CVS commit: src/lib/libutil

["Kamil Rytarowski" <kamil%netbsd.org@localhost>]

Module Name:    src
Committed By:   kamil
Date:           Sun Jun 24 01:53:14 UTC 2018

Modified Files:
        src/lib/libutil: passwd.c

Log Message:
Prevent underflow buffer read in trim_whitespace() in libutil/passwd.c

If a string is empty or contains only white characters, the algorithm of
removal of white characters at the end of the passed string will read
buffer at index -1 and keep iterating backward.

Detected with MKSANITIZER/ASan when executing passwd(1).


To generate a diff of this commit:
cvs rdiff -u -r1.52 -r1.53 src/lib/libutil/passwd.c

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