From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3A45830C36F; Mon, 13 Oct 2025 15:05:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760367950; cv=none; b=NUuGTa3zizTnXs4GNYMems4zLblARsLmT3Bi12ewopjF95ymNubB5A/QR63abZ17z0zCvIlu6jY3s8S0RFeeqmerC2nQLs7fz9ciaeM1ltcR0JDsuH8x7ROEto3NAfZ9A/nM789yT6RvnwMYGvH8Wyo185PsyOj7CwExbVTCk1U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760367950; c=relaxed/simple; bh=8s0fcy/6+U5VhB/vZ0N7gAbJsYg4cJKfcfBglFt4dSY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VtZsQ5G0PEbTigBLqTAA37lZoAOoqS2xCkUaXm02sD6DvJRSLLiMwkGHQ4DjKhf6CywJEBDwB3kytqmsTTR2/6lOKmWES/CfQ+wDA+EDv0vJfniJ5ySdmbglzPySRNIU3jvdYrp9J6ig6yfX/f9kPQL71FncxKMqfKnb84sHp7Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VmArcWpv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VmArcWpv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8686C4CEE7; Mon, 13 Oct 2025 15:05:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760367950; bh=8s0fcy/6+U5VhB/vZ0N7gAbJsYg4cJKfcfBglFt4dSY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VmArcWpvl4ONDswze7GgM1EGqHLnmqJsDIy8JI4wFR//5U1cb3Qx5XhT3elq3LJCg 5/U1/gj+gjaOgOtihzyTWUAozzZJti5O+wL5xQruIjo25fBvlQ1l9I4B1+Fudehuc3 bMxzbPs31GqwnMIVrqi46yfNknf5UJuJlA3DbWto= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhen Ni , Mathieu Poirier Subject: [PATCH 6.6 190/196] remoteproc: pru: Fix potential NULL pointer dereference in pru_rproc_set_ctable() Date: Mon, 13 Oct 2025 16:46:21 +0200 Message-ID: <20251013144322.179557255@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144315.184275491@linuxfoundation.org> References: <20251013144315.184275491@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhen Ni commit d41e075b077142bb9ae5df40b9ddf9fd7821a811 upstream. pru_rproc_set_ctable() accessed rproc->priv before the IS_ERR_OR_NULL check, which could lead to a null pointer dereference. Move the pru assignment, ensuring we never dereference a NULL rproc pointer. Fixes: 102853400321 ("remoteproc: pru: Add pru_rproc_set_ctable() function") Cc: stable@vger.kernel.org Signed-off-by: Zhen Ni Link: https://lore.kernel.org/r/20250923112109.1165126-1-zhen.ni@easystack.cn Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- drivers/remoteproc/pru_rproc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/remoteproc/pru_rproc.c +++ b/drivers/remoteproc/pru_rproc.c @@ -340,7 +340,7 @@ EXPORT_SYMBOL_GPL(pru_rproc_put); */ int pru_rproc_set_ctable(struct rproc *rproc, enum pru_ctable_idx c, u32 addr) { - struct pru_rproc *pru = rproc->priv; + struct pru_rproc *pru; unsigned int reg; u32 mask, set; u16 idx; @@ -352,6 +352,7 @@ int pru_rproc_set_ctable(struct rproc *r if (!rproc->dev.parent || !is_pru_rproc(rproc->dev.parent)) return -ENODEV; + pru = rproc->priv; /* pointer is 16 bit and index is 8-bit so mask out the rest */ idx_mask = (c >= PRU_C28) ? 0xFFFF : 0xFF;