From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793827179; b=KYvM2l3uN0/0zA72JrWNngukVMY2Ebi8E94SnPbTYjOFKz+u2V9p6+GZ7+zU0vmnV9UJ rbhjm1buPSP0nN/SutuLn5T84EAlL4kVwjvcYnHlSvjIgpVVEwYCv4j318L13tvxJKEgO HioQKedN/p7q5gBGdcB/WjKROwWCijR35WCQ56hgc6ZOJXFHIBHLILMWbu3NaDlXIiOcC G4h8PnrilHC2yOMMCrVGVwJjHuJG3Zjg5iTtArv/4oaXvfb7EqkbUKJNl8Oisy5r+8+VE ODymk4k52UkN23YQwJzsJ6d/VPMXwb45XjzTI0lLlD9syo5Weto7vHi3UqLlecto8Kw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793827179; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=IgpIb25Kf3xQ5fCC4an+44AO5Um1+kvzNpbOYL9Sp5w=; b=ZUhSjQjf7EvkZwoiO1C3aNBETWKh2eFJT6fmZi4kG0eMlzmUInm6k8hg2fsgeqFZy7km q5MTzjG91smwGMKOkFMDXJ6iUpqXxIXnDjsSB4KrjwevoW/QsBKB9WA5bvccCDQLTclxB 87wkWuOu8i0140aVsYNKOYD0V5fif6KNLKBPkI5HU3dXvlbNoTWEFBtKJ+bLjwRlbP8ya k6m8pUe+E+E16RJWjAqUXJV9MijLJtMLpxsMRv/TF53ZioKavXyZO8sxcF6XtZiCfPXOl ehkDLuJGg8kpiFJwi/qrX66r8MKGXgpqHnUEyxXJx0Pmbwkaf5prtyoWtq1I4rk4rYg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=YEddZR0T; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DD60F606EEB7; Wed, 4 Nov 2026 21:19:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=YEddZR0T Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DA051F00919; Wed, 4 Nov 2026 21:19:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793827178; bh=IgpIb25Kf3xQ5fCC4an+44AO5Um1+kvzNpbOYL9Sp5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YEddZR0TSuRZU4Lfco+8DG5roI7cIUE5sUVyXqvQZDoploBcKLX4aQdcnR/wrjb5Y papKeVcw0tSv1zuNanzkM8fwuwfZJa8wp6u9IXdplpDWCidThQJ4tuTjKt8BHKIRx8 +7JZiV6fsZhfzyZMB8/wKECoeDp50eYdeSDgnQvc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Harshit Mogalapalli , Miquel Raynal Subject: [PATCH 7.3 241/547] mtd: virt-concat: unlink concat node before freeing it Date: Wed, 4 Nov 2026 16:07:05 -0500 Message-ID: <20261104211045.016622540@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211038.406938024@linuxfoundation.org> References: <20261104211038.406938024@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Harshit Mogalapalli commit 532caaa2f445b22b74b88b4023a810426772db54 upstream. mtd_virt_concat_create_item() links each new mtd_virt_concat_node to concat_node_list. mtd_virt_concat_destroy() later frees the node after destroying its concatenated MTD device, but fails to unlink it. A later list traversal dereferences the freed node, causing a use-after-free. Remove the node from concat_node_list before freeing it. Fixes: 43db6366fc2d ("mtd: Add driver for concatenating devices") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5.6, smatch Signed-off-by: Harshit Mogalapalli Signed-off-by: Miquel Raynal Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/mtd_virt_concat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mtd/mtd_virt_concat.c b/drivers/mtd/mtd_virt_concat.c index da4277ced4d6..4fad0967a96e 100644 --- a/drivers/mtd/mtd_virt_concat.c +++ b/drivers/mtd/mtd_virt_concat.c @@ -130,6 +130,7 @@ int mtd_virt_concat_destroy(struct mtd_info *mtd) mtd_concat_destroy(&concat->mtd); } + list_del(&item->head); for (idx = 0; idx < item->count; idx++) of_node_put(item->nodes[idx]); -- 2.56.0