Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.4:4038] Modules linked in: irq event stamp: 19416393 hardirqs last enabled at (19416392): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (19416393): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (19412180): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (19412183): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4038 Comm: syz-executor.4 Not tainted 5.10.236 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__read_once_word_nocheck+0x0/0x10 include/asm-generic/rwonce.h:67 Code: 5c 00 e9 0a fe ff ff e8 4e 59 5c 00 e9 bf fd ff ff e8 44 59 5c 00 e9 8c fd ff ff e8 3a 59 5c 00 e9 44 fd ff ff cc cc cc cc cc <48> 8b 07 e9 88 d4 0f 03 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 RSP: 0018:ffff88806cf09628 EFLAGS: 00000283 RAX: ffff88806cf0a000 RBX: ffff88806cf09778 RCX: ffff88806cf09778 RDX: dffffc0000000000 RSI: ffff88806cf09f18 RDI: ffff88806cf09f18 RBP: ffff88806cf09f18 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12d4 R12: ffff88806cf09738 R13: ffff88806cf02000 R14: 1ffff1100d9e12d4 R15: ffffffff859bed1c FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558197478cc0 CR3: 000000000fde4000 CR4: 0000000000350ee0 Call Trace: deref_stack_reg+0xf2/0x160 arch/x86/kernel/unwind_orc.c:360 unwind_next_frame+0x1289/0x1a90 arch/x86/kernel/unwind_orc.c:589 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] __kmalloc_node_track_caller+0x189/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:212 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:448 netdev_alloc_skb include/linux/skbuff.h:2855 [inline] dev_alloc_skb include/linux/skbuff.h:2868 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __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:call_rcu+0x2bd/0x9c0 kernel/rcu/tree.c:3051 Code: 85 ab 05 00 00 8b 85 28 01 00 00 65 ff 0d 9b d4 d3 7e a8 02 0f 84 8d 01 00 00 48 83 7c 24 08 00 0f 85 f0 00 00 00 ff 34 24 9d <48> 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f e9 f0 a4 f1 02 4c 89 c7 RSP: 0018:ffff88802093f798 EFLAGS: 00000246 RAX: 000000000127939f RBX: ffff888046ac9310 RCX: 1ffffffff0d15902 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812e9c35 RBP: ffff88806cf3c0f0 R08: 0000000000000001 R09: ffffffff8686c78f R10: fffffbfff0d0d8f1 R11: 0000000000000001 R12: 0000000000000a14 R13: ffff88806cf3c000 R14: ffff88806cf3c0e0 R15: ffff88806cf3c098 kmemleak_free_recursive include/linux/kmemleak.h:49 [inline] slab_free_hook mm/slub.c:1517 [inline] slab_free_freelist_hook+0x13e/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kfree+0xd7/0x340 mm/slub.c:4125 skb_free_head net/core/skbuff.c:606 [inline] skb_release_data+0x604/0x820 net/core/skbuff.c:626 skb_release_all net/core/skbuff.c:680 [inline] __kfree_skb net/core/skbuff.c:694 [inline] kfree_skb.part.0+0xa4/0x1c0 net/core/skbuff.c:712 kfree_skb+0x7d/0x100 include/linux/refcount.h:279 skb_queue_purge+0x14/0x30 net/core/skbuff.c:3163 vhci_flush+0x37/0x50 include/linux/skbuff.h:1875 hci_dev_do_close+0x773/0x1240 net/bluetooth/hci_core.c:1794 hci_unregister_dev+0x179/0x460 net/bluetooth/hci_core.c:3854 vhci_release+0x70/0xf0 drivers/bluetooth/hci_vhci.c:345 __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: 0033:0x7fa8b2c46b19 Code: Unable to access opcode bytes at RIP 0x7fa8b2c46aef. RSP: 002b:00007fa8b01bc188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000003 RBX: 00007fa8b2d59f60 RCX: 00007fa8b2c46b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fa8b2ca0f6d R08: 000000000000000a R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc88435b5f R14: 00007fa8b01bc300 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), 2 bytes skipped: 0: e9 0a fe ff ff jmpq 0xfffffe0f 5: e8 4e 59 5c 00 callq 0x5c5958 a: e9 bf fd ff ff jmpq 0xfffffdce f: e8 44 59 5c 00 callq 0x5c5958 14: e9 8c fd ff ff jmpq 0xfffffda5 19: e8 3a 59 5c 00 callq 0x5c5958 1e: e9 44 fd ff ff jmpq 0xfffffd67 23: cc int3 24: cc int3 25: cc int3 26: cc int3 27: cc int3 * 28: 48 8b 07 mov (%rdi),%rax <-- trapping instruction 2b: e9 88 d4 0f 03 jmpq 0x30fd4b8 30: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 37: 00 38: 41 57 push %r15 3a: 89 d0 mov %edx,%eax 3c: 41 56 push %r14