Re: segfault with latest arm64 linux kernel build

On 17/06/2026 14:58, Ben Dooks wrote:
> I'm getting a fault running the sparse check on current kernel.
> 
>    CC [M]  drivers/gpu/drm/msm/msm_gem.o
>    CHECK   /home/ben/linux/drivers/gpu/drm/msm/msm_gem.c
> Segmentation fault
> 
> The base of my tree is, however I have a pile of fixes
> on this:
> 
> commit 4b99990cdf9560e8a071640baf19f312e6ae02f4 (origin/master, origin/ 
> HEAD)
> Merge: 9c87e61e3c57 52d4ab1ca790
> Author: Linus Torvalds <[email protected]>
> Date:   Wed Jun 17 10:21:00 2026 +0100
> 
>      Merge tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/ 
> drm/kernel

I did get a coredump, and the error is at:

> 0  simplify_cgoto (insn=0x7f5fb0ab5240) at simplify.c:2737
> 2737                    if (!target->ep)
> (gdb) 
> (gdb) backtrace
> #0  simplify_cgoto (insn=0x7f5fb0ab5240) at simplify.c:2737
> #1  simplify_instruction (insn=0x7f5fb0ab5240) at simplify.c:2850
> #2  0x0000563adaef4e30 in clean_up_insns (ep=0x7f5fb0b48198) at optimize.c:42
> #3  optimize (ep=ep@entry=0x7f5fb0b48198) at optimize.c:98
> #4  0x0000563adaef49ae in linearize_fn (sym=0x2, base_type=<optimized out>) at linearize.c:2577
> #5  linearize_symbol (sym=sym@entry=0x7f5fa9cc1b30) at linearize.c:2593
> #6  0x0000563adaee7c2a in check_symbols (list=<optimized out>) at sparse.c:306
> #7  0x0000563adaee779d in main (argc=<optimized out>, argv=<optimized out>) at sparse.c:332


Not had time to go look into this further

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Ben Dooks				http://www.codethink.co.uk/
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