bisecting fixing commit since aec3002d07fd2564cd32e56f126fa6db14a168bb
building syzkaller on 907bf74686129436f81aa40336ee89f7cc01b0b4
testing commit aec3002d07fd2564cd32e56f126fa6db14a168bb with gcc (GCC) 8.1.0
kernel signature: d86b5f2449788fbc806832dc0e20044e65a82fc1fe4595d098f275884772813d
all runs: crashed: WARNING in perf_group_attach
testing current HEAD a083db76118d20d070794ecf79af17843406c3f6
testing commit a083db76118d20d070794ecf79af17843406c3f6 with gcc (GCC) 8.1.0
kernel signature: ed7ed3d18b9a6a272e2af3746b711eb0e376eb345b29965ece6b17ba3638861e
all runs: crashed: WARNING in perf_group_attach
revisions tested: 2, total time: 24m20.368652162s (build: 17m7.813874432s, test: 6m27.705799479s)
the crash still happens on HEAD
commit msg: Linux 4.19.107
crash: WARNING in perf_group_attach
8021q: adding VLAN 0 to HW filter on device batadv0
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
WARNING: CPU: 0 PID: 7662 at kernel/events/core.c:1834 perf_group_attach+0x3b1/0x470 kernel/events/core.c:1826
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7662 Comm: syz-executor.2 Not tainted 4.19.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x123/0x177 lib/dump_stack.c:118
 panic+0x1cd/0x375 kernel/panic.c:186
 __warn.cold.8+0x1b/0x3e kernel/panic.c:541
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:perf_group_attach+0x3b1/0x470 kernel/events/core.c:1834
Code: ec 10 4c 39 e3 75 d7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ee 77 1d 00 e9 c8 fc ff ff e8 e4 77 1d 00 e9 fe fc ff ff <0f> 0b e9 75 fd ff ff e8 f3 77 1d 00 eb c1 e8 ec 77 1d 00 e9 6d fc
RSP: 0018:ffff8880a0b9faa8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff888079c7c240 RCX: 1ffff1100f51b28a
RDX: 1ffff1100f51b2b3 RSI: ffff8880aea313e0 RDI: ffff88807a8d9598
RBP: ffff8880a0b9fad8 R08: ffffffff88ea2018 R09: 0000000000000006
R10: fffffbfff11d4401 R11: 0000000000000001 R12: ffff88807a8d9380
R13: ffffe8ffffc141d0 R14: 0000000000000000 R15: ffff8880aea313c8
 add_event_to_ctx kernel/events/core.c:2392 [inline]
 __perf_install_in_context+0x3f6/0x860 kernel/events/core.c:2533
 remote_function+0xff/0x180 kernel/events/core.c:87
 generic_exec_single+0x1f5/0x390 kernel/smp.c:153
 smp_call_function_single+0xe5/0x370 kernel/smp.c:299
 cpu_function_call kernel/events/core.c:141 [inline]
 perf_install_in_context+0x2c1/0x310 kernel/events/core.c:2574
 __do_sys_perf_event_open+0x13fa/0x20d0 kernel/events/core.c:10885
 __se_sys_perf_event_open kernel/events/core.c:10510 [inline]
 __x64_sys_perf_event_open+0xb9/0x140 kernel/events/core.c:10510
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459519
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007efc6e365c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007efc6e3666d4
R13: 00000000004c618d R14: 00000000004dae20 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..