watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:10269] Modules linked in: irq event stamp: 2223057 hardirqs last enabled at (2223056): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2223057): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2214340): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2214359): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 10269 Comm: syz-executor.2 Not tainted 6.13.0-rc3-next-20241219 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x49c/0x2490 Code: c7 c1 80 d9 ac 85 48 ba 00 00 00 00 00 fc ff df 48 8d 41 05 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 c6 83 e6 07 40 38 f2 7f 08 <84> d2 0f 85 16 17 00 00 0f b6 51 05 83 e2 07 0f 84 51 fe ff ff 80 RSP: 0018:ffff88806ce09648 EFLAGS: 00000297 RAX: ffffffff86839c8f RBX: 0000000000000002 RCX: ffffffff86839c8a RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffffffff864c4664 RBP: ffff88806ce09710 R08: ffffffff86839c8a R09: ffff88806ce096f8 R10: 000000000003aa65 R11: 0000000000022aff R12: ffff88806ce09718 R13: ffff88806ce09700 R14: ffff88806ce096f9 R15: ffff88806ce096b8 FS: 00007f7bcc46e700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555626d0708 CR3: 0000000016bf8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x87/0xf0 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 __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 14 de ab ff 4d 85 ed 74 06 e8 7a 5d 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:ffff88803f0f7680 EFLAGS: 00000282 RAX: 000000000021c9d5 RBX: ffffea00002a06c0 RCX: 1ffffffff0fe1d0a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81a45d06 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fdfbe1 R10: ffffffff87efdf0f R11: 0000000000000000 R12: ffff88806ce40390 R13: 0000000000000200 R14: ffffea0000c4a540 R15: ffff88800a81b6f0 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 __kmalloc_noprof+0x37e/0x4b0 security_sk_alloc+0x101/0x160 sk_prot_alloc+0x20b/0x280 sk_alloc+0x34/0xb50 tun_chr_open+0x80/0x5f0 misc_open+0x31e/0x420 chrdev_open+0x235/0x690 do_dentry_open+0x71c/0x1420 vfs_open+0x82/0x3f0 path_openat+0x1cfa/0x2990 do_filp_open+0x1e9/0x450 do_sys_openat2+0x164/0x1d0 __x64_sys_openat+0x143/0x200 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7bceef8b19 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:00007f7bcc46e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7bcf00bf60 RCX: 00007f7bceef8b19 RDX: 0000000000000200 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f7bcef52f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff782b66df R14: 00007f7bcc46e300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 loop0: detected capacity change from 0 to 128 loop0: detected capacity change from 0 to 128 ---------------- Code disassembly (best guess): 0: c7 c1 80 d9 ac 85 mov $0x85acd980,%ecx 6: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx d: fc ff df 10: 48 8d 41 05 lea 0x5(%rcx),%rax 14: 48 89 c6 mov %rax,%rsi 17: 48 c1 ee 03 shr $0x3,%rsi 1b: 0f b6 14 16 movzbl (%rsi,%rdx,1),%edx 1f: 48 89 c6 mov %rax,%rsi 22: 83 e6 07 and $0x7,%esi 25: 40 38 f2 cmp %sil,%dl 28: 7f 08 jg 0x32 * 2a: 84 d2 test %dl,%dl <-- trapping instruction 2c: 0f 85 16 17 00 00 jne 0x1748 32: 0f b6 51 05 movzbl 0x5(%rcx),%edx 36: 83 e2 07 and $0x7,%edx 39: 0f 84 51 fe ff ff je 0xfffffe90 3f: 80 .byte 0x80