Re: git: 64a73d1b6dc9 - main - amd64/*sigtramp.S: re-enable some cfi annotations for special registers

On Wed, Sep 23, 2026 at 09:37:06AM +0200, Herbert J. Skuhra wrote:
> On Mon, 21 Sep 2026 20:26:56 +0200, Konstantin Belousov wrote:
> > 
> > The branch main has been updated by kib:
> > 
> > URL: https://cgit.FreeBSD.org/src/commit/?id=64a73d1b6dc93d92daea1e2d0603fda1dddadf4a
> > 
> > commit 64a73d1b6dc93d92daea1e2d0603fda1dddadf4a
> > Author:     Konstantin Belousov <kib@FreeBSD.org>
> > AuthorDate: 2026-09-19 09:46:19 +0000
> > Commit:     Konstantin Belousov <kib@FreeBSD.org>
> > CommitDate: 2026-09-21 18:25:38 +0000
> > 
> >     amd64/*sigtramp.S: re-enable some cfi annotations for special registers
> >     
> >     Also explicitly specify .cfi_sections to emit the cfi bytecode into the
> >     loadable .eh_frame section.
> >     
> >     Reviewed by:    mchoo
> >     Sponsored by:   The FreeBSD Foundation
> >     MFC after:      1 week
> >     Differential revision:  https://reviews.freebsd.org/D59838
> > ---
> >  sys/amd64/amd64/sigtramp.S     | 44 ++++++++++++++++++++++++++----------------
> >  sys/amd64/ia32/ia32_sigtramp.S | 19 ++++++++++++------
> >  2 files changed, 40 insertions(+), 23 deletions(-)
> 
> After this commit I get:
> 
> Sep 23 09:18:52 srv01 kernel: pid 79694 (tmux), jid 0, uid 1001: exited on signal 11 (core dumped)
> Sep 23 09:18:56 srv01 sshd-session[78306]: error: mm_reap: child terminated by signal 11
> Sep 23 09:18:57 srv01 kernel: pid 78765 (sshd-session), jid 0, uid 1001: exited on signal 11 (no core dump - sugid process denied by kern.sugid_coredump)
> Sep 23 09:18:57 srv01 kernel: pid 70073 (sshd), jid 0, uid 0: exited on signal 11 (no core dump - sugid process denied by kern.sugid_coredump)
> 
> This is a (K)VM.

How did you determined that the commit is the problem?
The change you cited did not modified a single executable instruction.