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Commit ef34dd18 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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staging/fwserial: add diagnostic for buffer overflow 



Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2257d122

drivers/staging/fwserial/fwserial.c

+4 −1
Original line number Diff line number Diff line
@@ -577,8 +577,11 @@ static int fwtty_buffer_rx(struct fwtty_port *port, unsigned char *d, size_t n) 
	struct buffered_rx *buf;

	size_t size = (n + sizeof(struct buffered_rx) + 0xFF) & ~0xFF;



	if (port->buffered + n > HIGH_WATERMARK)

	if (port->buffered + n > HIGH_WATERMARK) {

		fwtty_err_ratelimited(port, "overflowed rx buffer: buffered: %d new: %ld wtrmk: %d",

				      port->buffered, n, HIGH_WATERMARK);

		return 0;

	}

	buf = kmalloc(size, GFP_ATOMIC);

	if (!buf)

		return 0;