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staging/fwserial: add diagnostic for buffer overflow 

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-01-28 22:34:43 -05:00 committed by Greg Kroah-Hartman
parent 2257d1224f
commit ef34dd184d
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/fwserial/fwserial.c
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@ -577,8 +577,11 @@ static int fwtty_buffer_rx(struct fwtty_port *port, unsigned char *d, size_t n)
struct buffered_rx *buf; struct buffered_rx *buf;
size_t size = (n + sizeof(struct buffered_rx) + 0xFF) & ~0xFF; 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; return 0;
}
buf = kmalloc(size, GFP_ATOMIC); buf = kmalloc(size, GFP_ATOMIC);
if (!buf) if (!buf)
return 0; return 0;