------------[ cut here ]------------ WARNING: CPU: 0 PID: 6107 at kernel/events/core.c:1978 perf_group_attach+0x396/0x450 kernel/events/core.c:1978 Modules linked in: CPU: 0 PID: 6107 Comm: syz-executor.3 Not tainted 5.10.90 #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 1f ec f2 ff e8 1a ec f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 7c 38 47 85 e8 87 37 1e 00 e9 b9 fc RSP: 0018:ffff88806ce09ef0 EFLAGS: 00010046 RAX: 0000000080010003 RBX: ffff888044549000 RCX: ffffffff814caacf RDX: ffff888043c78000 RSI: ffffffff814cad96 RDI: ffff888044549220 RBP: ffff88801cb61000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888043439c00 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88806ce3f748 FS: 0000555556a07400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f780eff3f40 CR3: 0000000043500000 CR4: 0000000000350ef0 Call Trace: add_event_to_ctx kernel/events/core.c:2654 [inline] __perf_install_in_context+0x246/0x2d0 kernel/events/core.c:2805 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:_raw_spin_unlock_irq+0x27/0x30 kernel/locking/spinlock.c:200 Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 ae 40 48 fd 48 89 ef e8 96 f7 48 fd e8 01 76 67 fd fb 65 ff 0d b9 0a 24 7c <5d> c3 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 RSP: 0018:ffff8880421ef8a8 EFLAGS: 00000282 RAX: 0000000000000d3f RBX: ffff888043c78000 RCX: 1ffffffff0a8de91 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83de647f RBP: ffff88806ce3b200 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88806ce3b200 R13: ffff888045669940 R14: ffff888016fc8700 R15: 0000000000000000 finish_lock_switch kernel/sched/core.c:3530 [inline] finish_task_switch+0x126/0x5d0 kernel/sched/core.c:3630 context_switch kernel/sched/core.c:3794 [inline] __schedule+0x850/0x1e80 kernel/sched/core.c:4540 schedule+0xcb/0x270 kernel/sched/core.c:4618 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue_me+0x2a7/0x570 kernel/futex.c:2607 futex_wait+0x1df/0x5d0 kernel/futex.c:2709 do_futex+0xf86/0x1a50 kernel/futex.c:3735 __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: 0033:0x7f5edb157b19 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:00007fff05780798 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 00007f5edb157b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5edb26b02c RBP: 00007f5edb26b02c R08: 00007fff057c9090 R09: 0000000000000000 R10: 00007fff05780870 R11: 0000000000000246 R12: 00000000000a17c4 R13: 00000000000003e8 R14: 00007f5edb26af60 R15: 00000000000a16b3 irq event stamp: 3392 hardirqs last enabled at (3391): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (3391): [] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 hardirqs last disabled at (3392): [] sysvec_call_function_single+0xb/0xa0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3236): [] memcpy include/linux/string.h:399 [inline] softirqs last enabled at (3236): [] fpu__copy+0x173/0x550 arch/x86/kernel/fpu/core.c:241 softirqs last disabled at (3234): [] fpu__copy+0xa1/0x550 arch/x86/kernel/fpu/core.c:229 ---[ end trace 50f8441f78305811 ]--- ====================================================== ---------------- Code disassembly (best guess): 0: 44 00 00 add %r8b,(%rax) 3: 55 push %rbp 4: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 9: 48 89 fd mov %rdi,%rbp c: 48 8d 7f 18 lea 0x18(%rdi),%rdi 10: e8 ae 40 48 fd callq 0xfd4840c3 15: 48 89 ef mov %rbp,%rdi 18: e8 96 f7 48 fd callq 0xfd48f7b3 1d: e8 01 76 67 fd callq 0xfd677623 22: fb sti 23: 65 ff 0d b9 0a 24 7c decl %gs:0x7c240ab9(%rip) # 0x7c240ae3 * 2a: 5d pop %rbp <-- trapping instruction 2b: c3 retq 2c: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 33: 55 push %rbp 34: 48 89 fd mov %rdi,%rbp 37: 48 83 c7 18 add $0x18,%rdi 3b: 53 push %rbx 3c: 48 89 f3 mov %rsi,%rbx 3f: 48 rex.W