CVS commit: [netbsd-8] src/sys/kern

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue Jan  7 11:59:49 UTC 2020

Modified Files:
        src/sys/kern [netbsd-8]: kern_ksyms.c

Log Message:
Pull up following revision(s) (requested by pgoyette in ticket #1482):

        sys/kern/kern_ksyms.c: revision 1.88 (patch)

When reading from /dev/ksyms we need to skip over entries that have
been marked as sd_gone.  Otherwise we might try to uiomove() data from
memory that has been unmapped, resulting in EFAULT.

XXX This (along with other pre-existing checks st->sd_gone) is still
racy, but it's an improvement over current code.  Ideally we would
make a complete copy of the symbol table when we open /dev/ksyms so
we could ignore any changes that occur.

ad@ says "good enough for now"

XXX Pullup to -9 and -8


To generate a diff of this commit:
cvs rdiff -u -r1.84 -r1.84.10.1 src/sys/kern/kern_ksyms.c

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