Mercurial > vim
view src/link.sh @ 33879:d418c82f02a4 v9.0.2149
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Commit: https://github.com/vim/vim/commit/5dd41d4b6370b7b7d09d691f9252b3899c66102a
Author: Christian Brabandt <cb@256bit.org>
Date: Mon Dec 4 22:52:23 2023 +0100
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Problem: [security]: use-after-free in exec_instructions()
Solution: get tv pointer again
[security]: use-after-free in exec_instructions()
exec_instructions may access freed memory, if the GA_GROWS_FAILS()
re-allocates memory. When this happens, the typval tv may still point to
now already freed memory. So let's get that pointer again and compare it
with tv. If those two pointers differ, tv is now invalid and we have to
refresh the tv pointer.
closes: #13621
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 10 Dec 2023 15:16:17 +0100 |
parents | e1e3805fcd96 |
children | 5418b0e3a0c1 |
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#! /bin/sh # # link.sh -- try linking Vim with different sets of libraries, finding the # minimal set for fastest startup. The problem is that configure adds a few # libraries when they exist, but this doesn't mean they are needed for Vim. # # Author: Bram Moolenaar # Last change: 2010 Nov 03 # License: Public domain # # Warning: This fails miserably if the linker doesn't return an error code! # # Otherwise this script is fail-safe, falling back to the original full link # command if anything fails. echo "$LINK " >link_$PROG.cmd exit_value=0 if test "$LINK_AS_NEEDED" = yes; then echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly." cat link_$PROG.cmd if sh link_$PROG.cmd; then exit_value=0 echo "link.sh: Linked fine" else exit_value=$? echo "link.sh: Linking failed" fi else if test -f auto/link.sed; then # # If auto/link.sed already exists, use it. We assume a previous run of # link.sh has found the correct set of libraries. # echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now." echo "link.sh: If linking fails, try deleting the auto/link.sed file." echo "link.sh: If this fails too, try creating an empty auto/link.sed file." else # If linking works with the full link command, try removing some libraries, # that are known not to be needed on at least one system. # Remove auto/pathdef.c if there is a new link command and compile it again. # There is a loop to remove libraries that appear several times. # # Notes: # - Can't remove Xext; It links fine but will give an error when running gvim # with Motif. # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK # GUI is started, because the "floor" symbol could not be resolved. # cat link_$PROG.cmd if sh link_$PROG.cmd; then touch auto/link.sed cp link_$PROG.cmd linkit_$PROG.sh for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w perl dl pthread thread readline m crypt attr; do cont=yes while test -n "$cont"; do if grep "l$libname " linkit_$PROG.sh >/dev/null; then if test ! -f link1_$PROG.sed; then echo "link.sh: OK, linking works, let's try omitting a few libraries." echo "link.sh: See auto/link.log for details." rm -f auto/link.log fi echo "s/-l$libname *//" >link1_$PROG.sed sed -f auto/link.sed <link_$PROG.cmd >linkit2_$PROG.sh sed -f link1_$PROG.sed <linkit2_$PROG.sh >linkit_$PROG.sh # keep the last -lm if test $libname != "m" || grep "lm " linkit_$PROG.sh >/dev/null; then echo "link.sh: Trying to omit the $libname library..." cat linkit_$PROG.sh >>auto/link.log # Redirect this link output, it may contain error messages which # should be ignored. if sh linkit_$PROG.sh >>auto/link.log 2>&1; then echo "link.sh: Vim doesn't need the $libname library!" cat link1_$PROG.sed >>auto/link.sed rm -f auto/pathdef.c else echo "link.sh: Vim DOES need the $libname library." cont= cp link_$PROG.cmd linkit_$PROG.sh fi else cont= cp link_$PROG.cmd linkit_$PROG.sh fi else cont= cp link_$PROG.cmd linkit_$PROG.sh fi done done if test ! -f auto/pathdef.c; then $MAKE objects/pathdef.o fi if test ! -f link1_$PROG.sed; then echo "link.sh: Linked fine, no libraries can be omitted" touch link3_$PROG.sed fi else exit_value=$? fi fi # # Now do the real linking. # if test -s auto/link.sed; then echo "link.sh: Using auto/link.sed file to omit a few libraries" sed -f auto/link.sed <link_$PROG.cmd >linkit_$PROG.sh cat linkit_$PROG.sh if sh linkit_$PROG.sh; then exit_value=0 echo "link.sh: Linked fine with a few libraries omitted" else exit_value=$? echo "link.sh: Linking failed, making auto/link.sed empty and trying again" mv -f auto/link.sed link2_$PROG.sed touch auto/link.sed rm -f auto/pathdef.c $MAKE objects/pathdef.o fi fi if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3_$PROG.sed; then echo "link.sh: Using unmodified link command" cat link_$PROG.cmd if sh link_$PROG.cmd; then exit_value=0 echo "link.sh: Linked OK" else exit_value=$? if test -f link2_$PROG.sed; then echo "link.sh: Linking doesn't work at all, removing auto/link.sed" rm -f auto/link.sed fi fi fi fi # # cleanup # rm -f link_$PROG.cmd linkit_$PROG.sh link1_$PROG.sed link2_$PROG.sed \ link3_$PROG.sed linkit2_$PROG.sh # # return an error code if something went wrong # exit $exit_value # vim:set sw=2 et: