From patchwork Mon Jan 22 11:03:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Slaby X-Patchwork-Id: 765919 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 2FD4840BFE; Mon, 22 Jan 2024 11:04:56 +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=1705921497; cv=none; b=QOckveEoG2K0wuzgSB4FbYalTvxys8sr7qKdjNFSoOipn9Oll5h8SsNOr4YqfjDSXHLU5zbAjFzaqzIxcCQXqC10dhG5F81/Al8oAcqQCoY38kT38kacJr+Sk5HA159Vqa2GSmmXuxMdRw9nQ5to9RcR5aOz1XNp9HzWW3JqMss= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705921497; c=relaxed/simple; bh=DAOYyLo1oRnD4iTPfOiMEY1vdjbEkdytO8nE0RBybMQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i9SQuROg1Ikj5wSapqYnw9bNKMElybJ2Yw+HiJaAAu/+Drtpa8DaE0Cy6BCQce9xVHRRMXi/cMMfWRpZ27yId5+bytTnqKTvYVQjupk592+dWZ33s3vJS8KZeXTOmBTm50JL00Soqwl7JsSHdknCnKFJuNvFlncMWY+5STvgpgk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XziewYsx; 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="XziewYsx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 847A9C433C7; Mon, 22 Jan 2024 11:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705921496; bh=DAOYyLo1oRnD4iTPfOiMEY1vdjbEkdytO8nE0RBybMQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XziewYsxLLlD/hclxqdGpQyzU2GoZaBhkVJilxHVkKwxonK+sZh6dEAtI5MTEfLS6 vKJ+mrX4C4Fggy3aisQd/L1XN9j7HC2xUKdE8qDofM1zr0PMXg1c6e3Zf5yduWzw21 PJr7LctUU352ia16qtex2WUWJsQffWiPUcCGGaE36gv+Rqfmc7HtBT2gyZa/cojTxe k9Y1rybMlEPWL7LI/IVTEquwEJ/JbT9rqeIsukDTUfAPVRfruAOu6d0WHfEwlh1BI1 kfbZEA8KeAKg04aBgHZ1FGNTOwHbYUsZy6KT0dRjGuiN+cVVSK3RzqJrSnAy/meCSi hcvCnkxIuRjgw== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" Subject: [PATCH v2 26/47] tty: vt: sanitize consw::con_putcs() parameters Date: Mon, 22 Jan 2024 12:03:40 +0100 Message-ID: <20240122110401.7289-27-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122110401.7289-1-jirislaby@kernel.org> References: <20240122110401.7289-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Similar to con_putc() in the previous patch: * make the pointer to charattr a pointer to u16, and * make x, y, and count unsigned as they are strictly non-negative. And again, document that hook. Signed-off-by: Jiri Slaby (SUSE) --- drivers/video/console/dummycon.c | 10 +++++----- drivers/video/console/mdacon.c | 4 ++-- drivers/video/console/newport_con.c | 9 +++++---- drivers/video/console/sticon.c | 4 ++-- drivers/video/console/vgacon.c | 4 ++-- drivers/video/fbdev/core/fbcon.c | 4 ++-- include/linux/console.h | 6 ++++-- 7 files changed, 22 insertions(+), 19 deletions(-) diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c index 1874beed0325..188d9f3e201c 100644 --- a/drivers/video/console/dummycon.c +++ b/drivers/video/console/dummycon.c @@ -59,10 +59,10 @@ static void dummycon_putc(struct vc_data *vc, u16 c, unsigned int y, raw_notifier_call_chain(&dummycon_output_nh, 0, NULL); } -static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) +static void dummycon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, + unsigned int ypos, unsigned int xpos) { - int i; + unsigned int i; if (!dummycon_putc_called) { /* Ignore erases */ @@ -87,8 +87,8 @@ static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) #else static void dummycon_putc(struct vc_data *vc, u16 c, unsigned int y, unsigned int x) { } -static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) { } +static void dummycon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, + unsigned int ypos, unsigned int xpos) { } static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) { return 0; diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c index 01e779943c00..b8822b615b2f 100644 --- a/drivers/video/console/mdacon.c +++ b/drivers/video/console/mdacon.c @@ -427,8 +427,8 @@ static inline u16 *mda_addr(unsigned int x, unsigned int y) return mda_vram_base + y * mda_num_columns + x; } -static void mdacon_putcs(struct vc_data *c, const unsigned short *s, - int count, int y, int x) +static void mdacon_putcs(struct vc_data *c, const u16 *s, unsigned int count, + unsigned int y, unsigned int x) { u16 *dest = mda_addr(x, y); diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c index 9b5c0118873e..5e65ee0b7c07 100644 --- a/drivers/video/console/newport_con.c +++ b/drivers/video/console/newport_con.c @@ -396,12 +396,13 @@ static void newport_putc(struct vc_data *vc, u16 charattr, unsigned int ypos, RENDER(npregs, p); } -static void newport_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) +static void newport_putcs(struct vc_data *vc, const u16 *s, + unsigned int count, unsigned int ypos, + unsigned int xpos) { - int i; - int charattr; unsigned char *p; + unsigned int i; + u16 charattr; charattr = (scr_readw(s) >> 8) & 0xff; diff --git a/drivers/video/console/sticon.c b/drivers/video/console/sticon.c index 2f87b5909d0d..906da1fde7c8 100644 --- a/drivers/video/console/sticon.c +++ b/drivers/video/console/sticon.c @@ -71,8 +71,8 @@ static const char *sticon_startup(void) return "STI console"; } -static void sticon_putcs(struct vc_data *conp, const unsigned short *s, - int count, int ypos, int xpos) +static void sticon_putcs(struct vc_data *conp, const u16 *s, unsigned int count, + unsigned int ypos, unsigned int xpos) { if (vga_is_gfx || console_blanked) return; diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 4beab11f87eb..aa0589085847 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -1193,8 +1193,8 @@ static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b, static void vgacon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, unsigned int width) { } -static void vgacon_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) { } +static void vgacon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, + unsigned int ypos, unsigned int xpos) { } const struct consw vga_con = { .owner = THIS_MODULE, diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 38de0f8723aa..7a7b2ac0d7a9 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -1279,8 +1279,8 @@ static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, __fbcon_clear(vc, sy, sx, 1, width); } -static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos) +static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, + unsigned int ypos, unsigned int xpos) { struct fb_info *info = fbcon_info_from_console(vc->vc_num); struct fbcon_display *p = &fb_display[vc->vc_num]; diff --git a/include/linux/console.h b/include/linux/console.h index 92d57e5b3009..82d55764a66f 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -41,6 +41,7 @@ enum vc_intensity; * @con_clear: erase @count characters at [@x, @y] on @vc. @count >= 1. * @con_putc: emit one character with attributes @ca to [@x, @y] on @vc. * (optional -- @con_putcs would be called instead) + * @con_putcs: emit @count characters with attributes @s to [@x, @y] on @vc. * @con_scroll: move lines from @top to @bottom in direction @dir by @lines. * Return true if no generic handling should be done. * Invoked by csi_M and printing to the console. @@ -57,8 +58,9 @@ struct consw { unsigned int x, unsigned int count); void (*con_putc)(struct vc_data *vc, u16 ca, unsigned int y, unsigned int x); - void (*con_putcs)(struct vc_data *vc, const unsigned short *s, - int count, int ypos, int xpos); + void (*con_putcs)(struct vc_data *vc, const u16 *s, + unsigned int count, unsigned int ypos, + unsigned int xpos); void (*con_cursor)(struct vc_data *vc, int mode); bool (*con_scroll)(struct vc_data *vc, unsigned int top, unsigned int bottom, enum con_scroll dir,