RBP: 00007fc56b5241d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcd46be17f R14: 00007fc56b524300 R15: 0000000000022000 sysctl could not get directory: /kernel -12 watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.4:45562] Modules linked in: irq event stamp: 4554363 hardirqs last enabled at (4554362): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (4554363): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (4488180): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (4488183): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 45562 Comm: syz-executor.4 Not tainted 6.18.0-rc1-next-20251017 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 48 fe 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 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 1a fe ff ff RSP: 0018:ffff88806ce082f0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a170f RDX: ffff8880524c9b80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88806ce313e8 R09: ffffe8ffffc19168 R10: 0000000000000000 R11: 0000000000004485 R12: 0000000000000102 R13: 000000000000002c R14: ffff88806ce313e8 R15: dffffc0000000000 FS: 00007f2d343f5700(0000) GS:ffff8880e53f9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff4d773ff8 CR3: 0000000054d89000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: tracing_gen_ctx_irq_test+0x52/0x1f0 perf_trace_buf_update+0x37/0x190 perf_tp_event+0x107/0xe70 perf_trace_run_bpf_submit+0xef/0x180 perf_trace_lock+0x337/0x5d0 lock_release+0x1ab/0x290 unwind_next_frame+0x3b7/0x2540 __unwind_start+0x517/0x7c0 arch_stack_walk+0x62/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x43/0x70 kmem_cache_free+0x2a4/0x540 kfree_skbmem+0x18a/0x1f0 consume_skb+0xdd/0x160 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x53f/0x940 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x1b0 __hrtimer_run_queues+0x1ee/0xac0 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:strlen+0x6d/0xa0 Code: 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 27 80 38 00 75 de 48 83 c4 08 48 29 e8 5b <5d> e9 5d 64 0a 00 48 83 c4 08 31 c0 5b 5d e9 50 64 0a 00 e8 8b 11 RSP: 0018:ffff888054b272b0 EFLAGS: 00000202 RAX: 000000000000000d RBX: 1ffff1100a964e5e RCX: 0000000000000005 RDX: 0000000000000006 RSI: ffffffff85e1dca0 RDI: ffffffff84e95400 RBP: ffffffff84e95400 R08: ffffffff86aade16 R09: ffff888054b274a0 R10: 000000000003c76e R11: 0000000000026196 R12: ffffffff85d24840 R13: ffffffff85e1dcb8 R14: ffff888054b27370 R15: ffff888054b27460 perf_trace_lock+0xb5/0x5d0 lock_release+0x1ab/0x290 unwind_next_frame+0x3b7/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 set_track_prepare+0x35/0x70 __alloc_object+0xf0/0x2c0 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x42f/0x690 __proc_create+0x306/0x920 proc_create_reg+0xb6/0x180 proc_create_net_single+0x87/0x180 ipv6_proc_init_net+0xa3/0x1f0 ops_init+0x1e1/0x650 setup_net+0xfd/0x310 copy_net_ns+0x2fb/0x690 create_new_namespaces+0x3f6/0xab0 copy_namespaces+0x45c/0x580 copy_process+0x26d4/0x7410 kernel_clone+0xea/0x7f0 __do_sys_clone3+0x1f5/0x280 do_syscall_64+0xbf/0x390 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2d36e7fb19 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:00007f2d343f5188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f2d36f92f60 RCX: 00007f2d36e7fb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880 RBP: 00007f2d36ed9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd14ad0cf R14: 00007f2d343f5300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.18.0-rc1-next-20251017 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:pv_native_safe_halt+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d 59 e6 20 00 0f 1f 44 00 00 fb f4 ed 8b 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 RSP: 0018:ffff8880096efe58 EFLAGS: 00000206 RAX: 0000000000663deb RBX: 0000000000000001 RCX: ffffffff84c4ac97 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814cbdd0 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e630a R10: ffff88806cf31853 R11: 0000000000000001 R12: ffffffff86645d50 R13: 1ffff110012ddfd2 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880e54f9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fdb782f618 CR3: 000000000e381000 CR4: 0000000000350ef0 Call Trace: default_idle+0xe/0x20 default_idle_call+0x6c/0xb0 do_idle+0x340/0x490 cpu_startup_entry+0x4f/0x60 start_secondary+0x1bd/0x210 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: 0c 24 or $0x24,%al 2: 0f b7 d6 movzwl %si,%edx 5: 0f b7 f7 movzwl %di,%esi 8: bf 03 00 00 00 mov $0x3,%edi d: e9 48 fe ff ff jmpq 0xfffffe5a 12: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 19: 00 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: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 8b 0c 24 mov (%rsp),%rcx 32: 89 f2 mov %esi,%edx 34: 89 fe mov %edi,%esi 36: bf 05 00 00 00 mov $0x5,%edi 3b: e9 1a fe ff ff jmpq 0xfffffe5a