From ef34dd184d58824f1cde7402afa8ba2a957029d9 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Mon, 28 Jan 2013 22:34:43 -0500 Subject: staging/fwserial: add diagnostic for buffer overflow Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/staging/fwserial/fwserial.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c index 258ac35fb5af..fe9a68854452 100644 --- a/drivers/staging/fwserial/fwserial.c +++ b/drivers/staging/fwserial/fwserial.c @@ -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; -- cgit v1.2.3