CVS commit: src/usr.bin/make

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

Module Name:    src
Committed By:   rillig
Date:           Sat Aug 29 08:59:08 UTC 2020

Modified Files:
        src/usr.bin/make: main.c

Log Message:
make(1): fix null pointer dereference when sys.mk is not found

This is quite hard to trigger in a real-life scenario since it requires
precise timing.

Instead, I created /tmp/sys.mk and ran "./make -m /tmp -f /dev/null" in
the debugger, after setting a breakpoint in this line:

ln = Lst_Find(sysMkPath, ReadMakefile, NULL);

Once this line was reached, I removed /tmp/sys.mk to make ReadMakefile
fail.  Just adding a few parse errors won't help since ReadMakefile only
fails if the file cannot be found.


To generate a diff of this commit:
cvs rdiff -u -r1.323 -r1.324 src/usr.bin/make/main.c

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