------------[ cut here ]------------ WARNING: CPU: 0 PID: 4300 at kernel/events/core.c:2045 perf_group_attach+0x396/0x450 kernel/events/core.c:2045 Modules linked in: CPU: 0 PID: 4300 Comm: syz-executor.3 Not tainted 5.10.96 #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:2045 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 5f eb f2 ff e8 5a eb f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 bc 42 47 85 e8 47 36 1e 00 e9 b9 fc RSP: 0018:ffff888044657cb0 EFLAGS: 00010012 RAX: 00000000000019f3 RBX: ffff888044caf000 RCX: ffffc9000401b000 RDX: 0000000000040000 RSI: ffffffff814cb686 RDI: ffff888044caf218 RBP: ffff888044bc8000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d0e1000 R13: 0000000000000000 R14: ffff88801d0e0808 R15: 0000000000000000 FS: 00007f71e6ce6700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000201a8000 CR3: 0000000044ebe000 CR4: 0000000000350ef0 Call Trace: add_event_to_ctx kernel/events/core.c:2688 [inline] perf_install_in_context+0x44d/0x550 kernel/events/core.c:2963 __do_sys_perf_event_open+0x1cee/0x2d00 kernel/events/core.c:12126 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f71e9770b19 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:00007f71e6ce6188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f71e9883f60 RCX: 00007f71e9770b19 RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000020001d80 RBP: 00007f71e97caf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc344a51ef R14: 00007f71e6ce6300 R15: 0000000000022000 irq event stamp: 1664 hardirqs last enabled at (1663): [] __send_ipi_mask+0x2fd/0x3c0 arch/x86/kernel/kvm.c:555 hardirqs last disabled at (1664): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (1664): [] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167 softirqs last enabled at (1358): [] memcpy include/linux/string.h:399 [inline] softirqs last enabled at (1358): [] fpu__copy+0x173/0x550 arch/x86/kernel/fpu/core.c:241 softirqs last disabled at (1356): [] fpu__copy+0xa1/0x550 arch/x86/kernel/fpu/core.c:229 ---[ end trace c7590d43032686f3 ]--- ======================================================