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Tue, 2 Jun 2020 11:52:13 +0000 (GMT) From: Bartlomiej Zolnierkiewicz Subject: [PATCH v2 2/2] video: fbdev: amifb: add FIXMEs about {put,get}_user() failures To: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, linux-m68k , Al Viro , Geert Uytterhoeven Message-ID: <380c0494-ed02-b2be-65b0-d385627fb894@samsung.com> Date: Tue, 2 Jun 2020 13:52:13 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKKsWRmVeSWpSXmKPExsWy7djP87p5ttfiDL7s5ba48vU9m8WzW3uZ LE70fWC1uLxrDpvF8idrmS3O/z3O6sDmcehwB6PH/e7jTB4nW7+xeHzeJOex6clbpgDWKC6b lNSczLLUIn27BK6MM8cPMhUs4qyY/vsEawPjNvYuRk4OCQETiQ/nJrGB2EICKxglvr0p7WLk ArK/MErsuNbGBOF8ZpRYsGwWXMe0llY2iMRyRokDT7YzQzhvGSVmv1kFVsUmYCUxsX0VI4gt LBApMfFiA9gOEQEHiSk3JoDVMAssYJTYcsgZxOYVsJN4/WAfM4jNIqAicfjpEzBbVCBC4tOD w6wQNYISJ2c+YQGxOQU8JXb0XmaCmCMucevJfChbXmL72zlgB0kIrGOXOHnzFdAyDiDHReLq IimID4QlXh3fAvWNjMT/nfOZoOoZJf52vIBq3s4osXzyPzaIKmuJO+d+sYEMYhbQlFi/Sx8i 7Chx5sJLJoj5fBI33gpC3MAnMWnbdGaIMK9ER5sQRLWaxIZlG9hg1nbtXMk8gVFpFpLPZiH5 ZhaSb2Yh7F3AyLKKUTy1tDg3PbXYMC+1XK84Mbe4NC9dLzk/dxMjMPGc/nf80w7Gr5eSDjEK cDAq8fAaGF6LE2JNLCuuzD3EKMHBrCTC63T2dJwQb0piZVVqUX58UWlOavEhRmkOFiVxXuNF L2OFBNITS1KzU1MLUotgskwcnFINjOZbnVs5tvH0Wtg0MMnebKmUXvpTQDREqn1pI9c/SaPe 2/Lzi4N1jiUaHZzxvJXvYG/dS1bDq5W2O/MmdWwOiVvzuK9kR60bsylrQP73uRpyLCJZrEqG V/g23Xl8o9a45t9nRx3PHVNZjPqcZyQJ837c5vSnOvlywqQ7D0XZ96mfWXz+laKrEktxRqKh FnNRcSIAnQ8NdjgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJIsWRmVeSWpSXmKPExsVy+t/xu7q5ttfiDHbcM7O48vU9m8WzW3uZ LE70fWC1uLxrDpvF8idrmS3O/z3O6sDmcehwB6PH/e7jTB4nW7+xeHzeJOex6clbpgDWKD2b ovzSklSFjPziElulaEMLIz1DSws9IxNLPUNj81grI1MlfTublNSczLLUIn27BL2MM8cPMhUs 4qyY/vsEawPjNvYuRk4OCQETiWktrWxdjFwcQgJLGSXuNc8CcjiAEjISx9eXQdQIS/y51gVV 85pR4t3v/YwgCTYBK4mJ7avAbGGBSIlXR6+xgNgiAg4SU25MYAdpYBZYwChxtu0gK0T3HEaJ Ha9ugHXwCthJvH6wjxnEZhFQkTj89AmYLSoQIXF4xyyoGkGJkzOfgE3lFPCU2NF7mQnEZhZQ l/gz7xIzhC0ucevJfKi4vMT2t3OYJzAKzULSPgtJyywkLbOQtCxgZFnFKJJaWpybnltsqFec mFtcmpeul5yfu4kRGG3bjv3cvIPx0sbgQ4wCHIxKPLwGhtfihFgTy4orcw8xSnAwK4nwOp09 HSfEm5JYWZValB9fVJqTWnyI0RTouYnMUqLJ+cBEkFcSb2hqaG5haWhubG5sZqEkztshcDBG SCA9sSQ1OzW1ILUIpo+Jg1OqgXHShuc1174L9Kw/2l2n2/OiSHFO45F1GVwCSU9z3u1f7Vf2 +bXp8wOqGxsP6OasTFmn9zP8zLnld14ev33p4qQ+nnnvLEKuV8w7z+q4KOz9olOPP1l9li/l vv/Y9NeaL9t23ohae+2YyB/7UwJzX7Wd9hB55VQaL7cm+vgZvVv8T3/d2epx+ceHcCWW4oxE Qy3mouJEANp7p+rMAgAA X-CMS-MailID: 20200602115213eucas1p2a9a2ebb2afccca0354cf196caf762c81 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20200504232908eucas1p296927bc7c736ad924cefaea9a546459d X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200504232908eucas1p296927bc7c736ad924cefaea9a546459d References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since we lack the hardware (or proper emulator setup) for testing needed changes add FIXMEs to document the issues (so at least they are not forgotten). Cc: Al Viro Cc: Geert Uytterhoeven Signed-off-by: Bartlomiej Zolnierkiewicz --- v2: - rebased on top of updated patch #1/2 drivers/video/fbdev/amifb.c | 2 ++ 1 file changed, 2 insertions(+) Index: b/drivers/video/fbdev/amifb.c =================================================================== --- a/drivers/video/fbdev/amifb.c +++ b/drivers/video/fbdev/amifb.c @@ -1892,6 +1892,7 @@ static int ami_get_var_cursorinfo(struct | ((datawords >> 15) & 1)); datawords <<= 1; #endif + /* FIXME: check the return value + test the change */ put_user(color, data++); } if (bits > 0) { @@ -1962,6 +1963,7 @@ static int ami_set_var_cursorinfo(struct bits = 16; words = delta; datawords = 0; for (width = (short)var->width - 1; width >= 0; width--) { unsigned long tdata = 0; + /* FIXME: check the return value + test the change */ get_user(tdata, data); data++; #ifdef __mc68000__