------------[ cut here ]------------ WARNING: CPU: 0 PID: 4213 at kernel/events/core.c:1978 perf_group_attach+0x396/0x450 kernel/events/core.c:1978 Modules linked in: CPU: 0 PID: 4213 Comm: syz-executor.6 Not tainted 5.10.60 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 EXT4-fs (loop0): VFS: Can't find ext4 filesystem 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 0f fd f2 ff e8 0a fd f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 3c 3b 47 85 e8 d7 ec 1d 00 e9 b9 fc RSP: 0018:ffff888042827cb8 EFLAGS: 00010016 RAX: 00000000000018d9 RBX: ffff888041ad8000 RCX: ffffc9000f64e000 RDX: 0000000000040000 RSI: ffffffff814c61a6 RDI: ffff888041ad8220 RBP: ffff88803ffe2000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888043505c00 R13: 0000000000000000 R14: ffff888043506c08 R15: 0000000000000000 FS: 00007fe8b394c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002ab3c58 CR3: 000000001cb9a000 CR4: 0000000000350ef0 Call Trace: add_event_to_ctx kernel/events/core.c:2673 [inline] perf_install_in_context+0x448/0x540 kernel/events/core.c:2948 __do_sys_perf_event_open+0x1ce7/0x2c80 kernel/events/core.c:12066 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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:00007fe8b394c188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 0000000000466609 RDX: 0000000000000000 RSI: 000000000000001b RDI: 0000000020001d80 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd08f2ddaf R14: 00007fe8b394c300 R15: 0000000000022000 irq event stamp: 702 hardirqs last enabled at (701): [] __send_ipi_mask+0x2fd/0x3c0 arch/x86/kernel/kvm.c:555 hardirqs last disabled at (702): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (702): [] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167 softirqs last enabled at (526): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (361): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace b757ff5612bae59a ]--- ======================================================