runtime: [x64/CentOS7] createdump failing with message: terminate called after throwing an instance of 'PAL_SEHException'

Environment:

Dotnet runtime 2.1.4
CentOS 7

I am trying to create a memory dump of a live .Net Core process. Unfortunately createdump itself crashs:

Writing minidump to file /tmp/coredump.58593
terminate called after throwing an instance of 'PAL_SEHException'
Aborted

The crash is not dependent of the createdump option (same crash with -n and -h)

This issue is hard to reproduce since it doesn’t occur on all .Net core applications. It may be related to the fact that I am using GRPC since when I remove the use of it from my code it looks like it works… (but I could not isolate the issue on a single application using GRPC so I am not sure about that)

I used LLDB in order to investigate the issue and I find out that we have an invalid address use:

* thread dotnet/coreclr#1, name = 'createdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x30)
    frame #0: 0x00007ffff7a17890 libmscordaccore.so`MetaSig::Reset()
libmscordaccore.so`MetaSig::Reset:
->  0x7ffff7a17890 <+0>:  movl   0x30(%rdi), %eax
    0x7ffff7a17893 <+3>:  movl   %eax, 0x40(%rdi)
    0x7ffff7a17896 <+6>:  movq   0x28(%rdi), %rax
    0x7ffff7a1789a <+10>: movq   %rax, 0x38(%rdi)

with the call stack:

* thread dotnet/coreclr#1, name = 'createdump', stop reason = signal SIGSEGV: invalid address (fault address: 0x30)
  * frame #0: 0x00007ffff7a17890 libmscordaccore.so`MetaSig::Reset()
    frame dotnet/coreclr#1: 0x00007ffff7967391 libmscordaccore.so`ClrDataFrame::ValueFromDebugInfo(MetaSig*, bool, unsigned int, unsigned int, IXCLRDataValue**) + 337
    frame dotnet/coreclr#2: 0x00007ffff7968438 libmscordaccore.so`ClrDataFrame::GetExactGenericArgsToken(IXCLRDataValue**) + 200
    frame dotnet/coreclr#3: 0x00007ffff78de62f libmscordaccore.so`ClrDataAccess::EnumMemWalkStackHelper(CLRDataEnumMemoryFlags, IXCLRDataStackWalk*, Thread*) + 2655
    frame dotnet/coreclr#4: 0x00007ffff78db1b2 libmscordaccore.so`ClrDataAccess::EnumMemDumpAllThreadsStack(CLRDataEnumMemoryFlags) + 3026
    frame dotnet/coreclr#5: 0x00007ffff78df14f libmscordaccore.so`ClrDataAccess::EnumMemoryRegionsWorkerSkinny(CLRDataEnumMemoryFlags) + 127
    frame dotnet/coreclr#6: 0x00007ffff78e14ca libmscordaccore.so`ClrDataAccess::EnumMemoryRegionsWrapper(CLRDataEnumMemoryFlags) + 122
    frame dotnet/coreclr#7: 0x00007ffff78e1750 libmscordaccore.so`ClrDataAccess::EnumMemoryRegions(ICLRDataEnumMemoryRegionsCallback*, unsigned int, CLRDataEnumMemoryFlags) + 224
    frame dotnet/coreclr#8: 0x000000000040776b createdump`CrashInfo::EnumerateMemoryRegionsWithDAC(_MINIDUMP_TYPE) + 219
    frame dotnet/coreclr#9: 0x00000000004063f7 createdump`CrashInfo::GatherCrashInfo(_MINIDUMP_TYPE) + 663
    frame dotnet/coreclr#10: 0x0000000000405693 createdump`CreateDumpCommon(char const*, _MINIDUMP_TYPE, CrashInfo*) + 179
    frame dotnet/coreclr#11: 0x00000000004054ee createdump`main + 606
    frame dotnet/coreclr#12: 0x00007ffff6cb7c05 libc.so.6`__libc_start_main + 245
    frame dotnet/coreclr#13: 0x00000000004051c9 createdump