Clearing flags...Error: lchflags(/usr/bin/su): errno 1

[kravietz]

Getting this on 14.2 upgrade:

# freebsd-rustdate install
Installing pending upgrade from 14.1-RELEASE-p6 to 14.2-RELEASE
Checking required files are present...   5581 hashfiles...  Ok.
Creating snapshot of existing boot environment: (14.1-RELEASE-p6_2025-01-07_113636)...  Done.
Checking file flags (7649 paths to scan)
████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████ 0s 7,649/7,64912 +schg files found.  Clearing flags...Error: lchflags(/usr/bin/su): errno 1

Likely caused by this:

# sysctl kern.securelevel
kern.securelevel: 1

For contrast, freebsd-update will refuse to run when kern.securelevel > 0, likely to prevent such issues.