[BUG] powerpc: userspace processes crash in ld64.so.2 when running recent linux-next kernels

Hi,

We are seeing random userspace crashes while building the kernel on
ppc64le when running recent upstream/mainline or linux-next kernels.

The failures occur in different userspace programs, but the crash
signature is consistently inside ld64.so.2.

Environment
-----------

Architecture:
   ppc64le

Platform:
   IBM Power systems (LPAR)

Userspace:
   RHEL userspace

Workload:
   Kernel build

     make -j32 -s && make modules_install && make install


gcc version 14.3.1 20251022 (Red Hat 14.3.1-4) (GCC)

GNU ld version 2.41-63.el10
ldd (GNU libc) 2.39




Observation
-----------

The issue is observed when the system is booted with recent upstream
kernels.

The same LPAR, userspace, toolchain, and source tree are able to build
successfully when booted with the base OS kernel.

Typical failures include:

   sh
   fixdep
   make

The source file being compiled when the failure occurs varies from run
to run.

Examples
--------

Example 1:

[ 1277.872746] fixdepsegfault (11) at 29ac0
[ 1277.872746] fixdep[122982]: nip 3fffbebd8214 lr 3fffbebd7358
[ 1277.872746] fixdep[122982]: code 1 in ld64.sofffbeba1000+50000]

[ 1277.872793] fixdepcode:
f90104a8 7ce903a6 f9410060 f9490008
f9490010 f9490018 39290020 f9490000

[ 1277.872805] fixdep[122982[37214,3fffbeba1000+50000 f9490018 
<ea628000> 7e731050 f9410030 fa610020

cripts/Makefile.build:289:
drivers/gpu/drm/amd/amdgpu/../pm/powerplay/smumgr/vegam_smumgr.o]
Error 139

Example 2:

[Sun Aug 2 12:36:38 2026] sh[115552]: segfaultbcd0
nip 3fffbd73d004 lr 3fffbd73c148 code 1 in
ld64.so.2[35004,3fffbd708000+4d000]

Example 3:

[Sun Aug 2 12:40:08 2026] fixdep[134469]: segfault (11) at 2bcd0c3ca004 
lr 3fff8c3c9148 code 1 in
ld64.so.2[35004,3fff8c395000+4d000]

Example 4:

[Mon Aug 3 05:44:20 2026] make[600291]: segfault (11) ip 3fffaf3b5004 lr 
3fffaf3b4148 code 1 in
ld64.so.2[35004,3fffaf380000+4d000]

Notes
-----

- The crashing executable varies (sh, fixdep, make, etc.).
- The object file being compiled also varies.
- The crash always appears to occur in ld64.so.2.
- The issue has been observed on more than one system.
- A fresh OS installation with ample free memory reproduces the issue.

Let me know, if any more info is needed.

If you happen to fix this issue, please add below tag.

Reported-by: Venkat Rao Bagalkote <redacted>





Thanks,
Venkat.