FreeBSD 15.0-RC3 boot failed after install kernel

Hi All

Current version: FreeBSD 14.3-RELEASE-p3 amd64.
I'm tried to FreeBSD 15.0-RC3 amd64 with source (branch: releng/15.0).
After build/install kernel and reboot, I couldn't login regular user and root. (Back to login prompt after input password)

In /var/log/message have example strange error message as follows..
Code:
Nov 22 13:04:26 epopen kernel: [256] pid 24 (login), jid 0, uid 0: exited on signal 12 (core dumped)
Nov 22 13:05:00 epopen kernel: [289] pid 32 (cron), jid 0, uid 0: exited on signal 12 (no core dump - sugid process denied by kern.sugid_coredump)
Nov 22 13:05:00 epopen kernel: [289] pid 43086 (cron), jid 0, uid 0: exited on signal 12 (core dumped)
Detail log: https://sharetext.io/b0c1b8f5

Test item:
  1. In other thread talking about login failed due bash.
    Here, I using csh with regular user and root, replaced by sh failed still.
  2. Kernel config roll back to work fine current 14.3-Release failed still.
Look like ABI dismatch?
No idea this problem occur in 15.0-Release or not, therefore post the problem first.
Can help to fix or waiting official 15.0-Release?

Thanks a lot.
 
This is not related to 3rd party ports/packages.

After build/install kernel and reboot, I couldn't login regular user and root. (Back to login prompt after input password)
  • How did you build the kernel exactly? Note that "buildkernel" requires here "buildworld" or "kernel-toolchain" first ( build(7) ).
  • Are there any build variables set in /etc/make.conf , /etc/src.conf , /etc/src-env.conf ?
I did a test 15.0-RC3 kernel build, running on a 14.3 userland, no problem her, root and user log in normally:
Code:
#  uname  -a
FreeBSD pmaster.home 15.0-RC3 FreeBSD 15.0-RC3 releng/15.0-n280974-4579378a950f GENERIC amd64

# uname -KU
1500068 1403000

% freebsd-version -kru
15.0-RC3
15.0-RC3
14.3-RELEASE-p5

Eventually try https://download.freebsd.org/releases/amd64/15.0-RC3/kernel.txz . Copy the 14.3 /boot/kernel to /boot/kernel143, untar 15.0-RC3 kernel.

The original 14.3 kernel should be bootable from the FreeBSD boot menu (Options: 6. Kernel ), if it's not: https://download.freebsd.org/releases/amd64/14.3-RELEASE/kernel.txz
 
Hi T-Daemon
How did you build the kernel exactly? Note that "buildkernel" requires here "buildworld" or "kernel-toolchain" first ( build(7) ).
Yes, I follows 26.6.1. Quick Start
Build commit is
Code:
commit 4579378a950faa193f2607af55a2b5538e773cb4
Author: Colin Percival <cperciva@FreeBSD.org>
Date:   Fri Nov 21 00:00:00 2025 +0000

    15.0: Update to RC3
Before # make -j4 kernel, ran # make -j4 buildworld 10 hours😆

Are there any build variables set in /etc/make.conf , /etc/src.conf , /etc/src-env.conf ?
Yes, please reference follows link.
  1. /etc/make.conf
  2. /etc/src.conf
  3. in /etc/src-env.conf, only WITH_META_MODE=yes
  4. Kernel config @ 15-RC3 and Kernel config of current work fine @ 14.3-RELEASE
    Both failed @ 15-RC3
Because I control server remotely right now,
Possible to try https://download.freebsd.org/releases/amd64/15.0-RC3/kernel.txz or build whole 15-Release from source at 2025/12/31 vacation.😆

Thanks you a lot.
 
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