CVS commit: src/usr.bin/indent

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Sun May 21 10:05:20 UTC 2023

Modified Files:
        src/usr.bin/indent: indent.c

Log Message:
indent: don't read out-of-bounds memory in preprocessing lines

(Since a few minutes.)

If a line '#if 0' was followed by an unlikely line '#', the second line
was interpreted as '#if' as well.

To detect this bug automatically, a dynamic analysis tool would need to
know that only the memory between lab.mem and lab.mem + lab.len has
defined content.  This constraint, in turn, would throw up at the bottom
of copy_comment_wrap, which for a brief moment intentionally violates
this constraint.


To generate a diff of this commit:
cvs rdiff -u -r1.301 -r1.302 src/usr.bin/indent/indent.c

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