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vt: ignore sequences that contain ':' in parameters. 

csi sequences can contain subparameters delimited by ':' characters. For
now just ignore the whole sequence in this case. Such sequences are used by
more capable terminal implementations with T.416 high color modes or
extended underline rendition attributes.

Also ignore sequences with private use characters '?', '>', '='
and '>' that are not at the initial position.

Signed-off-by: Martin Hostettler <textshell@uchuujin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martin Hostettler 2018-12-15 15:34:23 +01:00 committed by Greg Kroah-Hartman
parent 7a99565f87
commit 04afcd3aaf
1 changed files with 4 additions and 4 deletions
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8
drivers/tty/vt/vt.c
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@ -1629,9 +1629,9 @@ static void rgb_background(struct vc_data *vc, const struct rgb *c)
/* /*
* ITU T.416 Higher colour modes. They break the usual properties of SGR codes * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
* and thus need to be detected and ignored by hand. Strictly speaking, that * and thus need to be detected and ignored by hand. That standard also
* standard also wants : rather than ; as separators, contrary to ECMA-48, but * wants : rather than ; as separators but sequences containing : are currently
* no one produces such codes and almost no one accepts them. * completely ignored by the parser.
* *
* Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
* supporting them. * supporting them.
@ -2261,7 +2261,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_par[vc->vc_npar] += c - '0'; vc->vc_par[vc->vc_npar] += c - '0';
return; return;
} }
if (c >= 0x20 && c <= 0x2f) { if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */
vc->vc_state = EScsiignore; vc->vc_state = EScsiignore;
return; return;
} }