Bluetooth: hci2: command 0x0406 tx timeout watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.2:14832] Modules linked in: irq event stamp: 5212393 hardirqs last enabled at (5212392): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5212393): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (5188722): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5188727): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 14832 Comm: syz-executor.2 Not tainted 5.10.151 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:45 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline] RIP: 0010:deref_stack_reg+0x4e/0x160 arch/x86/kernel/unwind_orc.c:357 Code: 0f b6 04 02 84 c0 74 08 3c 03 0f 8e df 00 00 00 41 8b 04 24 85 c0 74 62 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 08 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 cb 00 00 00 49 8d 7c 24 10 4d 8b 6c RSP: 0018:ffff88806cf09528 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffff88806cf09670 RCX: ffffffff85a048c4 RDX: ffff88806cf09638 RSI: ffff88806cf09978 RDI: ffff88806cf09638 RBP: ffff88806cf09978 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12b3 R12: ffff88806cf09630 R13: ffff88806cf09630 R14: 1ffff1100d9e12b3 R15: ffffffff85a048c8 FS: 00007fed3f5a9700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556e39c58 CR3: 000000003f99e000 CR4: 0000000000350ee0 Call Trace: 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] 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:4632 [inline] skb_set_kcov_handle include/linux/skbuff.h:4622 [inline] __alloc_skb+0x3c1/0x620 net/core/skbuff.c:253 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:446 netdev_alloc_skb include/linux/skbuff.h:2836 [inline] dev_alloc_skb include/linux/skbuff.h:2849 [inline] __ieee80211_beacon_get+0x3af/0x13a0 net/mac80211/tx.c:4874 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4988 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x8f0 drivers/net/wireless/mac80211_hwsim.c:1735 __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:qlist_free_all+0x3c/0xe0 mm/kasan/quarantine.c:168 Code: f6 0f 84 a3 00 00 00 49 89 fc 41 bd 00 00 00 80 49 c7 c6 00 00 00 80 48 bd 00 00 00 00 00 fc ff df eb 2c 48 63 87 c0 00 00 00 <4c> 8b 3e 48 c7 c2 65 cf 6b 81 48 29 c6 48 89 f0 48 c1 e8 03 c6 04 RSP: 0018:ffff88803fbaf690 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffea00010903bf RDX: 0000000000000000 RSI: ffff88801d1b9790 RDI: ffff88800c37e280 RBP: dffffc0000000000 R08: 0000000000000011 R09: ffffffff816bcf01 R10: ffff88803ec06870 R11: 0000000000000001 R12: ffff88803fbaf6c8 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff88801d1b9790 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] __kmalloc+0x150/0x3f0 mm/slub.c:3967 kmalloc_array include/linux/slab.h:592 [inline] kcalloc include/linux/slab.h:603 [inline] ext4_find_extent+0xa3d/0xd30 fs/ext4/extents.c:906 ext4_ext_map_blocks+0x1c8/0x5b90 fs/ext4/extents.c:4097 ext4_map_blocks+0x9cc/0x1970 fs/ext4/inode.c:562 ext4_append+0x1b8/0x4e0 fs/ext4/namei.c:75 ext4_init_new_dir+0x25e/0x4d0 fs/ext4/namei.c:2816 ext4_mkdir+0x3c1/0xb10 fs/ext4/namei.c:2861 vfs_mkdir+0x41f/0x660 fs/namei.c:3645 do_mkdirat+0x145/0x2a0 fs/namei.c:3668 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fed42032c27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 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:00007fed3f5a8fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fed42032c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fed3f5a9040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007fed3f5a9000 R15: 0000000000000000 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:689 ---------------- Code disassembly (best guess): 0: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 4: 84 c0 test %al,%al 6: 74 08 je 0x10 8: 3c 03 cmp $0x3,%al a: 0f 8e df 00 00 00 jle 0xef 10: 41 8b 04 24 mov (%r12),%eax 14: 85 c0 test %eax,%eax 16: 74 62 je 0x7a 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 27: 48 89 fa mov %rdi,%rdx * 2a: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction 2e: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 32: 0f 85 cb 00 00 00 jne 0x103 38: 49 8d 7c 24 10 lea 0x10(%r12),%rdi 3d: 4d rex.WRB 3e: 8b .byte 0x8b 3f: 6c insb (%dx),%es:(%rdi)