[Bug malloc/32996] malloc regression on i686

ak@almao.bar ak@almao.bar
Sun May 25 19:20:31 GMT 2025


I have send in my secound rapport on opperational vurnabilities, conserning the severity of this. 
> On 05/25/2025 8:08 PM CEST priv.luk at gmail dot com via Glibc-bugs <glibc-bugs@sourceware.org> wrote:
> 
>  
> https://sourceware.org/bugzilla/show_bug.cgi?id=32996
> 
> --- Comment #1 from Łukasz Patron <priv.luk at gmail dot com> ---
> Also, here are the instructions for quick repro:
> 
> mock -r fedora-rawhide-i386 -n --dnf-cmd install dnf5 git python-pyside6
> mock -r fedora-rawhide-i386 -n --enable-network --shell
> python3 /usr/lib/python3.13/site-packages/PySide6/support/generate_pyi.py
> --outpath . QtGui
> 
> Running all of these results in:
> 
> <mock-chroot> sh-5.2# python3
> /usr/lib/python3.13/site-packages/PySide6/support/generate_pyi.py --outpath .
> QtGui 
> Segmentation fault (core dumped)
> 
> and
> 
> <mock-chroot> sh-5.2# python3
> /usr/lib/python3.13/site-packages/PySide6/support/generate_pyi.py --outpath .
> QtGui 
> INFO:generate_pyi:Generated: QtGui.pyi
> 
> after I installed rawhide glibc with the following reverts in .spec:
> 
> Patch: 0001-Revert-malloc-Improve-malloc-initialization.patch
> Patch: 0002-Revert-malloc-Improved-double-free-detection-in-the-.patch
> Patch: 0003-Revert-malloc-Inline-tcache_try_malloc.patch
> Patch: 0004-Revert-malloc-move-tcache_init-out-of-hot-tcache-pat.patch
> Patch: 0005-Revert-malloc-Use-tailcalls-in-__libc_free.patch
> Patch: 0006-Revert-malloc-Inline-tcache_free.patch
> Patch: 0007-Revert-malloc-Improve-free-checks.patch
> Patch: 0008-Revert-malloc-Inline-_int_free_check.patch
> Patch: 0009-Revert-malloc-Inline-_int_free.patch
> Patch: 0010-Revert-malloc-Move-mmap-code-out-of-__libc_free-hotp.patch
> Patch: 0011-Revert-malloc-Improve-performance-of-__libc_malloc.patch
> Patch: 0012-Revert-malloc-Use-__always_inline-for-simple-functio.patch
> Patch: 0013-Revert-malloc-Use-_int_free_chunk-for-remainders.patch
> 
> -- 
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