dlm: non-version read from control device 2147479540
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12774 at kernel/fork.c:677 __put_task_struct.cold+0x29/0x48 kernel/fork.c:677
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12774 Comm: syz-executor.3 Not tainted 4.19.75 #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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x263/0x507 kernel/panic.c:185
 __warn.cold+0x20/0x4a kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 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:__put_task_struct.cold+0x29/0x48 kernel/fork.c:677
Code: ff e8 20 7d 2c 00 48 c7 c7 20 45 49 87 e8 f8 e3 16 00 0f 0b e9 34 4b ff ff e8 08 7d 2c 00 48 c7 c7 20 45 49 87 e8 e0 e3 16 00 <0f> 0b e9 c5 4a ff ff e8 f0 7c 2c 00 48 c7 c7 20 45 49 87 e8 c8 e3
RSP: 0018:ffff88809a11f9b8 EFLAGS: 00010082
RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8155dbd6 RDI: ffffed1013423f29
RBP: ffff88809a11f9e0 R08: 0000000000000024 R09: ffffed1015d05079
R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: ffff888051416500
R13: ffff88808543aec0 R14: dffffc0000000000 R15: ffff8880514173c0
 put_task_struct include/linux/sched/task.h:96 [inline]
 perf_event_exit_task_context kernel/events/core.c:11158 [inline]
 perf_event_exit_task+0x937/0xbc0 kernel/events/core.c:11207
 do_exit+0x9a4/0x2fa0 kernel/exit.c:885
 do_group_exit+0x135/0x370 kernel/exit.c:979
 get_signal+0x3ec/0x1fc0 kernel/signal.c:2574
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a09
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:00007f67bf4bfcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459a09
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00007ffde133f04f R14: 00007f67bf4c09c0 R15: 000000000075bf2c

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