CVS commit: src/sys/fs/union

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Tue Aug 18 09:44:07 UTC 2020

Modified Files:
        src/sys/fs/union: union.h union_subr.c union_vnops.c

Log Message:
Operation union_readdirhook() stores the lower directory as un_uppervp.
This breaks the assumption that un_uppervp->v_mount is the upper mount.

Fix by storing the directory as un_lowervp and adapt union_readdir().

Should fix PR kern/55552: panic with union mount


To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/fs/union/union.h
cvs rdiff -u -r1.78 -r1.79 src/sys/fs/union/union_subr.c
cvs rdiff -u -r1.73 -r1.74 src/sys/fs/union/union_vnops.c

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