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memory: avoid leaking the speller or linter command string, when invoked

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This fixes https://savannah.gnu.org/bugs/?59854.
Reported-by: Mike Frysinger <vapier@gentoo.org>

Bug existed probably since version 2.9.6, commit 94347f08.
This commit is contained in:
Benno Schulenberg 2021-01-11 19:36:34 +01:00
parent 9bd7d62c10
commit bc36813349
1 changed files with 8 additions and 3 deletions
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11
src/text.c
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@ -2142,13 +2142,17 @@ void treat(char *tempfile_name, char *theprogram, bool spelling)
if (thepid < 0) {
statusline(ALERT, _("Could not fork: %s"), strerror(errornumber));
free(arguments[0]);
return;
} else if (!WIFEXITED(program_status) || WEXITSTATUS(program_status) > 2) {
statusline(ALERT, _("Error invoking '%s'"), arguments[0]);
free(arguments[0]);
return;
} else if (WEXITSTATUS(program_status) != 0)
statusline(ALERT, _("Program '%s' complained"), arguments[0]);
free(arguments[0]);
/* When the temporary file wasn't touched, say so and leave. */
if (timestamp_sec > 0 && stat(tempfile_name, &fileinfo) == 0 &&
(long)fileinfo.st_mtim.tv_sec == timestamp_sec &&
@ -2561,7 +2565,6 @@ void do_linter(void)
int lint_status, lint_fd[2];
pid_t pid_lint;
bool helpless = ISSET(NO_HELP);
static char **lintargs = NULL;
lintstruct *lints = NULL, *tmplint = NULL, *curlint = NULL;
time_t last_wait = 0;
@ -2600,10 +2603,10 @@ void do_linter(void)
currmenu = MLINTER;
statusbar(_("Invoking linter..."));
construct_argument_list(&lintargs, openfile->syntax->linter, openfile->filename);
/* Fork a process to run the linter in. */
if ((pid_lint = fork()) == 0) {
char **lintargs = NULL;
/* Redirect standard output and standard error into the pipe. */
if (dup2(lint_fd[1], STDOUT_FILENO) < 0)
exit(7);
@ -2613,6 +2616,8 @@ void do_linter(void)
close(lint_fd[0]);
close(lint_fd[1]);
construct_argument_list(&lintargs, openfile->syntax->linter, openfile->filename);
/* Start the linter program; we are using $PATH. */
execvp(lintargs[0], lintargs);