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sed: fix double-free in FEATURE_CLEAN_UP code

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-09-25 12:50:54 +02:00
parent 76832ff5c4
commit 706a9a03bb
1 changed files with 17 additions and 12 deletions
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29
editors/sed.c
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@ -180,18 +180,23 @@ static void sed_free_and_close_stuff(void)
if (sed_cmd->sw_file)
fclose(sed_cmd->sw_file);
if (sed_cmd->beg_match) {
regfree(sed_cmd->beg_match);
free(sed_cmd->beg_match);
}
if (sed_cmd->end_match) {
regfree(sed_cmd->end_match);
free(sed_cmd->end_match);
}
if (sed_cmd->sub_match) {
regfree(sed_cmd->sub_match);
free(sed_cmd->sub_match);
}
/* Used to free regexps, but now there is code
* in get_address() which can reuse a regexp
* for constructs as /regexp/cmd1;//cmd2
* leading to double-frees here:
*/
//if (sed_cmd->beg_match) {
// regfree(sed_cmd->beg_match);
// free(sed_cmd->beg_match);
//}
//if (sed_cmd->end_match) {
// regfree(sed_cmd->end_match);
// free(sed_cmd->end_match);
//}
//if (sed_cmd->sub_match) {
// regfree(sed_cmd->sub_match);
// free(sed_cmd->sub_match);
//}
free(sed_cmd->string);
free(sed_cmd);
sed_cmd = sed_cmd_next;