watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.4:4269] Modules linked in: irq event stamp: 6057429 hardirqs last enabled at (6057428): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6057429): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (6021366): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6021371): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4269 Comm: syz-executor.4 Not tainted 5.10.224 #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 10 a4 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: ffffffff87a04180 RCX: ffffffff81279b37 RDX: fffffbfff0f40831 RSI: 0000000000000004 RDI: ffffffff87a04180 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87a04183 R10: fffffbfff0f40830 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f40830 R14: 0000000000000001 R15: 1ffff1100d9e1348 FS: 00007fbfec8b6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055806eef92c8 CR3: 0000000047edc000 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:1450 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1716 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:1584 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1648 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1665 __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:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 38 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 1a a4 3f fd 48 89 ef e8 e2 5d 40 fd f6 c7 02 75 10 53 9d <65> ff 0d c4 e0 1a 7c 5b 5d e9 3d b1 38 00 e8 38 85 5f fd eb e9 66 RSP: 0018:ffff88800b9d7400 EFLAGS: 00000246 RAX: 00000000005be0f9 RBX: 0000000000000246 RCX: 1ffffffff0d146fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e78e88 RBP: ffffffff850a6640 R08: 0000000000000001 R09: ffffffff8686877f R10: fffffbfff0d0d0ef R11: 0000000000000001 R12: ffff888009aed0e0 R13: ffff888009aec048 R14: ffff888008041140 R15: ffff88800fd46800 find_and_remove_object+0xe4/0x120 mm/kmemleak.c:553 delete_object_full mm/kmemleak.c:684 [inline] kmemleak_free+0x1f/0x40 mm/kmemleak.c:966 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:605 [inline] skb_release_data+0x604/0x820 net/core/skbuff.c:625 skb_release_all net/core/skbuff.c:679 [inline] __kfree_skb+0x46/0x60 net/core/skbuff.c:693 sk_wmem_free_skb include/net/sock.h:1589 [inline] tcp_rtx_queue_unlink_and_free include/net/tcp.h:1885 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3327 [inline] tcp_ack+0x1c40/0x5690 net/ipv4/tcp_input.c:3884 tcp_rcv_established+0x57e/0x1e30 net/ipv4/tcp_input.c:5959 tcp_v6_do_rcv+0x7b3/0x1520 net/ipv6/tcp_ipv6.c:1506 sk_backlog_rcv include/net/sock.h:1039 [inline] __release_sock+0x139/0x3b0 net/core/sock.c:2570 release_sock+0x54/0x1b0 net/core/sock.c:3111 sk_wait_data+0x1a7/0x4d0 net/core/sock.c:2612 tcp_recvmsg+0x17b2/0x2930 net/ipv4/tcp.c:2276 inet6_recvmsg+0x13b/0x6e0 net/ipv6/af_inet6.c:682 sock_recvmsg_nosec net/socket.c:904 [inline] sock_recvmsg+0xff/0x180 net/socket.c:922 __sys_recvfrom+0x1be/0x2f0 net/socket.c:2062 __do_sys_recvfrom net/socket.c:2080 [inline] __se_sys_recvfrom net/socket.c:2076 [inline] __x64_sys_recvfrom+0xdd/0x1b0 net/socket.c:2076 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fbfef361b19 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:00007fbfec8b6188 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 00007fbfef475020 RCX: 00007fbfef361b19 RDX: 0000000000001000 RSI: 0000000020001e00 RDI: 0000000000000003 RBP: 00007fbfef3bbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000cd08 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5692b4df R14: 00007fbfec8b6300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4251 Comm: syz-executor.6 Not tainted 5.10.224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:634 Code: 00 66 0f 1f 84 00 00 00 00 00 0f 01 ca 6a ff e8 16 05 00 00 48 89 e7 e8 fe d6 e5 ff e9 39 06 00 00 66 0f 1f 84 00 00 00 00 00 <0f> 01 ca 6a ff e8 f6 04 00 00 48 89 e7 e8 7e d5 e5 ff e9 19 06 00 RSP: 0018:ffff88801b08f658 EFLAGS: 00000093 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81576777 RDX: ffff888046e44ec0 RSI: ffffffff815767d2 RDI: ffff88806ce38000 RBP: ffff88806ce38000 R08: 0000000000000000 R09: ffffffff86868727 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88806ce38028 R13: ffff88806ce38028 R14: ffff888046e44ec0 R15: ffff88801b08fa70 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055806eeec678 CR3: 000000000d4e0000 CR4: 0000000000350ef0 Call Trace: RIP: 0010:lock_release+0xa/0x680 kernel/locking/lockdep.c:5574 Code: c7 c7 b8 6f 67 85 e8 45 64 45 00 4c 8b 4c 24 10 e9 51 fd ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df <41> 57 41 56 41 55 41 54 49 89 fc 55 53 48 81 ec 90 00 00 00 48 8d perf: interrupt took too long (3931 > 3915), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (3931 > 3915), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (4924 > 4913), lowering kernel.perf_event_max_sample_rate to 40000 perf: interrupt took too long (6157 > 6155), lowering kernel.perf_event_max_sample_rate to 32000 perf: interrupt took too long (7780 > 7696), lowering kernel.perf_event_max_sample_rate to 25000 Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 65 48 add %ah,0x48(%rbp) 5: 2b 04 25 28 00 00 00 sub 0x28,%eax c: 0f 85 09 07 00 00 jne 0x71b 12: 48 81 c4 88 00 00 00 add $0x88,%rsp 19: 5b pop %rbx 1a: 5d pop %rbp 1b: 41 5c pop %r12 1d: 41 5d pop %r13 1f: 41 5e pop %r14 21: 41 5f pop %r15 23: e9 10 a4 f8 02 jmpq 0x2f8a438 28: f3 90 pause * 2a: e9 73 ff ff ff jmpq 0xffffffa2 <-- trapping instruction 2f: 44 8b 74 24 48 mov 0x48(%rsp),%r14d 34: 41 81 fe 00 01 00 00 cmp $0x100,%r14d 3b: 0f .byte 0xf 3c: 84 e1 test %ah,%cl