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

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From: Shivaprasad G Bhat <sbhat@linux.ibm.com>
To: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	tglx@kernel.org, maddy@linux.ibm.com,
	christophe.leroy@csgroup.eu, riteshh@linux.ibm.com
Cc: linux-kernel@vger.kernel.org
Subject: powerpc: userspace processes crash on abort() from libc.so.6
Date: Thu, 27 Aug 2026 11:13:39 +0530	[thread overview]
Message-ID: <e301014d-568f-4ed5-bc64-b8a85ca0b1e1@linux.ibm.com> (raw)


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/lda1jyut.ritesh.list@gmail.com/#t
4 - 
https://lore.kernel.org/linuxppc-dev/20260820134718.2176411-1-mkchauras@gmail.com/
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.

next             reply	other threads:[~2026-08-27  5:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-27  5:43 Shivaprasad G Bhat [this message]
2026-08-27 11:38 ` Shrikanth Hegde
2026-08-27 14:16   ` Shivaprasad G Bhat

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