Bug 25243

Note that this one is also already in Cauldron since ~5 days, so it's already being heavily used without issues

This was also used to build the kernel-5.2.7-1 update

Advisory, added to svn:

type: bugfix
subject: Updated gcc packages fix various bugs and compiler crashes
src:
  7:
   core:
     - gcc-8.3.1-0.20190802.1.mga7
description: |
  This provides an updated snapshot of the gcc 8.3.1 compiler set, fixing
  various bugs, mis-compilations and ICE (Intenal Compiler Error) crashes.
  It also adds needed fixes to be able to build the 5.2 series kernels.
references:
 - https://bugs.mageia.org/show_bug.cgi?id=25243

Keywords: (none) => advisory

mga7, x86_64

Started to install missing pakages (before the update) and hit:
A requested package cannot be installed:
libstdc++6-8.3.1-0.20190524.1.mga7.x86_64 (in order to keep libstdc++6-8.3.1-0.20190802.1.mga7.x86_64)

That was pulled in during a recent update test - don't remember which one.
Successfully updated everything else from updates testing.

Noting that this version is already being used successfully tried a local build of celestia, which involves hundreds of C file compilations, a smattering of C++, and one or two other types.  No problems encountered.
................
+ /usr/bin/rm -rf /home/lcl/testing/celestia/BUILDROOT/celestia-1.7.0-0.20190423git.920a0c8.2.mga7.x86_64
+ exit 0
succeeded!

$ tree RPMS
RPMS
├── noarch
│   └── celestia-data-1.7.0-0.20190423git.920a0c8.2.mga7.noarch.rpm
└── x86_64
    ├── celestia-1.7.0-0.20190423git.920a0c8.2.mga7.x86_64.rpm
    ├── celestia-debuginfo-1.7.0-0.20190423git.920a0c8.2.mga7.x86_64.rpm
    └── celestia-debugsource-1.7.0-0.20190423git.920a0c8.2.mga7.x86_64.rpm

OK for QA too.

CC: (none) => tarazed25
Whiteboard: (none) => MGA7-64-OK

Addendum to comment 4:

Harking back to earlier experiments with ASAN, this snippet from Wikipedia works.

// https://en.wikipedia.org/wiki/AddressSanitizer
// To compile: g++ -O -g -fsanitize=address -o boom boom.cc
int main(int argc, char **argv) {

  int *array = new int[100];

  delete [] array;

  return array[argc];  // BOOM
}

$ ./boom
=================================================================
==27851==ERROR: AddressSanitizer: heap-use-after-free on address 0x614000000044 at pc 0x0000004011a4 bp 0x7fff248d2ec0 sp 0x7fff248d2eb8
READ of size 4 at 0x614000000044 thread T0
    #0 0x4011a3 in main /home/lcl/qa/asan/test.c:9
    #1 0x7f5016d8db0a in __libc_start_main (/lib64/libc.so.6+0x26b0a)
    #2 0x4010a9 in _start (/data/qa/asan/boom+0x4010a9)

0x614000000044 is located 4 bytes inside of 400-byte region [0x614000000040,0x6140000001d0)
freed by thread T0 here:
    #0 0x7f50172fee90 in operator delete[](void*) (/lib64/libasan.so.5+0xebe90)
    #1 0x40116e in main /home/lcl/qa/asan/test.c:7

previously allocated by thread T0 here:
    #0 0x7f50172fe140 in operator new[](unsigned long) (/lib64/libasan.so.5+0xeb140)
    #1 0x401163 in main /home/lcl/qa/asan/test.c:5

SUMMARY: AddressSanitizer: heap-use-after-free /home/lcl/qa/asan/test.c:9 in main
Shadow bytes around the buggy address:
  0x0c287fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c287fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c287fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c287fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c287fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c287fff8000: fa fa fa fa fa fa fa fa[fd]fd fd fd fd fd fd fd
  0x0c287fff8010: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c287fff8020: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0c287fff8030: fd fd fd fd fd fd fd fd fd fd fa fa fa fa fa fa
  0x0c287fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c287fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==27851==ABORTING

Validating, on the basis of Len's tests and tmb's comments.

Keywords: (none) => validated_update
CC: (none) => andrewsfarm, sysadmin-bugs

An update for this issue has been pushed to the Mageia Updates repository.

https://advisories.mageia.org/MGAA-2019-0098.html

Resolution: (none) => FIXED
Status: NEW => RESOLVED