watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz-executor.0:4982] Modules linked in: irq event stamp: 4781011 hardirqs last enabled at (4781010): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (4781011): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (4767056): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (4767061): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 4982 Comm: syz-executor.0 Not tainted 6.12.0-rc7-next-20241115 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__kernel_text_address+0xf/0x40 Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 48 89 fb e8 23 ff ff ff 85 c0 <75> 1b 48 81 fb 00 b0 d5 86 72 0c 31 c0 48 81 fb 7a ac eb 86 0f 92 RSP: 0018:ffff88806ce09620 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff839396a3 RCX: 0000000000000001 RDX: 1ffff1100d9c12d4 RSI: ffff88803fe5f900 RDI: ffffffff839396a3 RBP: ffff88806ce096a0 R08: 0000000000000001 R09: ffff88806ce09688 R10: 000000000003c001 R11: 00000000000963ee R12: ffff88806ce09710 R13: 0000000000000000 R14: ffff888009848000 R15: 0000000000000820 FS: 00007f5369655700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f42a7aec650 CR3: 0000000015350000 CR4: 0000000000350ef0 Call Trace: unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_node_noprof+0x14c/0x3e0 __alloc_skb+0x2ad/0x370 skb_copy+0x1d5/0x3b0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xafb/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa70 hrtimer_run_softirq+0x14c/0x310 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 14 9a ab ff 4d 85 ed 74 06 e8 8a 62 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:ffff88803fe5f0f0 EFLAGS: 00000246 RAX: 000000000048bd53 RBX: ffffea0000375e40 RCX: 1ffffffff0fdfeb6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81849d96 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fdddf1 R10: ffffffff87eeef8f R11: 0000000000000000 R12: ffff88806ce40350 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800dd796f0 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 device_add+0x680/0x17f0 netdev_register_kobject+0x182/0x3b0 register_netdevice+0x1332/0x1ab0 register_netdev+0x31/0x60 sit_init_net+0x28b/0x5c0 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: 0033:0x7f536c0dfb19 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:00007f5369655188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f536c1f2f60 RCX: 00007f536c0dfb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f536c139f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe071c7bdf R14: 00007f5369655300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 266 Comm: syz-fuzzer Not tainted 6.12.0-rc7-next-20241115 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x242/0xb60 Code: 02 48 89 e8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 85 08 00 00 b8 01 00 00 00 66 89 45 00 e9 bf fe ff ff 89 44 24 38 f3 90 5b fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 RSP: 0000:ffff888016a2f928 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8486d2bf RDX: fffffbfff0c1b869 RSI: 0000000000000004 RDI: ffffffff860dc340 RBP: ffffffff860dc340 R08: 0000000000000000 R09: fffffbfff0c1b868 R10: ffffffff860dc343 R11: 5050505001000011 R12: 1ffff11002d45f26 R13: 0000000000000003 R14: fffffbfff0c1b868 R15: ffff888016a2f960 FS: 000000c000030b10(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff3849421eb CR3: 000000000d24c000 CR4: 0000000000350ef0 Call Trace: do_raw_spin_lock+0x1de/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6d1/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa70 hrtimer_run_softirq+0x14c/0x310 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x39/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0033:0x4148f4 Code: 50 00 00 00 00 48 89 4c 24 58 48 c7 44 24 60 00 00 00 00 48 8b 6c 24 28 48 83 c4 30 c3 48 8b 1d a2 47 b3 01 84 03 48 8b 14 d3 <48> 85 d2 74 1d 48 89 c3 48 c1 e8 0d 48 25 ff 1f 00 00 48 8b 8c c2 RSP: 002b:000000c00031bde8 EFLAGS: 00000246 RAX: 00000000013695c0 RBX: 00007ff38f643000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 0000000000006d18 RDI: 0000000000000003 RBP: 000000c00031be10 R08: 00000000013695c0 R09: 0000000000000044 R10: 0000000001f21248 R11: 000000000000006e R12: 0000000000000003 R13: 000000c00030ea80 R14: 000000521d8173c1 R15: 00000000000028eb Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout ---------------- Code disassembly (best guess): 0: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 7: 00 00 00 a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 66 0f 1f 00 nopw (%rax) 1f: 53 push %rbx 20: 48 89 fb mov %rdi,%rbx 23: e8 23 ff ff ff callq 0xffffff4b 28: 85 c0 test %eax,%eax * 2a: 75 1b jne 0x47 <-- trapping instruction 2c: 48 81 fb 00 b0 d5 86 cmp $0xffffffff86d5b000,%rbx 33: 72 0c jb 0x41 35: 31 c0 xor %eax,%eax 37: 48 81 fb 7a ac eb 86 cmp $0xffffffff86ebac7a,%rbx 3e: 0f .byte 0xf 3f: 92 xchg %eax,%edx