From nobody Wed Oct 15 22:45:57 2025 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 4063C279888; Sun, 24 Mar 2024 23:37:53 +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=1711323475; cv=none; b=U4//GtsamgHA1mEgoUO5Vc/m/HCm7Upl1ZVchjfJBlGKK5VT2oVOUXlMiGeqXhwCXzKC1gT006wqx+zM9s95C72GHa2tQdiu8AJv7LvefMjvjK7pb3p4BhMZ3SPVcOyvmw4CXj6YXCGHP+WRz3ZJ013/dEa/O1GOEyXlhEm3NC4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323475; c=relaxed/simple; bh=gOm8QUKYEAL5SWFQcl/aDpAeWskFHl4skoIU8sTcPuQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mM7O6tooQIXszIuGOA2n8zcOIs4X6EuNmgvO1yTPE09k9H8YdNuVS2bcPEFm3S9zOpUFT7FWEVXMadOSpgKD5w6iKRRVy5ggZipQHezd0lUGwYTytfo5ezaeBJRP90fg/qIOr1f5Q02Mx/ZETJtNeSQqZF7OBJACEHNvQbog2CI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Wwzdg64J; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Wwzdg64J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5A06C433F1; Sun, 24 Mar 2024 23:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711323473; bh=gOm8QUKYEAL5SWFQcl/aDpAeWskFHl4skoIU8sTcPuQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wwzdg64J+nz9Q1wBrBZSRXDkYzCWMZhLcbW0VmLIynRCZTaSCX8SHJoJZ12l94WdC cyarzKOGwG8GM/W+lYOqgwZ7BqroR1u0f01E6aEeb5UG7dzhGvlzquJkG0xvxunEHB hZqnhvb3y5qwsvfF8flsslWBunL++1HXSL3//GJ6PW+ruNlra1EYO/2Aa/gUiqWhhB slae4MwxwlYjktil4/uDV/P56DJcGk2Ipkfwa67XHnGfGNCgAKwgBCeb40X5b4r1Gz G6eZElQs2lCIoZpPtU1PYzMmqYyXHgtT8XBoaz9PW2p05zgccr5XR+JRD2jmfaVOTF VgNBAQlxbm0hQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivasan Shanmugam , Alex Hung , Qingqing Zhuo , Rodrigo Siqueira , Aurabindo Pillai , Alex Deucher , Harry Wentland , Sasha Levin Subject: [PATCH 5.15 178/317] drm/amd/display: Fix a potential buffer overflow in 'dp_dsc_clock_en_read()' Date: Sun, 24 Mar 2024 19:32:38 -0400 Message-ID: <20240324233458.1352854-179-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org> References: <20240324233458.1352854-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Srinivasan Shanmugam [ Upstream commit 4b09715f1504f1b6e8dff0e9643630610bc05141 ] Tell snprintf() to store at most 10 bytes in the output buffer instead of 30. Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:1508 dp= _dsc_clock_en_read() error: snprintf() is printing too much 30 vs 10 Fixes: c06e09b76639 ("drm/amd/display: Add DSC parameters logging to debugf= s") Cc: Alex Hung Cc: Qingqing Zhuo Cc: Rodrigo Siqueira Cc: Aurabindo Pillai Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/dr= ivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index 6d694cea24201..ed2f6802b0e20 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -1304,7 +1304,7 @@ static ssize_t dp_dsc_clock_en_read(struct file *f, c= har __user *buf, const uint32_t rd_buf_size =3D 10; struct pipe_ctx *pipe_ctx; ssize_t result =3D 0; - int i, r, str_len =3D 30; + int i, r, str_len =3D 10; =20 rd_buf =3D kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); =20 --=20 2.43.0