Re: Segfault during build of accf_dns.ko.full

On Sat, Nov 07, 2026 at 04:30:34PM -0500, Michael Butler wrote:
> On 11/7/26 13:35, David Wolfskill wrote:
> > This has now happened for 2 (different, but still amd64/GENERIC)
> > machines, so it appears to be reproducible.
> > 
> > The first was a 32-core headless build machine; the second is a laptop.
> > In each case, the machine had been running main-n290715-feab010f4414
> > (product of yesterday's daily tracking) and the sources had been updated
> > to main-n290746-6d5c80aee3ae this morning; "make buildworld" had
> > succeeded, and "make buildkernel" was in progress.
> > 
> > The build typescript from each machine shows:
> > ...
> > > > > stage 1: configuring the kernel
> > ...
> > > > > stage 2.3: build tools
> > ...
> > > > > stage 3.1: building everything
> > ...
> > *** [accf_data.ko.full] Error code 139
> > make[4]: *** accf_data.ko.full removed
> > ...
> > make[4]: stopped making "all" in /usr/src/sys/modules/accf_data
> > .ERROR_TARGET='accf_data.ko.full'
> > .ERROR_META_FILE='/common/S4/obj/usr/src/amd64.amd64/sys/GENERIC/modules/usr/src/sys/modules/accf_data/accf_data.ko.full.meta'
> > .MAKE.LEVEL='4'
> > MAKEFILE=''
> > .MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
> > _ERROR_CMD='ld -m elf_x86_64_fbsd -warn-common --build-id=sha1 -T /usr/src/sys/conf/ldscript.kmod.amd64 -r  -o accf_data.ko.full accf_data.o ; ctfmerge -L VERSION -g -o accf_data.ko.full accf_data.o ; :> export_syms; awk -f /usr/src/sys/conf/kmod_syms.awk accf_data.ko.full  export_syms | xargs -J % objcopy % accf_data.ko.full;'
> > ....
> > 
> > The ERROR_META_FILE has:
> > 
> > # Meta data file /common/S4/obj/usr/src/amd64.amd64/sys/GENERIC/modules/usr/src/sys/modules/accf_data/accf_data.ko.full.meta
> > CMD ld -m elf_x86_64_fbsd -warn-common --build-id=sha1 -T /usr/src/sys/conf/ldscript.kmod.amd64 -r  -o accf_data.ko.full accf_data.o
> > CMD ctfmerge -L VERSION -g -o accf_data.ko.full accf_data.o
> > CMD :> export_syms
> > CMD awk -f /usr/src/sys/conf/kmod_syms.awk accf_data.ko.full  export_syms | xargs -J % objcopy % accf_data.ko.full
> > CWD /common/S4/obj/usr/src/amd64.amd64/sys/GENERIC/modules/usr/src/sys/modules/accf_data
> > TARGET accf_data.ko.full
> > OODATE accf_data.o
> > -- command output --
> > Segmentation fault
> > 
> > *** Error code 139
> > 
> > -- filemon acquired metadata --
> > ....
> > 
> > I will attach a copy of the file 9from the headless build machine)
> > for reference.
> > 
> > Oh: I see that the typescripts are now showing a warning that I had not
> > recalled seeing until recently -- e.g.:
> > 
> > make[1]: /usr/src/Makefile.inc1:380: warning: Warning: buildkernel should not be run as root
> > 
> > Peace,
> > david
> 
> I also ran into this but haven't determined the commit that triggered it.
> 
> As a workaround,  I added " WITHOUT_CTF=1" to /etc/make.conf to allow builds
> to complete,

Completely remove the object directory and update past 9dae9b31d2c7834d.
If it does not help, get the backtrace.