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TextConsole: saturate escape parameter in TTY_STATE_CSI 

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
(cherry picked from commit c10600af60)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Laszlo Ersek 2012-09-17 11:10:03 +02:00 committed by Michael Roth
parent 5730401442
commit a2aad5fdc4
1 changed files with 5 additions and 2 deletions
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7
console.c
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@ -937,8 +937,11 @@ static void console_putchar(TextConsole *s, int ch)
case TTY_STATE_CSI: /* handle escape sequence parameters */ case TTY_STATE_CSI: /* handle escape sequence parameters */
if (ch >= '0' && ch <= '9') { if (ch >= '0' && ch <= '9') {
if (s->nb_esc_params < MAX_ESC_PARAMS) { if (s->nb_esc_params < MAX_ESC_PARAMS) {
s->esc_params[s->nb_esc_params] = int *param = &s->esc_params[s->nb_esc_params];
s->esc_params[s->nb_esc_params] * 10 + ch - '0'; int digit = (ch - '0');
*param = (*param <= (INT_MAX - digit) / 10) ?
*param * 10 + digit : INT_MAX;
} }
} else { } else {
if (s->nb_esc_params < MAX_ESC_PARAMS) if (s->nb_esc_params < MAX_ESC_PARAMS)