Bug 60832 - Mono crashed (SIGSEGV) in desc_alloc
Summary: Mono crashed (SIGSEGV) in desc_alloc
Status: NEW
Alias: None
Product: Runtime
Classification: Mono
Component: GC ()
Version: 5.4 (2017-06)
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-11-23 12:04 UTC by Nikita Prianichnikov
Modified: 2017-11-24 11:14 UTC (History)
5 users (show)

Is this bug a regression?: ---
Last known good build:

crash_logs (3.07 MB, text/plain)
2017-11-23 12:04 UTC, Nikita Prianichnikov

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Description Nikita Prianichnikov 2017-11-23 12:04:03 UTC
Created attachment 25815 [details]

Mono crashing in GC code. Please see the attachment for the stacktrace. Unfortunately, this issue is hard to reproduce, because this happens when our program processes bid dataset, about half of a terabyte. SIGSEGV happens when mono eats ~14GB RAM. We tried MONO_GC_PARAMS=max-heap-size=32G - same issue. 
OS: Ubuntu 16.04.3 LTS (x64)
Mono version:
Comment 1 Ludovic Henry 2017-11-24 01:10:40 UTC
Vlad, the crash is at https://github.com/mono/mono/blob/2017-06/mono/utils/lock-free-alloc.c?utf8=%E2%9C%93#L147, do you think it's possible that `mono_valloc` or `mono_valloc_aligned` return NULL? What more information would you need to diagnose this bug?