--- /dev/null
+diff -up patch-2.7.6/src/pch.c.CVE-2018-1000156 patch-2.7.6/src/pch.c
+--- patch-2.7.6/src/pch.c.CVE-2018-1000156 2018-02-03 12:41:49.000000000 +0000
++++ patch-2.7.6/src/pch.c 2018-05-03 12:50:43.374036905 +0100
+@@ -33,6 +33,7 @@
+ # include <io.h>
+ #endif
+ #include <safe.h>
++#include <sys/wait.h>
+
+ #define INITHUNKMAX 125 /* initial dynamic allocation size */
+
+@@ -2388,22 +2389,28 @@ do_ed_script (char const *inname, char c
+ static char const editor_program[] = EDITOR_PROGRAM;
+
+ file_offset beginning_of_this_line;
+- FILE *pipefp = 0;
+ size_t chars_read;
++ FILE *tmpfp = 0;
++ char const *tmpname;
++ int tmpfd = -1;
++ pid_t pid;
++
++ if (! dry_run && ! skip_rest_of_patch)
++ {
++ /* Write ed script to a temporary file. This causes ed to abort on
++ invalid commands such as when line numbers or ranges exceed the
++ number of available lines. When ed reads from a pipe, it rejects
++ invalid commands and treats the next line as a new command, which
++ can lead to arbitrary command execution. */
++
++ tmpfd = make_tempfile (&tmpname, 'e', NULL, O_RDWR | O_BINARY, 0);
++ if (tmpfd == -1)
++ pfatal ("Can't create temporary file %s", quotearg (tmpname));
++ tmpfp = fdopen (tmpfd, "w+b");
++ if (! tmpfp)
++ pfatal ("Can't open stream for file %s", quotearg (tmpname));
++ }
+
+- if (! dry_run && ! skip_rest_of_patch) {
+- int exclusive = *outname_needs_removal ? 0 : O_EXCL;
+- assert (! inerrno);
+- *outname_needs_removal = true;
+- copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
+- sprintf (buf, "%s %s%s", editor_program,
+- verbosity == VERBOSE ? "" : "- ",
+- outname);
+- fflush (stdout);
+- pipefp = popen(buf, binary_transput ? "wb" : "w");
+- if (!pipefp)
+- pfatal ("Can't open pipe to %s", quotearg (buf));
+- }
+ for (;;) {
+ char ed_command_letter;
+ beginning_of_this_line = file_tell (pfp);
+@@ -2414,14 +2421,14 @@ do_ed_script (char const *inname, char c
+ }
+ ed_command_letter = get_ed_command_letter (buf);
+ if (ed_command_letter) {
+- if (pipefp)
+- if (! fwrite (buf, sizeof *buf, chars_read, pipefp))
++ if (tmpfp)
++ if (! fwrite (buf, sizeof *buf, chars_read, tmpfp))
+ write_fatal ();
+ if (ed_command_letter != 'd' && ed_command_letter != 's') {
+ p_pass_comments_through = true;
+ while ((chars_read = get_line ()) != 0) {
+- if (pipefp)
+- if (! fwrite (buf, sizeof *buf, chars_read, pipefp))
++ if (tmpfp)
++ if (! fwrite (buf, sizeof *buf, chars_read, tmpfp))
+ write_fatal ();
+ if (chars_read == 2 && strEQ (buf, ".\n"))
+ break;
+@@ -2434,13 +2441,50 @@ do_ed_script (char const *inname, char c
+ break;
+ }
+ }
+- if (!pipefp)
++ if (!tmpfp)
+ return;
+- if (fwrite ("w\nq\n", sizeof (char), (size_t) 4, pipefp) == 0
+- || fflush (pipefp) != 0)
++ if (fwrite ("w\nq\n", sizeof (char), (size_t) 4, tmpfp) == 0
++ || fflush (tmpfp) != 0)
+ write_fatal ();
+- if (pclose (pipefp) != 0)
+- fatal ("%s FAILED", editor_program);
++
++ if (lseek (tmpfd, 0, SEEK_SET) == -1)
++ pfatal ("Can't rewind to the beginning of file %s", quotearg (tmpname));
++
++ if (! dry_run && ! skip_rest_of_patch) {
++ int exclusive = *outname_needs_removal ? 0 : O_EXCL;
++ *outname_needs_removal = true;
++ if (inerrno != ENOENT)
++ {
++ *outname_needs_removal = true;
++ copy_file (inname, outname, 0, exclusive, instat.st_mode, true);
++ }
++ sprintf (buf, "%s %s%s", editor_program,
++ verbosity == VERBOSE ? "" : "- ",
++ outname);
++ fflush (stdout);
++
++ pid = fork();
++ if (pid == -1)
++ pfatal ("Can't fork");
++ else if (pid == 0)
++ {
++ dup2 (tmpfd, 0);
++ execl ("/bin/sh", "sh", "-c", buf, (char *) 0);
++ _exit (2);
++ }
++ else
++ {
++ int wstatus;
++ if (waitpid (pid, &wstatus, 0) == -1
++ || ! WIFEXITED (wstatus)
++ || WEXITSTATUS (wstatus) != 0)
++ fatal ("%s FAILED", editor_program);
++ }
++ }
++
++ fclose (tmpfp);
++ unlink (tmpname);
++ free((char*) tmpname);
+
+ if (ofp)
+ {
+diff -up patch-2.7.6/tests/ed-style.CVE-2018-1000156 patch-2.7.6/tests/ed-style
+--- patch-2.7.6/tests/ed-style.CVE-2018-1000156 2018-05-03 12:50:28.988937938 +0100
++++ patch-2.7.6/tests/ed-style 2018-05-03 12:51:35.841397873 +0100
+@@ -0,0 +1,40 @@
++# Copyright (C) 2018 Free Software Foundation, Inc.
++#
++# Copying and distribution of this file, with or without modification,
++# in any medium, are permitted without royalty provided the copyright
++# notice and this notice are preserved.
++
++. $srcdir/test-lib.sh
++
++require_cat
++use_local_patch
++use_tmpdir
++
++# ==============================================================
++
++cat > ed1.diff <<EOF
++0a
++foo
++.
++EOF
++
++check 'patch -e foo -i ed1.diff' <<EOF
++EOF
++
++check 'cat foo' <<EOF
++foo
++EOF
++
++cat > ed2.diff <<EOF
++1337a
++r !echo bar
++,p
++EOF
++
++check 'patch -e foo -i ed2.diff > /dev/null 2> /dev/null || echo "Status: $?"' <<EOF
++Status: 2
++EOF
++
++check 'cat foo' <<EOF
++foo
++EOF
+diff -up patch-2.7.6/tests/Makefile.am.CVE-2018-1000156 patch-2.7.6/tests/Makefile.am
+--- patch-2.7.6/tests/Makefile.am.CVE-2018-1000156 2018-05-03 12:50:28.988937938 +0100
++++ patch-2.7.6/tests/Makefile.am 2018-05-03 12:50:57.340132989 +0100
+@@ -32,6 +32,7 @@ TESTS = \
+ crlf-handling \
+ dash-o-append \
+ deep-directories \
++ ed-style \
+ empty-files \
+ false-match \
+ fifo \
+diff -up patch-2.7.6/tests/Makefile.in.CVE-2018-1000156 patch-2.7.6/tests/Makefile.in
+--- patch-2.7.6/tests/Makefile.in.CVE-2018-1000156 2018-05-03 12:50:28.989937944 +0100
++++ patch-2.7.6/tests/Makefile.in 2018-05-03 12:51:25.974329992 +0100
+@@ -1308,6 +1308,7 @@ TESTS = \
+ crlf-handling \
+ dash-o-append \
+ deep-directories \
++ ed-style \
+ empty-files \
+ false-match \
+ fifo \
+@@ -1645,6 +1646,13 @@ empty-files.log: empty-files
+ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+ --log-file $$b.log --trs-file $$b.trs \
+ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
++ "$$tst" $(AM_TESTS_FD_REDIRECT)
++ed-style.log: empty-files
++ @p='ed-style'; \
++ b='ed-style'; \
++ $(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
++ --log-file $$b.log --trs-file $$b.trs \
++ $(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+ "$$tst" $(AM_TESTS_FD_REDIRECT)
+ false-match.log: false-match
+ @p='false-match'; \
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