loop1: detected capacity change from 0 to 512 watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:7332] Modules linked in: irq event stamp: 2740627 hardirqs last enabled at (2740626): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2740627): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2718490): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2718493): [] irq_exit_rcu+0x94/0xc0 CPU: 1 UID: 0 PID: 7332 Comm: syz-executor.0 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:arch_stack_walk+0x69/0xf0 Code: 89 e7 e8 7a 51 77 03 84 c0 74 5b 49 8b 8d 98 00 00 00 4c 89 ea 4c 89 f6 48 8d bd 68 ff ff ff e8 cd 99 07 00 8b 95 68 ff ff ff <85> d2 75 24 eb 36 4c 89 e7 e8 49 51 77 03 84 c0 74 2a 48 8d bd 68 RSP: 0018:ffff88806cf09848 EFLAGS: 00000292 RAX: 1ffff1100d9e1312 RBX: ffffffff813e8f70 RCX: ffff88806cf098e8 RDX: 0000000000000002 RSI: ffff88806cf098e0 RDI: ffff88806cf09858 RBP: ffff88806cf098e0 R08: 0000000000000001 R09: ffff88806cf09888 R10: 000000000003c001 R11: 0000000000003f0d R12: ffff88806cf09910 R13: 0000000000000000 R14: ffff8880371b1b80 R15: ffff88800cd2eb40 FS: 00007fefc4ef6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30b20000 CR3: 000000000cf28000 CR4: 0000000000350ef0 Call Trace: stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 __kasan_record_aux_stack+0x8c/0xa0 __call_rcu_common.constprop.0+0x6a/0xaa0 kmem_cache_free+0x2ae/0x470 kfree_skbmem+0x18a/0x1f0 consume_skb+0xdd/0x160 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __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:lock_acquire.part.0+0xbe/0x320 Code: b6 3c 38 4c 89 d0 83 e0 07 83 c0 03 40 38 f8 7c 09 40 84 ff 0f 85 15 02 00 00 8b bd 3c 0a 00 00 85 ff 0f 85 95 00 00 00 9c 5d 65 ff 05 62 88 d2 7e 6a 00 81 e5 00 02 00 00 4c 89 e7 6a 00 6a RSP: 0018:ffff88803feef5f8 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 1ffff11007fddec2 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8880371b25bc R11: 0000000000000000 R12: ffff88806cf41518 R13: 000000000003fbc8 R14: 0000000000000003 R15: ffffea0000fef200 _raw_spin_trylock+0x46/0x60 free_unref_page+0x34d/0xc40 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19c/0x230 __kasan_slab_alloc+0x49/0x70 __kmalloc_noprof+0x195/0x4b0 apply_wqattrs_prepare+0x107/0xb60 apply_workqueue_attrs_locked+0x64/0xf0 __alloc_workqueue+0x1065/0x1820 alloc_workqueue+0xc8/0x200 loop_configure+0xcd3/0x1220 lo_ioctl+0x8cc/0x18f0 blkdev_ioctl+0x27e/0x6d0 __x64_sys_ioctl+0x1a0/0x210 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fefc79a18d7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007fefc4ef5f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fefc79eb970 RCX: 00007fefc79a18d7 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000007 RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000020000248 R15: 0000000000000003 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 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:hlock_class+0x56/0x130 Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 a0 4e ed 87 e8 52 49 5c 00 48 0f a3 1d aa 58 be 06 <73> 16 48 8d 04 9b 48 8d 04 80 48 8d 04 c5 c0 52 ed 87 5b e9 d2 7a RSP: 0018:ffff88806ce09a50 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000060 RCX: ffffffff812ef5ee RDX: fffffbfff0fda9d6 RSI: 0000000000000008 RDI: ffffffff87ed4ea8 RBP: ffffffff85a2a740 R08: 0000000000000000 R09: fffffbfff0fda9d5 R10: ffffffff87ed4eaf R11: ffff88806ce09ff8 R12: 0000000000000008 R13: ffffffff85a2b180 R14: 0000000000000100 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a3bec70618 CR3: 000000001b6be000 CR4: 0000000000350ef0 Call Trace: mark_lock+0xac/0x1370 __lock_acquire+0x9ca/0x4360 lock_acquire.part.0+0xeb/0x320 _raw_spin_lock+0x2b/0x40 tick_nohz_handler+0x4a5/0x6d0 __hrtimer_run_queues+0x57c/0xa70 hrtimer_interrupt+0x2f2/0x750 __sysvec_apic_timer_interrupt+0xc2/0x390 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+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 69 41 40 00 0f 1f 44 00 00 fb f4 e9 5c 28 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffffff85a07e10 EFLAGS: 00000206 RAX: 00000000000dc3dd RBX: 0000000000000000 RCX: ffffffff848238d7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812ad1ed RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9c6c70 R10: ffff88806ce36383 R11: 0000000000000000 R12: ffffffff863f2748 R13: 1ffffffff0b40fc7 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x6d/0xb0 do_idle+0x2fd/0x3b0 cpu_startup_entry+0x4f/0x60 rest_init+0x164/0x290 start_kernel+0x40d/0x530 x86_64_start_reservations+0x18/0x30 x86_64_start_kernel+0xcb/0xe0 common_startup_64+0x12c/0x138 loop0: detected capacity change from 0 to 512 ---------------- Code disassembly (best guess): 0: 89 e7 mov %esp,%edi 2: e8 7a 51 77 03 callq 0x3775181 7: 84 c0 test %al,%al 9: 74 5b je 0x66 b: 49 8b 8d 98 00 00 00 mov 0x98(%r13),%rcx 12: 4c 89 ea mov %r13,%rdx 15: 4c 89 f6 mov %r14,%rsi 18: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 1f: e8 cd 99 07 00 callq 0x799f1 24: 8b 95 68 ff ff ff mov -0x98(%rbp),%edx * 2a: 85 d2 test %edx,%edx <-- trapping instruction 2c: 75 24 jne 0x52 2e: eb 36 jmp 0x66 30: 4c 89 e7 mov %r12,%rdi 33: e8 49 51 77 03 callq 0x3775181 38: 84 c0 test %al,%al 3a: 74 2a je 0x66 3c: 48 rex.W 3d: 8d .byte 0x8d 3e: bd .byte 0xbd 3f: 68 .byte 0x68