From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-4.0 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_NONE shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 97CE31F461 for ; Wed, 10 Jul 2019 18:37:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728361AbfGJSh1 (ORCPT ); Wed, 10 Jul 2019 14:37:27 -0400 Received: from mail-lf1-f67.google.com ([209.85.167.67]:45359 "EHLO mail-lf1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728349AbfGJSh1 (ORCPT ); Wed, 10 Jul 2019 14:37:27 -0400 Received: by mail-lf1-f67.google.com with SMTP id u10so2272531lfm.12 for ; Wed, 10 Jul 2019 11:37:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=he+bfYTaMvabn/fKges5vgvhBZ9/CKEokVhHZxfYeP8=; b=cq1hgCTMZ/+XvMUH+ts7c6XJiqxi2cE++TX9JU3N7JwDV9ZzUzh9SoCuA38vLdhJUZ EjIJVAhAsae0bQqDQ+lD20sgg1pUxHE0DKvNcx56eUs9GUFDDC8vGQOo4MW0UJdTIKZJ 7ygH/IGFzvSomM3m17Kysr2XiBhscxaEA4SsvsL58cD1UHfOO7tauMbTSrmuBGGAu41V o0+hlywv4Xm60fpsagZU19WVg6FITJmpB6c6yVCTD6mNJ9bsTaKQhqx3zHiMVJD7NhHz x6epu4wLPc5tyPP29l/EtmbaiNrtxNTgCdGQsWw6mNEx8A0OnFGEUNiCJisdR/tJIjG6 T0gQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=he+bfYTaMvabn/fKges5vgvhBZ9/CKEokVhHZxfYeP8=; b=Eotq5po4Iuvnrlf7hj76kFCcqCb77+WI4VZMWGm6zirPvE3dF8OixwEKRm9ifSWVWV 4IxP9hFXocTX7Hsi0t/Zx2KYCuJAikdfuKfJIzvLD+wEbac21YNrMpuDqmD3jfI9gMxY R06hVb4CKivAapuBJtls6FdTxR9hUQ/Rc2Ty2eyeVpAqYe58JGhA8N1z2gkRHOg/AZoU hSmuTfXwoHMD/7Wdhja/Y2kwmJc0JkTdPqZtJc/J/bnayD1UYnzBSe2W2NIL5JWwryry vukJP3sV8j7TjZTS3ke22fVMJg0Ws/QOX4SSNokF3jTyH/oixlN2EXcWoTiPJ/+/XPIg 8SxA== X-Gm-Message-State: APjAAAUHJomrAeccki9V5Gy8GKo5Eu/ccWaOD9wgg0Y1R+kNK/yP7JIW TooQsp2MkoDCjOjDnjNmvO+1if9B X-Google-Smtp-Source: APXvYqxzxZvi8szdvMpmBM7Wt1wX9fb8QmU7XqfQvMm/e4LLNzhIjlVMAEuB/VcO5416fDKigR3L2w== X-Received: by 2002:ac2:4ac4:: with SMTP id m4mr541789lfp.172.1562783844841; Wed, 10 Jul 2019 11:37:24 -0700 (PDT) Received: from localhost.localdomain (31-211-229-121.customers.ownit.se. [31.211.229.121]) by smtp.gmail.com with ESMTPSA id h1sm456959lfj.21.2019.07.10.11.37.23 for (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Wed, 10 Jul 2019 11:37:24 -0700 (PDT) From: =?UTF-8?q?Martin=20=C3=85gren?= To: git@vger.kernel.org Subject: [PATCH] ref-filter: fix memory leak in `free_array_item()` Date: Wed, 10 Jul 2019 20:36:39 +0200 Message-Id: <20190710183639.4123992-1-martin.agren@gmail.com> X-Mailer: git-send-email 2.22.0.428.g6d5b264208 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org We treat the `value` pointer as a pointer to a struct and free its `s` field. But `value` is in fact an array of structs. As a result, we only free the first `s` out of `used_atom_cnt`-many and leak the rest. Make sure we free all items in `value`. In the caller, `ref_array_clear()`, this means we need to be careful not to zero `used_atom_cnt` until after we've called `free_array_item()`. We could move just a single line, but let's keep related things close together instead, by first handling `array`, then `used_atom`. Signed-off-by: Martin Ă…gren --- ref-filter.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/ref-filter.c b/ref-filter.c index 791f0648a6..1c1a2af880 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -2105,7 +2105,9 @@ static void free_array_item(struct ref_array_item *item) { free((char *)item->symref); if (item->value) { - free((char *)item->value->s); + int i; + for (i = 0; i < used_atom_cnt; i++) + free((char *)item->value[i].s); free(item->value); } free(item); @@ -2116,14 +2118,16 @@ void ref_array_clear(struct ref_array *array) { int i; - for (i = 0; i < used_atom_cnt; i++) - free((char *)used_atom[i].name); - FREE_AND_NULL(used_atom); - used_atom_cnt = 0; for (i = 0; i < array->nr; i++) free_array_item(array->items[i]); FREE_AND_NULL(array->items); array->nr = array->alloc = 0; + + for (i = 0; i < used_atom_cnt; i++) + free((char *)used_atom[i].name); + FREE_AND_NULL(used_atom); + used_atom_cnt = 0; + if (ref_to_worktree_map.worktrees) { hashmap_free(&(ref_to_worktree_map.map), 1); free_worktrees(ref_to_worktree_map.worktrees); -- 2.22.0.428.g6d5b264208