------------[ cut here ]------------ WARNING: CPU: 0 PID: 8023 at kernel/events/core.c:1978 perf_group_attach+0x396/0x450 kernel/events/core.c:1978 Modules linked in: CPU: 0 PID: 8023 Comm: syz-executor.4 Not tainted 5.10.79 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:perf_group_attach+0x396/0x450 kernel/events/core.c:1978 Code: 48 c1 e8 03 42 80 3c 20 00 75 5f 48 8b 5b 10 48 83 eb 10 48 39 dd 75 d4 5b 5d 41 5c 41 5d 41 5e e9 9f ef f2 ff e8 9a ef f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 3c 2d 47 85 e8 17 33 1e 00 e9 b9 fc RSP: 0018:ffff88806ce09ef0 EFLAGS: 00010046 RAX: 0000000080010003 RBX: ffff8880435cf000 RCX: ffffffff814ca29f RDX: ffff8880443b3280 RSI: ffffffff814ca566 RDI: ffff8880435cf220 RBP: ffff888041efa000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880455f9400 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88806ce37748 FS: 0000555555b62400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d82d000 CR3: 00000000168b6000 CR4: 0000000000350ef0 Call Trace: add_event_to_ctx kernel/events/core.c:2673 [inline] __perf_install_in_context+0x246/0x2d0 kernel/events/core.c:2824 remote_function kernel/events/core.c:88 [inline] remote_function+0x11d/0x1a0 kernel/events/core.c:68 flush_smp_call_function_queue+0x1b4/0x5d0 kernel/smp.c:395 __sysvec_call_function_single+0x92/0x370 arch/x86/kernel/smp.c:248 asm_call_irq_on_stack+0x12/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_call_function_single+0x7f/0xa0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:643 RIP: 0010:lock_acquire+0x1b9/0x490 kernel/locking/lockdep.c:5530 Code: 53 db 7e e8 19 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 68 53 db 7e 83 f8 01 4c 8b 54 24 08 0f 85 6a 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:ffff8880453efa58 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff11008a7df4d RCX: 0000000000002cd2 RDX: 1ffff11008876765 RSI: 0000000000000008 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8654a6a7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880086e5ea0 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] futex_wake+0x1b8/0x490 kernel/futex.c:1611 do_futex+0xfb4/0x1a50 kernel/futex.c:3740 __do_sys_futex+0x2bb/0x480 kernel/futex.c:3798 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f42fb2eeb19 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:00007ffd4cb99e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f42fb2eeb19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f42fb402028 RBP: 00007f42fb402020 R08: 00007f42fb3fe0f0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f42fb409480 R13: 00007ffd4cb99f30 R14: 00007f42fb401f60 R15: 000000000018ec87 irq event stamp: 6168 hardirqs last enabled at (6167): [] syscall_enter_from_user_mode+0x1d/0x50 kernel/entry/common.c:98 hardirqs last disabled at (6168): [] sysvec_call_function_single+0xb/0xa0 arch/x86/kernel/smp.c:243 softirqs last enabled at (5356): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5297): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 53b33936f0c28ab0 ]--- ====================================================== ---------------- Code disassembly (best guess), 3 bytes skipped: 0: e8 19 91 ff ff callq 0xffff911e 5: b8 ff ff ff ff mov $0xffffffff,%eax a: 48 83 c4 20 add $0x20,%rsp e: 65 0f c1 05 68 53 db xadd %eax,%gs:0x7edb5368(%rip) # 0x7edb537e 15: 7e 16: 83 f8 01 cmp $0x1,%eax 19: 4c 8b 54 24 08 mov 0x8(%rsp),%r10 1e: 0f 85 6a 02 00 00 jne 0x28e 24: 41 52 push %r10 26: 9d popfq * 27: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 2e: fc ff df 31: 48 01 c3 add %rax,%rbx 34: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 3b: 48 rex.W 3c: c7 .byte 0xc7