powerpc: userspace processes crash on abort() from libc.so.6

Hi All, Thomas,

On my PPC64 machine, I see the below systemd crash orginating from 
abort() during boot on top of the tree. Complete dmesg can be seen here [1]
       abort (libc.so.6 + 0x29484) 

       __libc_message_impl (libc.so.6 + 0x9e00c) 

       __libc_fatal (libc.so.6 + 0x9e06c) 

       start_thread (libc.so.6 + 0xadffc) 

       __clone (libc.so.6 + 0x152d68) 

       __clone (libc.so.6 + 0x152d68) 

       create_thread.constprop.0 (libc.so.6 + 0xad9c8) 


The git bisect pointed me to commit 3424d8c18a7da "(Merge tag 
'core-entry-2026-08-17' of 
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip)"

Please find the kernel config used to build the kernel at [2].

I have tried applying the pending fixes from Mukesh [3] and Ritesh [4] 
for the currently outstanding issues and still see the problem.

The system is running Fedora 42, with glibc-2.41-7.fc42.ppc64le. The
complete list of toolchain and packages can be found here [5]

Thanks and Regards,
Shivaprasad

References:
1 - https://gist.github.com/shivaprasadbhat/6f166374bab12b4f4c1cd4ac829e562c
2 - https://gist.github.com/shivaprasadbhat/aa499468e124015eec5932fb13e88e05
3 - https://lore.kernel.org/linuxppc-dev/[email protected]/#t
4 - 
https://lore.kernel.org/linuxppc-dev/[email protected]/
5 - https://gist.github.com/shivaprasadbhat/ae56ca849c3009e8642a6313dc465ea7

=========
Backtrace from dmesg:
[   22.039343][ T1833] systemd-coredump[1833]: Module 
libsystemd-shared-257.6-1.fc42.so from rpm systemd-257.6-1.fc42.ppc64le
[   22.039378][ T1833] systemd-coredump[1833]: Stack trace of thread 1828:
[   22.039378][ T1833] systemd-coredump[1833]: Stack trace of thread 1828:
[   22.039401][ T1833] systemd-coredump[1833]: #0  0x00007fffa4c29484 
abort (libc.so.6 + 0x29484)
[   22.039401][ T1833] systemd-coredump[1833]: #0  0x00007fffa4c29484 
abort (libc.so.6 + 0x29484)
[   22.039429][ T1833] systemd-coredump[1833]: #1  0x00007fffa4c9e00c 
__libc_message_impl (libc.so.6 + 0x9e00c)
[   22.039429][ T1833] systemd-coredump[1833]: #1  0x00007fffa4c9e00c 
__libc_message_impl (libc.so.6 + 0x9e00c)
[   22.039461][ T1833] systemd-coredump[1833]: #2  0x00007fffa4c9e06c 
__libc_fatal (libc.so.6 + 0x9e06c)
[   22.039461][ T1833] systemd-coredump[1833]: #2  0x00007fffa4c9e06c 
__libc_fatal (libc.so.6 + 0x9e06c)
[   22.039491][ T1833] systemd-coredump[1833]: #3  0x00007fffa4cadffc 
start_thread (libc.so.6 + 0xadffc)
[   22.039491][ T1833] systemd-coredump[1833]: #3  0x00007fffa4cadffc 
start_thread (libc.so.6 + 0xadffc)
[   22.039521][ T1833] systemd-coredump[1833]: #4  0x00007fffa4d52d68 
__clone (libc.so.6 + 0x152d68)
[   22.039521][ T1833] systemd-coredump[1833]: #4  0x00007fffa4d52d68 
__clone (libc.so.6 + 0x152d68)
[   22.039551][ T1833] systemd-coredump[1833]: #5  0x00007fffa4d52d68 
__clone (libc.so.6 + 0x152d68)
[   22.039551][ T1833] systemd-coredump[1833]: #5  0x00007fffa4d52d68 
__clone (libc.so.6 + 0x152d68)
[   22.039580][ T1833] systemd-coredump[1833]: #6  0x00007fffa4cad9c8 
create_thread.constprop.0 (libc.so.6 + 0xad9c8)
[   22.039580][ T1833] systemd-coredump[1833]: #6  0x00007fffa4cad9c8 
create_thread.constprop.0 (libc.so.6 + 0xad9c8)
[   22.039614][ T1833] systemd-coredump[1833]: #7  0x00000000003af858 
n/a (n/a + 0x0)
[   22.039614][ T1833] systemd-coredump[1833]: #7  0x00000000003af858 
n/a (n/a + 0x0)
[   22.039639][ T1833] systemd-coredump[1833]: ELF object binary 
architecture: PowerPC64
[   22.039639][ T1833] systemd-coredump[1833]: ELF object binary 
architecture: PowerPC64
[   22.042109][    T1] systemd[1]: systemd-journald.service: Scheduled 
restart job, restart counter is at 1.