From: Ahmad Fatoum <a.fatoum@barebox.org>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@barebox.org>
Subject: [PATCH 03/20] fbconsole: fix handling of CSI buffer overflow
Date: Sun, 3 May 2026 10:33:05 +0200 [thread overview]
Message-ID: <20260503084430.2765761-4-a.fatoum@barebox.org> (raw)
In-Reply-To: <20260503084430.2765761-1-a.fatoum@barebox.org>
To avoid overflowing the CSI buffer, a check for csipos == 255
aborts the CSI parse and reverts to expecting literal characters.
This is fine, but afterwards the if clause terminates with a return
instead of a break which results in priv->in_console never being reset.
Use break, so the relevant code after the switch is not skipped.
Fixes: 27f79c05ab42 ("video: implement framebuffer console")
Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
drivers/video/fbconsole.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbconsole.c b/drivers/video/fbconsole.c
index 2461ab2fb849..547db00208ff 100644
--- a/drivers/video/fbconsole.c
+++ b/drivers/video/fbconsole.c
@@ -672,7 +672,7 @@ static void fbc_putc(struct console_device *cdev, char c)
priv->csipos = 0;
priv->state = LIT;
priv->csi_cmd = -1;
- return;
+ break;
}
switch (c) {
--
2.47.3
next prev parent reply other threads:[~2026-05-03 8:45 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-03 8:33 [PATCH 00/20] fbconsole: support TUI-relevant escape sequences Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 01/20] fbconsole: remove incomplete CSI_CNT state Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 02/20] fbconsole: improve handling of unexpected escape sequences Ahmad Fatoum
2026-05-03 8:33 ` Ahmad Fatoum [this message]
2026-05-03 8:33 ` [PATCH 04/20] fbconsole: do not reset cursor visibility alongside attributes Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 05/20] fbconsole: respect hidden cursor everywhere Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 06/20] fbconsole: call fb_blit_area for every drawchar Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 07/20] fbconsole: skip fb_flush when processing escape sequences Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 08/20] fbconsole: factor out helpers for clamped cursor row/col setting Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 09/20] fbconsole: precompute foreground/background colors Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 10/20] fbconsole: collect renderable state into struct fbc_screen_state Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 11/20] fbconsole: implement CSI A/B/C/D cursor movement sequences Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 12/20] fbconsole: restrict cursor visibility to DEC private mode 25 Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 13/20] fbconsole: add new clear_chars helper Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 14/20] fbconsole: implement erase entire line CSI Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 15/20] fbconsole: support ESC[0J and ESC[1J partial screen clear Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 16/20] fbconsole: implement DEC save/restore cursor Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 17/20] fbconsole: implement VT100 deferred wrap (last column flag) Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 18/20] fbconsole: implement alternate screen buffer (ESC[?1049h/l) Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 19/20] fbconsole: adapt logging depending on activated streams Ahmad Fatoum
2026-05-03 8:33 ` [PATCH 20/20] netconsole: suppress log message when opening console file Ahmad Fatoum
2026-05-07 10:38 ` [PATCH 00/20] fbconsole: support TUI-relevant escape sequences Sascha Hauer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260503084430.2765761-4-a.fatoum@barebox.org \
--to=a.fatoum@barebox.org \
--cc=barebox@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox