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Thu, 27 Aug 2026 05:43:40 +0000 (GMT) Received: from [9.67.79.223] (unknown [9.67.79.223]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 27 Aug 2026 05:43:40 +0000 (GMT) Message-ID: Date: Thu, 27 Aug 2026 11:13:39 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: linuxppc-dev , tglx@kernel.org, maddy@linux.ibm.com, christophe.leroy@csgroup.eu, riteshh@linux.ibm.com From: Shivaprasad G Bhat Subject: powerpc: userspace processes crash on abort() from libc.so.6 Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: rlnnksVDgoov12X-Qr3QaOX5eVkfsAvr X-Proofpoint-ORIG-GUID: rlnnksVDgoov12X-Qr3QaOX5eVkfsAvr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI3MDA0MyBTYWx0ZWRfX/19EjURAiiBf ufEkrl3VCiUfazHt3bTt7zOCYxeATyqbb06sjy7wMi0LzRoV43rQD47ALDvCUka3HekodM2vJ83 i604Y51yx+lnbhwU81STOny0mQGH1VpqJW1nT9kzRLoVaOhODMp3SslnnIG+apXN7/JSt3FnUkx 6icNSWTgtZq2wtsRCzAyoLpRW2PN5kKza7rXpUMmOmXs9wJmMw5oBAuUxV61a1ypM24+MZsOdpc YQz4ar37xvcdkpyVmdPjlHXAs84N29YANw/4CuSZPQITNmetHbGhzPRTPY6ui5L5jr7OCTQLuBG Esb/KiTFcMr1hAG5917g9cJEeNLT3AUtAU5LpSNYvSGonM6k7J5xNt8vK41v167sXArzGGWyhyM k/i7SRBvtiNDWwrFH1cQyb0EcorUVBCl1/XpXY7j7EjtfV9oiBrWONuWgRHtmwAFy3lc3WjYXXY fBkNfYiEvlm7/H8EwxQ== X-Authority-Analysis: v=2.4 cv=QsRuG1yd c=1 sm=1 tr=0 ts=6a8fce94 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=NEAV23lmAAAA:8 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=ihYbd9jE9oaAB4i0KMUA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI3MDA0MyBTYWx0ZWRfX3M467djiF2Oo vIjtuB26kCuaELUFieeDl+/FALnScvE56SRgsPcxzMoQKRFvAz47VUtPiiGDpsvZvSh+69xec0T LD6CJ0/8vWTymIQ94Pua2Lm23Cr0ncs= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-27_02,2026-08-26_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 spamscore=0 lowpriorityscore=0 clxscore=1011 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608270043 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.