CVS commit: src/sys/kern

["Paul Goyette" <pgoyette%netbsd.org@localhost>]

Module Name:    src
Committed By:   pgoyette
Date:           Sun Jan  5 21:12:34 UTC 2020

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

Log Message:
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 -r1.87 -r1.88 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.