loop1: detected capacity change from 0 to 8 I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.7:8864] Modules linked in: irq event stamp: 6871273 hardirqs last enabled at (6871272): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (6871273): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (6822854): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (6822857): [] __irq_exit_rcu+0xcc/0x110 CPU: 1 PID: 8864 Comm: syz-executor.7 Not tainted 6.2.0-next-20230227 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__read_once_word_nocheck+0x3/0x10 Code: ff e8 01 e1 6c 00 e9 37 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 9c 61 37 03 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffff88806cf095f0 EFLAGS: 00000202 RAX: 1ffff11008bb0fb2 RBX: 0000000000000001 RCX: 0000000000000001 RDX: ffff888045d87d01 RSI: ffff888045d87d60 RDI: ffff888045d87d60 RBP: ffff88806cf096c0 R08: 0000000000000001 R09: ffff88806cf096a8 R10: 0000000000038001 R11: 0000000000000000 R12: ffff88806cf096c8 R13: ffff88806cf09668 R14: ffff888045d87d60 R15: 0000000000000001 FS: 00007fa2b3689700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555583cc58 CR3: 0000000043e9e000 CR4: 0000000000350ee0 Call Trace: unwind_next_frame+0x1584/0x22d0 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_node+0x187/0x330 kmalloc_reserve+0x16d/0x230 __alloc_skb+0x129/0x330 skb_copy+0x13d/0x3f0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb08/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:qlist_free_all+0x36/0x1a0 Code: 41 57 41 56 41 55 49 89 fd 41 54 49 bc 00 00 00 00 00 fc ff df 55 48 89 f5 53 48 83 ec 08 eb 4d 49 63 86 c0 00 00 00 49 8b 18 <4c> 89 f7 49 29 c0 4c 89 c6 4d 89 c7 e8 f9 f0 ff ff 48 89 c1 0f 1f RSP: 0018:ffff888045d875a0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff88803623bc00 RCX: ffffea0000368601 RDX: ffffea0000368600 RSI: 0000000000000000 RDI: ffffffff817f6eb3 RBP: 0000000000000000 R08: ffff88800da1b800 R09: ffffffff8777f94f R10: fffffbfff0eeff29 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888045d875e0 R14: ffff888008441dc0 R15: ffff888045ba9800 kasan_quarantine_reduce+0x196/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc+0x172/0x320 __create_object+0x3c/0xc90 kmem_cache_alloc+0x204/0x320 __proc_create+0x2b3/0x8b0 proc_create_reg+0xb6/0x180 proc_create_seq_private+0x90/0x180 dev_proc_net_init+0xa8/0x1c0 ops_init+0xbb/0x6b0 setup_net+0x3d9/0x990 copy_net_ns+0x321/0x770 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x414/0x500 copy_process+0x2a5e/0x7390 kernel_clone+0xeb/0x8c0 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fa2b6113b19 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:00007fa2b3689188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fa2b6226f60 RCX: 00007fa2b6113b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007fa2b616df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6247f16f R14: 00007fa2b3689300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.2.0-next-20230227 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xc50 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 d5 09 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 3e 1f 00 00 f3 90 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e4 00 00 RSP: 0018:ffff88806ce09a28 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff844a600b RDX: fffffbfff0b4ad85 RSI: 0000000000000004 RDI: ffffffff85a56c20 RBP: ffffffff85a56c20 R08: 0000000000000000 R09: ffffffff85a56c23 R10: fffffbfff0b4ad84 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0b4ad84 R14: 0000000000000001 R15: 1ffff1100d9c1346 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ad4ad85160 CR3: 000000000fd1c000 CR4: 0000000000350ef0 Call Trace: do_raw_spin_lock+0x1e0/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6de/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d e3 15 3a 00 fb f4 e9 5f 13 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffffff85407e38 EFLAGS: 00000206 RAX: 000000000033fcaf RBX: ffffffff8542a840 RCX: ffffffff84485c3e RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812847a0 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88806ce34f83 R10: ffffed100d9c69f0 R11: 0000000000000001 R12: fffffbfff0a85508 R13: ffffffff85d27c90 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x67/0xa0 do_idle+0x300/0x3d0 cpu_startup_entry+0x18/0x20 rest_init+0x166/0x290 arch_call_rest_init+0x13/0x40 start_kernel+0x372/0x530 secondary_startup_64_no_verify+0xe0/0xeb ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 01 e1 6c 00 callq 0x6ce106 5: e9 37 fd ff ff jmpq 0xfffffd41 a: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 11: 00 00 00 14: 66 90 xchg %ax,%ax 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 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: 48 8b 07 mov (%rdi),%rax * 29: e9 9c 61 37 03 jmpq 0x33761ca <-- trapping instruction 2e: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 35: 00 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop