watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.7:5391] Modules linked in: irq event stamp: 4583923 hardirqs last enabled at (4583922): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4583923): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (4578160): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4578163): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 5391 Comm: syz-executor.7 Not tainted 5.10.227 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__orc_find+0xb1/0xf0 arch/x86/kernel/unwind_orc.c:60 Code: 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1 fe 02 4b 8d 04 76 48 8d 04 46 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f ca d3 0f 03 48 83 c4 10 31 c0 5b 5d 41 5c 41 5d 41 5e 41 5f e9 RSP: 0018:ffff88806ce09668 EFLAGS: 00000282 RAX: ffffffff859b9ea0 RBX: 0000000000000002 RCX: ffffffff8130259b RDX: 0000000000000000 RSI: ffffffff859b9e8e RDI: ffffffff856e7f3c RBP: ffff88806ce0977d R08: ffffffff859b9e8e R09: ffffffff859b9f0c R10: 0000000000032042 R11: 1ffff1100d9c12d6 R12: ffff88806ce09790 R13: ffff88806ce09748 R14: 1ffff1100d9c12d6 R15: ffffffff8130259b FS: 00007f3a8ccfd700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001d80 CR3: 00000000455da000 CR4: 0000000000350ef0 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 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] 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:do_syscall_64+0x37/0x40 arch/x86/entry/common.c:56 Code: 00 00 48 3d b8 01 00 00 77 20 48 3d b9 01 00 00 48 19 d2 48 21 d0 48 89 ef 48 8b 04 c5 40 34 40 84 e8 ed 44 3a 00 48 89 45 50 <48> 89 ef 5d e9 30 40 00 00 55 48 89 fd 65 48 8b 04 25 80 6f 02 00 RSP: 0018:ffff8880455eff48 EFLAGS: 00000282 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffc90006e32000 RDX: 0000000000040000 RSI: ffffffff8135c8b4 RDI: ffff88801e6ecee0 RBP: ffff8880455eff58 R08: 0000000000000001 R09: ffff88801e6ecee3 R10: ffffed1003cdd9dc R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f3a8f787b19 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:00007f3a8ccfd218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f3a8f89af68 RCX: 00007f3a8f787b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3a8f89af6c RBP: 00007f3a8f89af60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00007f3a8f89af6c R13: 00007ffeb9fbf4af R14: 00007f3a8ccfd300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.227 #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 40 8a 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: ffffffff87a06080 RCX: ffffffff8127b507 RDX: fffffbfff0f40c11 RSI: 0000000000000004 RDI: ffffffff87a06080 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87a06083 R10: fffffbfff0f40c10 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f40c10 R14: 0000000000000001 R15: 1ffff1100d9e1348 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9176605620 CR3: 000000000dece000 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: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:default_idle+0xe/0x20 arch/x86/kernel/process.c:707 Code: 4e ff ff ff 4c 89 e7 e8 e0 f8 84 fd eb 8f 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e9 07 00 00 00 0f 00 2d 74 85 5a 00 fb f4 ad 86 38 00 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 55 41 54 RSP: 0018:ffff888008987e70 EFLAGS: 00000202 RAX: ffffffff83e7b900 RBX: 0000000000000001 RCX: ffffffff83e634dc RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e7bf08 RBP: ffffed100112f000 R08: 0000000000000001 R09: ffff88806cf3c12b R10: ffffed100d9e7825 R11: 0000000000000001 R12: 0000000000000001 R13: ffffffff85677688 R14: 0000000000000000 R15: dffffc0000000000 default_idle_call+0xbf/0x2c0 kernel/sched/idle.c:112 cpuidle_idle_call kernel/sched/idle.c:194 [inline] do_idle+0x3ad/0x520 kernel/sched/idle.c:300 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:396 secondary_startup_64_no_verify+0xbe/0xcb sr 1:0:0:0: [sr0] tag#0 unaligned transfer print_req_error: 38 callbacks suppressed blk_update_request: I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096896 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 buffer_io_error: 14 callbacks suppressed Buffer I/O error on dev loop4, logical block 2096896, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096897 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096897 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop4, logical block 2096897, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096898 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096898 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop4, logical block 2096898, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096899 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096899 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop4, logical block 2096899, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer blk_update_request: I/O error, dev sr0, sector 2096900 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 blk_update_request: I/O error, dev loop4, sector 2096900 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop4, logical block 2096900, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop4, logical block 2096901, async page read Buffer I/O error on dev loop4, logical block 2096902, async page read Buffer I/O error on dev loop4, logical block 2096903, async page read ---------------- Code disassembly (best guess): 0: 39 c1 cmp %eax,%ecx 2: 73 b0 jae 0xffffffb4 4: 4c 8d 63 fc lea -0x4(%rbx),%r12 8: 49 39 ec cmp %rbp,%r12 b: 73 b3 jae 0xffffffc0 d: 4d 29 ee sub %r13,%r14 10: 49 c1 fe 02 sar $0x2,%r14 14: 4b 8d 04 76 lea (%r14,%r14,2),%rax 18: 48 8d 04 46 lea (%rsi,%rax,2),%rax 1c: 48 83 c4 10 add $0x10,%rsp 20: 5b pop %rbx 21: 5d pop %rbp 22: 41 5c pop %r12 24: 41 5d pop %r13 26: 41 5e pop %r14 28: 41 5f pop %r15 * 2a: e9 ca d3 0f 03 jmpq 0x30fd3f9 <-- trapping instruction 2f: 48 83 c4 10 add $0x10,%rsp 33: 31 c0 xor %eax,%eax 35: 5b pop %rbx 36: 5d pop %rbp 37: 41 5c pop %r12 39: 41 5d pop %r13 3b: 41 5e pop %r14 3d: 41 5f pop %r15 3f: e9 .byte 0xe9