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Bug 1579739 - glibc: Fix stack overflow with huge PT_NOTE segment
glibc: Fix stack overflow with huge PT_NOTE segment
Status: NEW
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: glibc (Show other bugs)
7.5
All Linux
low Severity low
: rc
: ---
Assigned To: glibc team
qe-baseos-tools
: Patch
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2018-05-18 04:36 EDT by Florian Weimer
Modified: 2018-05-18 23:40 EDT (History)
6 users (show)

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Tracker ID Priority Status Summary Last Updated
Sourceware 20419 None None None 2018-05-18 04:36 EDT

  None (edit)
Description Florian Weimer 2018-05-18 04:36:01 EDT
Certain Rust binaries used to trigger this (but Rust has since installed a workaround).  Upstream fix:

Upstream fix:

commit 0065aaaaae51cd60210ec3a7e13dddd8e01ffe2c
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date:   Sat May 5 18:08:27 2018 -0700

    Fix BZ 20419.  A PT_NOTE in a binary could be arbitratily large, so using
    alloca for it may cause stack overflow.  If the note is larger than
    __MAX_ALLOCA_CUTOFF, use dynamically allocated memory to read it in.

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