From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 16 Feb 2026 09:42:25 +0100 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vruBV-002G1a-0F for lore@lore.pengutronix.de; Mon, 16 Feb 2026 09:42:25 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vruBU-0000sE-Ni for lore@pengutronix.de; Mon, 16 Feb 2026 09:42:25 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZpgEj2j2w6wXNvABxVekxTNC84giiTpQcqBqqr4jRew=; b=luteD94E2aA05EjDokBUO8+TUU xKYQCrfMEhczzNpdVDjqvTAOf8hD/r14aNHKWnudb4hpsQHfPPjG+xRF1ebEAKkny5Fi0591Zav2V cAvK0b9PZ5kZ4u8siZZomip/8zvm3W4G419JdVzjMxnp457PjJB7DyNcw39A9BiO+uQvY3PcGC5Hb XdzO+5WMP8WXiPmuygRvEqQY9yvrRuFFfU6spggcalT+TQWoGsQSCzDyRHiUcEWoQ+ewHSD1JDUCx NIp5F+kIbHJvHzYHQ2GsdLcG7wkHJkErXkA1UCuo9HRxpmFPaNGgBvnIBFCjoeGaTTigHLkoStLhm 3+YLDP+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vruB9-00000006AXO-09WH; Mon, 16 Feb 2026 08:42:03 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vruAy-00000006AUf-47Ne for barebox@lists.infradead.org; Mon, 16 Feb 2026 08:42:00 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vruAp-0000ds-FP; Mon, 16 Feb 2026 09:41:43 +0100 Received: from dude05.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::54]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vruAn-0012BX-2x; Mon, 16 Feb 2026 09:41:43 +0100 Received: from [::1] (helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1vruAp-0000000EsaY-0hKO; Mon, 16 Feb 2026 09:41:43 +0100 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum , "Claude Opus 4.6" Date: Mon, 16 Feb 2026 09:41:38 +0100 Message-ID: <20260216084142.3546363-3-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260216084142.3546363-1-a.fatoum@pengutronix.de> References: <20260216084142.3546363-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260216_004157_954638_1F02E830 X-CRM114-Status: GOOD ( 10.33 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE,SUBJECT_IN_BLACKLIST, SUBJECT_IN_BLOCKLIST autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH master 3/4] of: fdt: fix double free in fdt_ensure_space X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) fdt_ensure_space() frees the original buffer on memalign_realloc() failure, but on error, the buffer is already freed by memalign_realloc() unlike realloc(). Fix this by aligning memalign_realloc() behavior with normal realloc() and adapting callers accordingly. Fixes: dd36494ae2 ("of: fdt: fix memory leak in fdt_ensure_space") Reported-by: GCC 14.2 -fanalyzer Co-authored-by: Claude Opus 4.6 Signed-off-by: Ahmad Fatoum --- drivers/of/fdt.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index ea763cf7a52a..658718d4e238 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -421,10 +421,8 @@ static void *memalign_realloc(void *orig, size_t oldsize, size_t newsize) return memalign(align, newsize); newbuf = memalign(align, newsize); - if (!newbuf) { - free(orig); + if (!newbuf) return NULL; - } memcpy(newbuf, orig, oldsize); free(orig); @@ -606,10 +604,13 @@ void *of_flatten_dtb(struct device_node *node) header.size_dt_strings = cpu_to_fdt32(fdt.str_nextofs); if (fdt.dt_size - fdt.dt_nextofs < fdt.str_nextofs) { - fdt.dt = memalign_realloc(fdt.dt, fdt.dt_size, + void *newmem; + + newmem = memalign_realloc(fdt.dt, fdt.dt_size, fdt.dt_nextofs + fdt.str_nextofs); - if (!fdt.dt) + if (!newmem) goto out_free; + fdt.dt = newmem; } memcpy(fdt.dt + fdt.dt_nextofs, fdt.strings, fdt.str_nextofs); -- 2.47.3