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s390/con3270: Use scnprintf() instead of sprintf()

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Use scnprintf() instead of sprintf() for those cases where the destination
is an array and the size of the array is known at compile time.

This prevents theoretical buffer overflows, but also avoids that people
again and again spend time to figure out if the code is actually safe.

Reviewed-by: Jan Polensky <japo@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens
2025-10-07 11:05:05 +02:00
parent c769941de8
commit c97689345c
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/char/con3270.c
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@@ -1662,7 +1662,7 @@ static void tty3270_escape_sequence(struct tty3270 *tp, u8 ch)
else if (tp->esc_par[0] == 6) { /* Cursor report. */
char buf[40];
sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
scnprintf(buf, sizeof(buf), "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
kbd_puts_queue(&tp->port, buf);
}
return;