Buffer I/O error on dev sr0, logical block 4, async page read Buffer I/O error on dev sr0, logical block 5, async page read Buffer I/O error on dev sr0, logical block 6, async page read Buffer I/O error on dev sr0, logical block 7, async page read watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.6:4633] Modules linked in: irq event stamp: 25520479 hardirqs last enabled at (25520478): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (25520479): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (25485872): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (25485875): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4633 Comm: syz-executor.6 Not tainted 5.10.237 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:mac80211_hwsim_monitor_rx+0x2/0x810 drivers/net/wireless/mac80211_hwsim.c:949 Code: e8 23 3e a3 fe e9 5b fd ff ff e8 79 03 1e 01 48 c7 c7 90 87 67 85 e8 0d 3e a3 fe e9 53 ff ff ff 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 41 54 55 48 89 f5 53 48 89 fb 48 83 ec 10 48 89 14 24 RSP: 0018:ffff88806cf09ce8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82ca0517 RDX: ffff888048c6b3f0 RSI: ffff88804573f640 RDI: ffff888048c68d00 RBP: ffff888048c68d00 R08: 0000000000000000 R09: ffff888048c68d5f R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804573f640 R13: ffff888048c6b3f0 R14: 0000000000000000 R15: ffff888048c68d50 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005607121e32c0 CR3: 000000000b3a4000 CR4: 0000000000350ee0 Call Trace: mac80211_hwsim_tx_frame+0xd2/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1711 mac80211_hwsim_beacon_tx+0x494/0x940 drivers/net/wireless/mac80211_hwsim.c:1770 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:put_cpu_partial+0xab/0x130 mm/slub.c:2389 Code: 48 89 4b 08 81 e2 ff 7f 00 00 44 29 c2 01 fa 89 53 14 48 8b 55 00 65 48 0f b1 5a 18 48 39 c1 74 25 48 8b 45 00 65 48 8b 70 18 <48> 89 f0 48 85 f6 0f 85 66 ff ff ff be 01 00 00 00 31 ff 31 c9 eb RSP: 0018:ffff888047b7f530 EFLAGS: 00000202 RAX: 000000000003fd90 RBX: ffffea000037fac0 RCX: 000000008010000f RDX: 0000000000000001 RSI: ffffea0000343fc0 RDI: ffff8880083f88c0 RBP: ffff8880083f88c0 R08: 0000000000000000 R09: ffffffff816cc601 R10: ffff88800dfeb000 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff88800dfeb800 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x14b/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:200 alloc_skb include/linux/skbuff.h:1099 [inline] alloc_uevent_skb+0x7b/0x210 lib/kobject_uevent.c:290 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:412 [inline] kobject_uevent_env+0xce1/0xfd0 lib/kobject_uevent.c:608 __kobject_del+0x27c/0x320 lib/kobject.c:625 kobject_cleanup lib/kobject.c:704 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x215/0x270 lib/kobject.c:761 net_rx_queue_update_kobjects+0x375/0x480 net/core/net-sysfs.c:1083 remove_queue_kobjects net/core/net-sysfs.c:1805 [inline] netdev_unregister_kobject+0x157/0x280 net/core/net-sysfs.c:1959 unregister_netdevice_many+0xbb7/0x1490 net/core/dev.c:10779 unregister_netdevice_queue+0x201/0x2c0 net/core/dev.c:10686 unregister_netdevice include/linux/netdevice.h:2897 [inline] __tun_detach+0xfc1/0x12b0 drivers/net/tun.c:697 tun_detach drivers/net/tun.c:713 [inline] tun_chr_close+0xc4/0x250 drivers/net/tun.c:3486 __fput+0x285/0x9f0 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:185 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xb6f/0x2600 kernel/exit.c:860 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2762 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f7b98c7cb19 Code: Unable to access opcode bytes at RIP 0x7f7b98c7caef. RSP: 002b:00007f7b961f2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: fffffffffffffff4 RBX: 00007f7b98d8ff60 RCX: 00007f7b98c7cb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200001c0 RBP: 00007f7b98cd6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe905e5b6f R14: 00007f7b961f2300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess): 0: e8 23 3e a3 fe callq 0xfea33e28 5: e9 5b fd ff ff jmpq 0xfffffd65 a: e8 79 03 1e 01 callq 0x11e0388 f: 48 c7 c7 90 87 67 85 mov $0xffffffff85678790,%rdi 16: e8 0d 3e a3 fe callq 0xfea33e28 1b: e9 53 ff ff ff jmpq 0xffffff73 20: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 27: 00 28: 41 57 push %r15 * 2a: 41 56 push %r14 <-- trapping instruction 2c: 41 55 push %r13 2e: 41 54 push %r12 30: 55 push %rbp 31: 48 89 f5 mov %rsi,%rbp 34: 53 push %rbx 35: 48 89 fb mov %rdi,%rbx 38: 48 83 ec 10 sub $0x10,%rsp 3c: 48 89 14 24 mov %rdx,(%rsp)