From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1D957440A13; Mon, 17 Aug 2026 15:11:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786979468; cv=none; b=cAidDxXpxtfnRbdRoogpoOj3FVwyE8h/OonPTe5g2pHLmLCfVg+T+ReHXa8twLH6lCRivi3qYJSBvfmcOtH9WzUHxKA7ynd/Tljq6cH5mNibHNWVag1i+oAO+Ynfu+kpwf5qUujm8FsU83oX9meRKlnIQlF2aR9ZHra+IHaYv7Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786979468; c=relaxed/simple; bh=QuDbqg6ULuWI9z5J9ryoOp+g4Izfen0qcEPvkaXh92A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WxaAYcxLSNFBCrpdzGBt+O2U2XkrM9oQFNY9dktrt1F0KE7hWu0nyL9Qb+FnLwdGMdwt+FM5blfchZf3kCVV0FX014WdDj2y6XEoq3LstaUvXO2vq9DINNrxkWNrh+MnkjZxfltxBwDNAuiVM5v3+l3dGhG0O22qP52/Kjhw41w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=c/uZSGqG; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="c/uZSGqG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3693A1F000E9; Mon, 17 Aug 2026 15:11:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786979466; bh=kkBBfShp44DZ4O27WU7xjxxi4kiVovCidOZIQt82E3Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=c/uZSGqGoXBks5ACY+ObKPKlgHcY5ToZKpIRLt8TzeHuU1zPDN124sLuSsGiod/YW faToQ/5TM85NJE/rG0ChNKFzFL1aa1yzU8RH6nacxN3jqdNJonenZZ5aaql+4oaL7k FIs3yV7vJEOUQH6lNVSAXogIocUhAGcrpgO1ZZIE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anand Moon , Nicolas Dufresne , Hans Verkuil Subject: [PATCH 6.1 197/609] media: meson: vdec: Fix memory leak in error path of vdec_open Date: Mon, 17 Aug 2026 15:28:13 +0200 Message-ID: <20260817132550.691809309@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132543.039278408@linuxfoundation.org> References: <20260817132543.039278408@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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anand Moon commit 940f161f734b25f175a95d2684c2021f6323693a upstream. The vdec_open() function previously jumped directly to err_m2m_release when vdec_init_ctrls() failed, skipping release of the m2m context. This caused a resource leak. Fix it by introducing a proper err_m2m_ctx_release label that calls v4l2_m2m_ctx_release(sess->m2m_ctx) before releasing the m2m device. This was identified via kmemleak: unreferenced object 0xffff0000205d6878 (size 8): comm "v4l_id", pid 5289, jiffies 4294938580 hex dump (first 8 bytes): 40 d2 49 18 00 00 ff ff @.I..... backtrace (crc d3204599): kmemleak_alloc+0xc8/0xf0 __kvmalloc_node_noprof+0x60c/0x850 v4l2_ctrl_handler_init_class+0x1b4/0x2e8 [videodev] vdec_open+0x1f4/0x788 [meson_vdec] v4l2_open+0x144/0x460 [videodev] chrdev_open+0x1ac/0x500 do_dentry_open+0x3f0/0xfe8 vfs_open+0x68/0x320 do_open+0x2d8/0x9a8 path_openat+0x1d0/0x4f0 do_filp_open+0x190/0x380 do_sys_openat2+0xf8/0x1b0 __arm64_sys_openat+0x13c/0x1e8 invoke_syscall+0xdc/0x268 el0_svc_common.constprop.0+0x178/0x258 do_el0_svc+0x4c/0x70 Fixes: 3e7f51bd9607 ("media: meson: add v4l2 m2m video decoder driver") Cc: stable@vger.kernel.org Signed-off-by: Anand Moon Signed-off-by: Nicolas Dufresne Signed-off-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman --- drivers/staging/media/meson/vdec/vdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/staging/media/meson/vdec/vdec.c +++ b/drivers/staging/media/meson/vdec/vdec.c @@ -897,7 +897,7 @@ static int vdec_open(struct file *file) ret = vdec_init_ctrls(sess); if (ret) - goto err_m2m_release; + goto err_m2m_ctx_release; sess->pixfmt_cap = formats[0].pixfmts_cap[0]; sess->fmt_out = &formats[0]; @@ -922,6 +922,8 @@ static int vdec_open(struct file *file) return 0; +err_m2m_ctx_release: + v4l2_m2m_ctx_release(sess->m2m_ctx); err_m2m_release: v4l2_m2m_release(sess->m2m_dev); err_free_sess: