watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.0:4940] Modules linked in: irq event stamp: 4557717 hardirqs last enabled at (4557716): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4557717): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (4552654): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4552659): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4940 Comm: syz-executor.0 Not tainted 5.10.225 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_done arch/x86/include/asm/unwind.h:46 [inline] RIP: 0010:unwind_get_return_address+0xe/0xa0 arch/x86/kernel/unwind_orc.c:320 Code: b8 21 5c 00 eb ac e8 b1 21 5c 00 e9 75 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 <48> c1 ea 03 53 48 89 fb 0f b6 04 02 84 c0 74 04 3c 03 7e 59 8b 03 RSP: 0018:ffff88806ce09738 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffffffff813009e0 RCX: ffff88806ce097d8 RDX: ffff88806ce09748 RSI: ffff88806ce097d0 RDI: ffff88806ce09748 RBP: ffff88806ce097d0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9c12cc R12: ffff88806ce09800 R13: 0000000000000000 R14: ffff8880477a3480 R15: 00000000000000e8 FS: 00007f1f99aa7700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561d2cade578 CR3: 0000000048922000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 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] kmem_cache_alloc_node+0x14b/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 skb_copy+0x183/0x350 net/core/skbuff.c:1529 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb1d/0x13d0 drivers/net/wireless/mac80211_hwsim.c:1499 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:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __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:put_cpu_partial+0xa6/0x130 mm/slub.c:2389 Code: 43 28 89 73 10 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 RSP: 0018:ffff88804952f5f8 EFLAGS: 00000202 RAX: 000000000003fff0 RBX: ffffea0001275c00 RCX: 00000000800c000b RDX: 0000000000000001 RSI: ffffea0001275c00 RDI: ffff888008801280 RBP: ffff888008801280 R08: 0000000000000000 R09: ffffffff816c9301 R10: ffff888049d70c80 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff8880474dd0e0 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/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_percpu+0xa0/0x100 mm/kmemleak.c:924 pcpu_alloc+0x4e2/0x1240 mm/percpu.c:1842 alloc_vfsmnt+0xfd/0x680 fs/namespace.c:192 clone_mnt+0x6c/0xce0 fs/namespace.c:1039 copy_tree+0x3b0/0xa60 fs/namespace.c:1860 copy_mnt_ns+0x144/0xa00 fs/namespace.c:3350 create_new_namespaces+0xd6/0xb20 kernel/nsproxy.c:78 copy_namespaces+0x3fb/0x4f0 kernel/nsproxy.c:179 copy_process+0x385b/0x7800 kernel/fork.c:2129 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2781 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f1f9c531b19 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:00007f1f99aa7188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f1f9c644f60 RCX: 00007f1f9c531b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000ac0 RBP: 00007f1f9c58bf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa3e420ef R14: 00007f1f99aa7300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4947 Comm: syz-executor.2 Not tainted 5.10.225 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:193 Code: ff ff b9 ff 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 fc cf c1 7e a9 00 RSP: 0018:ffff88806cf09570 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000075b4a RCX: ffffffff8131aec5 RDX: 0000000000000000 RSI: ffff88803f9a3480 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048c2e158 R13: 0000000000002710 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f7d32484700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53438b6f40 CR3: 0000000048338000 CR4: 0000000000350ee0 Call Trace: ktime_get+0xbe/0x1f0 kernel/time/timekeeping.c:833 hrtimer_forward_now include/linux/hrtimer.h:503 [inline] perf_swevent_hrtimer+0x244/0x3f0 kernel/events/core.c:10492 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x1ca/0xb40 kernel/time/hrtimer.c:1650 hrtimer_interrupt+0x2fd/0x9b0 kernel/time/hrtimer.c:1712 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1083 [inline] __sysvec_apic_timer_interrupt+0xfb/0x310 arch/x86/kernel/apic/apic.c:1100 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x3e/0xa0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 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: ffffffff87a04100 RCX: ffffffff81279b37 RDX: fffffbfff0f40821 RSI: 0000000000000004 RDI: ffffffff87a04100 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87a04103 R10: fffffbfff0f40820 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f40820 R14: 0000000000000001 R15: 1ffff1100d9e1348 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:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __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:lock_acquire+0x1b9/0x470 kernel/locking/lockdep.c:5534 Code: 45 db 7e e8 39 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 f8 44 db 7e 83 f8 01 4c 8b 54 24 08 0f 85 48 02 00 00 41 52 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff888018226f80 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff11003044df2 RCX: 00000000b9192d54 RDX: 1ffff11007f347b8 RSI: ba1024ebbb9571ea RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff868686e7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff8c20 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] __is_insn_slot_addr+0x3f/0x290 kernel/kprobes.c:299 is_kprobe_optinsn_slot include/linux/kprobes.h:336 [inline] kernel_text_address kernel/extable.c:149 [inline] kernel_text_address+0xdf/0x120 kernel/extable.c:120 __kernel_text_address+0x9/0x40 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 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:143 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:211 alloc_skb_fclone include/linux/skbuff.h:1152 [inline] sk_stream_alloc_skb+0x109/0xc30 net/ipv4/tcp.c:892 tso_fragment net/ipv4/tcp_output.c:2127 [inline] tcp_write_xmit+0x1e78/0x5c10 net/ipv4/tcp_output.c:2687 __tcp_push_pending_frames+0xaa/0x330 net/ipv4/tcp_output.c:2882 tcp_push_pending_frames include/net/tcp.h:1893 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5474 [inline] tcp_rcv_established+0x8f0/0x1e30 net/ipv4/tcp_input.c:5970 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 tcp_sendpage+0x90/0xd0 net/ipv4/tcp.c:1132 inet_sendpage+0xc9/0x130 net/ipv4/af_inet.c:847 kernel_sendpage.part.0+0x146/0x290 net/socket.c:3548 kernel_sendpage net/socket.c:3545 [inline] sock_sendpage+0xe5/0x140 net/socket.c:963 pipe_to_sendpage+0x2af/0x380 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x43d/0x890 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd5/0x140 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x10f/0x170 fs/splice.c:933 splice_direct_to_actor+0x387/0x980 fs/splice.c:888 do_splice_direct+0x1c4/0x290 fs/splice.c:976 do_sendfile+0x553/0x11e0 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0x1d1/0x210 fs/read_write.c:1304 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f7d34f0eb19 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:00007f7d32484188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f7d35021f60 RCX: 00007f7d34f0eb19 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 RBP: 00007f7d34f68f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009bbb R11: 0000000000 Lost 1 message(s)! ---------------- Code disassembly (best guess): 0: b8 21 5c 00 eb mov $0xeb005c21,%eax 5: ac lods %ds:(%rsi),%al 6: e8 b1 21 5c 00 callq 0x5c21bc b: e9 75 ff ff ff jmpq 0xffffff85 10: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 17: 00 00 00 00 1b: 90 nop 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 89 fa mov %rdi,%rdx 29: 55 push %rbp * 2a: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction 2e: 53 push %rbx 2f: 48 89 fb mov %rdi,%rbx 32: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 36: 84 c0 test %al,%al 38: 74 04 je 0x3e 3a: 3c 03 cmp $0x3,%al 3c: 7e 59 jle 0x97 3e: 8b 03 mov (%rbx),%eax