EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.0:5671] Modules linked in: irq event stamp: 7950133 hardirqs last enabled at (7950132): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (7950133): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (7915608): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (7915611): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5671 Comm: syz-executor.0 Not tainted 5.10.147 #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 include/asm-generic/rwonce.h:68 Code: 0a fe ff ff e8 fe 49 5b 00 e9 bf fd ff ff e8 f4 49 5b 00 e9 8c fd ff ff e8 ea 49 5b 00 e9 44 fd ff ff cc cc cc cc cc 48 8b 07 68 c5 0f 03 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 41 55 41 RSP: 0018:ffff88806ce09528 EFLAGS: 00000293 RAX: ffffffff83143431 RBX: ffff88806ce09680 RCX: ffff88806ce09680 RDX: dffffc0000000000 RSI: ffff88804b8bfd30 RDI: ffff88804b8bfd30 RBP: ffff88804b8bfd30 R08: ffffffff85c513c9 R09: ffff88804b8bfd38 R10: 0000000000032042 R11: 1ffff1100d9c12b4 R12: ffff88806ce09638 R13: ffff88804b8b8000 R14: 1ffff1100d9c12b4 R15: ffffffff85c513c8 FS: 00007f7581584700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe482e67718 CR3: 0000000018244000 CR4: 0000000000350ef0 Call Trace: deref_stack_reg+0xf2/0x160 arch/x86/kernel/unwind_orc.c:360 unwind_next_frame+0xbf8/0x1a90 arch/x86/kernel/unwind_orc.c:536 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x360 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x360 mm/slub.c:2909 __skb_ext_alloc+0x19/0x90 net/core/skbuff.c:6223 skb_ext_add+0x508/0x670 net/core/skbuff.c:6318 skb_set_kcov_handle include/linux/skbuff.h:4630 [inline] skb_set_kcov_handle include/linux/skbuff.h:4620 [inline] __alloc_skb+0x3c1/0x620 net/core/skbuff.c:253 skb_copy+0x137/0x2f0 net/core/skbuff.c:1522 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb1d/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1494 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1711 mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1765 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1788 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b 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:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:lock_release+0x3b4/0x6b0 kernel/locking/lockdep.c:5573 Code: 44 24 40 45 39 87 a8 08 00 00 0f 85 cc 01 00 00 b8 ff ff ff ff 65 0f c1 05 d9 87 db 7e 83 f8 01 0f 85 56 01 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 c7 RSP: 0018:ffff88804b8bf660 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 28749a661342ef20 RCX: ffff88804b8bf6b0 RDX: 1ffff11002ed6dd4 RSI: 0000000000000000 RDI: ffff8880176b6ea0 RBP: 1ffff11009717ece R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000003 R14: ffff8880176b6ea8 R15: ffff8880176b6600 percpu_ref_put include/linux/percpu-refcount.h:338 [inline] obj_cgroup_put include/linux/memcontrol.h:518 [inline] memcg_slab_free_hook mm/slab.h:385 [inline] memcg_slab_free_hook mm/slab.h:351 [inline] do_slab_free mm/slub.c:3105 [inline] ___cache_free+0x1de/0x340 mm/slub.c:3156 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] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x360 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x169/0x370 mm/slub.c:2932 __alloc_skb+0x6d/0x620 net/core/skbuff.c:198 alloc_skb include/linux/skbuff.h:1094 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_netconf_notify_devconf+0x84/0x1a0 net/ipv6/addrconf.c:572 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7000 [inline] addrconf_sysctl_unregister+0x131/0x1c0 net/ipv6/addrconf.c:7024 addrconf_ifdown.isra.0+0x1229/0x15f0 net/ipv6/addrconf.c:3880 addrconf_notify+0x159/0x2350 net/ipv6/addrconf.c:3651 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] unregister_netdevice_many+0x852/0x1490 net/core/dev.c:10726 unregister_netdevice_queue+0x201/0x2c0 net/core/dev.c:10660 unregister_netdevice include/linux/netdevice.h:2883 [inline] __tun_detach+0xffc/0x12f0 drivers/net/tun.c:696 tun_detach drivers/net/tun.c:713 [inline] tun_chr_close+0xc4/0x190 drivers/net/tun.c:3466 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f758400eb19 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:00007f7581584188 EFLAGS: 00000246 ORIG_RAX: 0000000000000124 RAX: 0000000000000004 RBX: 00007f7584121f60 RCX: 00007f758400eb19 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008 RBP: 00007f7584068f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe47a1f44f R14: 00007f7581584300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5702 Comm: syz-executor.2 Not tainted 5.10.147 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:19 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:100 [inline] RIP: 0010:queued_spin_lock_slowpath+0x122/0x8c0 kernel/locking/qspinlock.c:326 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 09 07 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 60 e2 f8 02 f3 90 73 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e1 00 00 RSP: 0018:ffff88806cf09a38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffffff87932ce0 RCX: ffffffff81275d27 RDX: fffffbfff0f2659d RSI: 0000000000000004 RDI: ffffffff87932ce0 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87932ce3 R10: fffffbfff0f2659c R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f2659c R14: 0000000000000001 R15: 1ffff1100d9e1348 FS: 00007fe482e88700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d524000 CR3: 000000004bf6a000 CR4: 0000000000350ee0 Call Trace: queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x1dc/0x260 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] mac80211_hwsim_tx_frame_no_nl.isra.0+0x695/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1445 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1711 mac80211_hwsim_beacon_tx+0x494/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1765 __iterate_interfaces+0x1f0/0x530 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x72/0x180 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1788 __run_hrtimer kernel/time/hrtimer.c:1583 [inline] __hrtimer_run_queues+0x5e8/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b 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:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196 Code: ff ff ff b8 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 48 8b 34 24 <65> 48 8b 14 25 80 6f 02 00 65 8b 05 ac 45 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff88804a9c76c0 EFLAGS: 00000217 RAX: 000000000003ffff RBX: 0000000000000000 RCX: ffffc90004803000 RDX: 0000000000040000 RSI: ffffffff81fc9dd8 RDI: 0000000000000005 RBP: ffffffff850dba00 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000fffffff R13: ffffffff84900dc0 R14: 0000000000000000 R15: ffff888032920498 ida_alloc_range+0x118/0x820 lib/idr.c:397 proc_alloc_inum fs/proc/generic.c:211 [inline] proc_register+0x3a/0x6c0 fs/proc/generic.c:375 proc_create_net_data+0x145/0x1b0 fs/proc/proc_net.c:117 unix_net_init+0x9e/0xf0 net/unix/af_unix.c:2956 ops_init net/core/net_namespace.c:152 [inline] setup_net+0x377/0x970 net/core/net_namespace.c:344 copy_net_ns+0x2ca/0x5e0 net/core/net_namespace.c:485 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x39e/0x480 kernel/nsproxy.c:179 copy_process+0x2463/0x66f0 kernel/fork.c:2109 kernel_clone+0xe7/0xa20 kernel/fork.c:2467 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2742 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fe485912b19 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:00007fe482e88188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fe485a25f60 RCX: 00007fe485912b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000200 RBP: 00007fe48596cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1a66b79f R14: 00007fe482e88300 R15: 0000000000022000 Bluetooth: hci6: command 0x0406 tx timeout ---------------- Code disassembly (best guess), 4 bytes skipped: 0: e8 fe 49 5b 00 callq 0x5b4a03 5: e9 bf fd ff ff jmpq 0xfffffdc9 a: e8 f4 49 5b 00 callq 0x5b4a03 f: e9 8c fd ff ff jmpq 0xfffffda0 14: e8 ea 49 5b 00 callq 0x5b4a03 19: e9 44 fd ff ff jmpq 0xfffffd62 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: 48 8b 07 mov (%rdi),%rax * 26: e9 68 c5 0f 03 jmpq 0x30fc593 <-- trapping instruction 2b: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 32: 00 33: 41 57 push %r15 35: 89 d0 mov %edx,%eax 37: 41 56 push %r14 39: 41 55 push %r13 3b: 41 rex.B