watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.2:12987] Modules linked in: irq event stamp: 2822093 hardirqs last enabled at (2822092): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2822093): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2732396): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2732399): [] irq_exit_rcu+0x94/0xc0 CPU: 1 UID: 0 PID: 12987 Comm: syz-executor.2 Not tainted 6.12.0-rc3-next-20241016 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x71/0x2490 Code: 00 00 00 fc ff df 49 8d 6f 58 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 07 1a 00 00 49 8b 47 58 4d 8d 6f 48 4c 89 ea 48 89 04 24 <48> c1 ea 03 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 d3 19 RSP: 0018:ffff88806cf09788 EFLAGS: 00000246 RAX: ffffffff813fd29c RBX: 0000000000000002 RCX: 0000000000000001 RDX: ffff88806cf09840 RSI: ffffffff813fd29c RDI: ffff88806cf097f8 RBP: ffff88806cf09850 R08: 0000000000000001 R09: ffff88806cf09838 R10: 000000000003c001 R11: 000000000001294e R12: ffff88806cf098c0 R13: ffff88806cf09840 R14: ffff888017a81b80 R15: ffff88806cf097f8 FS: 00007f22ab993700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555607f6c58 CR3: 0000000017aa4000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 set_track_prepare+0x36/0x70 __alloc_object+0xf4/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_node_noprof+0x311/0x3e0 kmalloc_reserve+0x189/0x2b0 __alloc_skb+0x162/0x370 __netdev_alloc_skb+0x7a/0x7a0 __ieee80211_beacon_get+0x3f4/0xfc0 ieee80211_beacon_get_tim+0xa6/0x280 mac80211_hwsim_beacon_tx+0x49b/0x950 __iterate_interfaces+0x2cb/0x5d0 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+0x94/0xc0 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 b4 ff ab ff 4d 85 ed 74 06 e8 ca 7f 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:ffff88803019f620 EFLAGS: 00000246 RAX: 00000000002857f3 RBX: ffffea0000326f00 RCX: 1ffffffff0fdca53 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8183f876 RBP: ffff888008c41c80 R08: 0000000000000001 R09: fffffbfff0fda9d9 R10: ffffffff87ed4ecf R11: 0000000000000000 R12: ffff88806cf3f590 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800c9bfc00 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19c/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_lru_noprof+0x303/0x3c0 alloc_inode+0x17d/0x240 path_from_stashed+0x554/0x1040 ns_get_path+0x60/0x90 proc_ns_get_link+0x10e/0x240 step_into+0x199e/0x1ff0 path_openat+0x549/0x2980 do_filp_open+0x1b8/0x410 do_sys_openat2+0x164/0x1d0 __x64_sys_openat+0x143/0x200 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f22ae3d0a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f22ab9930b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f22ae530f60 RCX: 00007f22ae3d0a04 RDX: 0000000000000000 RSI: 00007f22ae476f82 RDI: 00000000ffffff9c RBP: 00007f22ae476f82 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffdc246d2bf R14: 00007f22ab993300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: df 49 8d fisttps -0x73(%rcx) 3: 6f outsl %ds:(%rsi),(%dx) 4: 58 pop %rax 5: 48 89 ea mov %rbp,%rdx 8: 48 c1 ea 03 shr $0x3,%rdx c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 10: 0f 85 07 1a 00 00 jne 0x1a1d 16: 49 8b 47 58 mov 0x58(%r15),%rax 1a: 4d 8d 6f 48 lea 0x48(%r15),%r13 1e: 4c 89 ea mov %r13,%rdx 21: 48 89 04 24 mov %rax,(%rsp) * 25: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction 29: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 30: fc ff df 33: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 37: 0f .byte 0xf 38: 85 d3 test %edx,%ebx 3a: 19 .byte 0x19