Module Name: src
Committed By: mrg
Date: Thu Aug 10 20:36:29 UTC 2023
Modified Files:
src/external/bsd/pdisk/dist: io.c
src/usr.bin/find: misc.c
src/usr.bin/mail: extern.h fio.c thread.c thread.h
src/usr.bin/rs: rs.c
src/usr.bin/sort: files.c
Log Message:
avoid various use-after-free issues.
create a ptrdiff_t offset between the start of an allocation region and
some interesting pointer, so it can be adjusted with this offset after
realloc() returns. for pdisk(), realloc() is a locally inlind malloc()
and free() pair.
for mail(1), this required a little bit more effort as the old pointer
was passed into another file for fix-ups there, and that code needed to
be adjusted for offset vs old pointer usage.
found by GCC 12.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/external/bsd/pdisk/dist/io.c
cvs rdiff -u -r1.15 -r1.16 src/usr.bin/find/misc.c
cvs rdiff -u -r1.35 -r1.36 src/usr.bin/mail/extern.h
cvs rdiff -u -r1.43 -r1.44 src/usr.bin/mail/fio.c
cvs rdiff -u -r1.14 -r1.15 src/usr.bin/mail/thread.c
cvs rdiff -u -r1.2 -r1.3 src/usr.bin/mail/thread.h
cvs rdiff -u -r1.16 -r1.17 src/usr.bin/rs/rs.c
cvs rdiff -u -r1.42 -r1.43 src/usr.bin/sort/files.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
