 Code: 02 0f 85 1f 04 00 00 e8 cb e9 20 fd 48 89 eb 48 c1 ed 03 42 0f b6 44 2d 00 48 83 e3 fd 84 c0 74 06 0f 8e 8e 05 00 00 0f b6 0b <4c> 8b 7c 24 08 49 d3 ef 41 83 e7 3f 45 89 fc 4a 8d 7c e3 28 48 89 RSP: 0018:ffff888013a6f040 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88801bf48000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff8427a0d5 RDI: 0000000000000007 RBP: 1ffff110037e9000 R08: 0000000000000007 R09: 0000000000000002 R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000002 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000012 idr_alloc_u32+0x174/0x2d0 idr_alloc_cyclic+0x106/0x230 __kernfs_new_node+0x117/0x8c0 kernfs_new_node+0x97/0x120 __kernfs_create_file+0x55/0x350 sysfs_add_file_mode_ns+0x21c/0x440 internal_create_group+0x322/0xb20 internal_create_groups.part.0+0x90/0x140 sysfs_create_groups+0x29/0x50 kobject_add_internal+0x29b/0x8e0 kobject_init_and_add+0x105/0x160 net_rx_queue_update_kobjects+0x1de/0x490 netdev_register_kobject+0x277/0x3b0 register_netdevice+0xd60/0x1530 register_netdev+0x31/0x60 loopback_net_init+0x77/0x170 ops_init+0xbb/0x680 setup_net+0x40c/0x9d0 copy_net_ns+0x31c/0x760 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x3b7/0x4a0 copy_process+0x29e3/0x7160 kernel_clone+0xeb/0x890 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7ffa685adb19 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:00007ffa65b23188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007ffa686c0f60 RCX: 00007ffa685adb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007ffa68607f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc256965cf R14: 00007ffa65b23300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: e9 8b fd ff ff jmpq 0xfffffd90 5: e8 0d cd 69 00 callq 0x69cd17 a: e9 43 fd ff ff jmpq 0xfffffd52 f: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 16: 00 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 48 8b 07 mov (%rdi),%rax * 2a: e9 5c af 2b 03 jmpq 0x32baf8b <-- trapping instruction 2f: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 36: 00 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop