watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.4:6797] Modules linked in: irq event stamp: 3453261 hardirqs last enabled at (3453260): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (3453261): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (3394482): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (3394485): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 6797 Comm: syz-executor.4 Not tainted 6.13.0-rc1-next-20241205 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address+0x5b/0xa0 Code: db 88 72 03 48 b8 00 00 00 00 00 fc ff df 48 8d 6b 58 48 89 ea 48 c1 ea 03 80 3c 02 00 75 36 48 8b 7b 58 e8 f7 86 0d 00 85 c0 <74> cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 RSP: 0018:ffff88806ce09660 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88806ce09678 RCX: 0000000000000001 RDX: 1ffff1100d9c12da RSI: ffff88800f5ef6d8 RDI: ffffffff818be080 RBP: ffff88806ce096d0 R08: 0000000000000001 R09: ffff88806ce096b8 R10: 000000000003c001 R11: 00000000000225f0 R12: ffff88806ce09740 R13: 0000000000000000 R14: ffff8880160b0000 R15: 0000000000082820 FS: 00007fa6f172e700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b61dc0b280 CR3: 0000000016644000 CR4: 0000000000350ef0 Call Trace: 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 kmalloc_reserve+0x189/0x2b0 __alloc_skb+0x162/0x370 __netdev_alloc_skb+0x7a/0x7c0 __ieee80211_beacon_get+0x3f4/0xfc0 ieee80211_beacon_get_tim+0xa6/0x280 mac80211_hwsim_beacon_tx+0x49b/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa80 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 f4 ac ab ff 4d 85 ed 74 06 e8 1a 75 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:ffff88800f5ef6d0 EFLAGS: 00000246 RAX: 000000000030221d RBX: ffffea00006c51c0 RCX: 1ffffffff0fe04c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff818477d6 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fde3e9 R10: ffffffff87ef1f4f R11: 0000000000000000 R12: ffff88806ce40390 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88801b147de0 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x300/0x3d0 proc_net_ns_init+0x42/0x410 ops_init+0x1e1/0x650 setup_net+0x1d7/0x7a0 copy_net_ns+0x2e3/0x6f0 create_new_namespaces+0x3f6/0xaf0 copy_namespaces+0x45c/0x580 copy_process+0x26c0/0x70e0 kernel_clone+0xeb/0x850 __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa6f41b8b19 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:00007fa6f172e188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fa6f42cbf60 RCX: 00007fa6f41b8b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007fa6f4212f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2182bbef R14: 00007fa6f172e300 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: 88 72 03 mov %dh,0x3(%rdx) 3: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax a: fc ff df d: 48 8d 6b 58 lea 0x58(%rbx),%rbp 11: 48 89 ea mov %rbp,%rdx 14: 48 c1 ea 03 shr $0x3,%rdx 18: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 1c: 75 36 jne 0x54 1e: 48 8b 7b 58 mov 0x58(%rbx),%rdi 22: e8 f7 86 0d 00 callq 0xd871e 27: 85 c0 test %eax,%eax * 29: 74 cf je 0xfffffffa <-- trapping instruction 2b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 32: fc ff df 35: 48 89 ea mov %rbp,%rdx 38: 48 c1 ea 03 shr $0x3,%rdx 3c: 80 .byte 0x80 3d: 3c 02 cmp $0x2,%al