CVS commit: src/sys/kern

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sun Jun 13 00:11:46 UTC 2021

Modified Files:
        src/sys/kern: subr_autoconf.c

Log Message:
autoconf(9): Sprinkle KASSERT(dev->dv_pending == 0) in dealloc paths.

This would have made uhub's config_pending_incr leak more obvious by
crashing in KASSERT(dev->dv_pending == 0) early on, rather than
crashing in a tailq panic later on when the config_pending list gets
corrupted with use-after-free because nothing took the device off
dv_pending_list when attached.

(This is slightly academic now because config_detach blocks until
dev->dv_pending == 0, but it doesn't hurt and makes the intent
clearer.)


To generate a diff of this commit:
cvs rdiff -u -r1.285 -r1.286 src/sys/kern/subr_autoconf.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.