------------[ cut here ]------------ WARNING: CPU: 1 PID: 13878 at kernel/events/core.c:2045 perf_group_attach+0x396/0x450 kernel/events/core.c:2045 Modules linked in: CPU: 1 PID: 13878 Comm: syz-executor.1 Not tainted 5.10.109 #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 8f e5 f2 ff e8 8a e5 f2 ff <0f> 0b e9 b1 fd ff ff 48 c7 c7 bc 50 47 85 e8 67 3e 1e 00 e9 b9 fc RSP: 0018:ffff888049ae7cb0 EFLAGS: 00010016 RAX: 000000000000121c RBX: ffff888044e01000 RCX: ffffc9000581b000 RDX: 0000000000040000 RSI: ffffffff814cc986 RDI: ffff888044e01218 RBP: ffff88804cdfe000 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888042112400 R13: 0000000000000000 R14: ffff888042112808 R15: 0000000000000000 FS: 00007f3d5189d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fabc91983a4 CR3: 0000000042d68000 CR4: 0000000000350ee0 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:12134 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f3d54327b19 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:00007f3d5189d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f3d5443af60 RCX: 00007f3d54327b19 RDX: 0000000000000000 RSI: 0000000000000255 RDI: 0000000020001d80 RBP: 00007f3d54381f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000 9pnet: Could not find request transport: fdrfdnÌ0x0000000000000004 R13: 00007ffdb743167f R14: 00007f3d5189d300 R15: 0000000000022000 irq event stamp: 5408 hardirqs last enabled at (5407): [] generic_exec_single+0x214/0x300 kernel/smp.c:295 hardirqs last disabled at (5408): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (5408): [] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167 softirqs last enabled at (5188): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4953): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 608479bb1a1b0504 ]--- ======================================================