From nobody Mon Feb 9 06:28:25 2026 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 17A5C17BB18; Sun, 24 Mar 2024 23:42:33 +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=1711323754; cv=none; b=gC0mbQVPWEJ6XImW2+hVBftxkVDSlkOj62uY+nZOL2MEQGGtGoteEDVUUD5COd9CvSFkcu36/HLMsM2fadEzKle7o0hNbhsK/N+gvXWUTmvX8yxlZ1Am5fHbwrn4jXYIn5/LvM42q7KQz3GiHYHpfbG2rYjSxYPe5B1OWVX/LUY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323754; c=relaxed/simple; bh=dfcRdPeTUVayWJRGEkGDb9i9+Ny8gRfj+JhkWtSCsHk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LUiCfcACHV9Fsxrj2FTaAZcW5a/Bf0IQXIOBCzLFsqEufhJB/xxVbmGzHrSZlhv/4vxQlQp3k3GYcTC3SX9Z/4i4vPscsDWAaIZrUPkmAXGzShrkpI6ZpQFJ/6kcztjwUmCkZ37RnDGtBSSBjoJxmjNcPwjy3XJbbdwF4UsJp+0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CurqQ5Pd; 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="CurqQ5Pd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89C32C43394; Sun, 24 Mar 2024 23:42:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711323753; bh=dfcRdPeTUVayWJRGEkGDb9i9+Ny8gRfj+JhkWtSCsHk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CurqQ5PdV6Y8vVDCoXVTmsBQCOztTtJ29Nqw4ptDo+CGda6wzBpePDBy5P9sHAy8q GiuvuysI3aIbQ9/oFCXF78eFaqtd9iDScnnhKwhbphPFFfV+a0peMs8K0Mot2w60Na c+H1dh63361JEr9Qgw46BSJnUtTIJS2c6wtcfzDDXFEb4esSDxL8vBPyNihRuqfNp2 yO7gmxXsRktmrYIz/sJ3TgQsawhfa+u/kimyxvQedujChDzyAEfxHF4CcgNgoS72z0 xMaRxf+8R5JIodVoWvhXp8DCRvi+/fcfHKWBuGHj2+irMhbrm+K6kCwnwN5hW0p7Dl IDhQMDFjfPbXQ== 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 5.10 128/238] drm/amd/display: Fix a potential buffer overflow in 'dp_dsc_clock_en_read()' Date: Sun, 24 Mar 2024 19:38:36 -0400 Message-ID: <20240324234027.1354210-129-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324234027.1354210-1-sashal@kernel.org> References: <20240324234027.1354210-1-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 e43f82bcb231a..32dbd2a270887 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 @@ -1179,7 +1179,7 @@ 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