From 33d973ad88ceb83ed1449592b7574b5b5bb33ac6 Mon Sep 17 00:00:00 2001 From: Steven Robertson Date: Wed, 21 Jul 2010 16:38:44 -0400 Subject: [PATCH] USB: resizing usbmon binary interface buffer causes protection faults Enlarging the buffer size via the MON_IOCT_RING_SIZE ioctl causes general protection faults. It appears the culprit is an incorrect argument to mon_free_buff: instead of passing the size of the current buffer being freed, the size of the new buffer is passed. Use the correct size argument to mon_free_buff when changing the size of the buffer. Signed-off-by: Steven Robertson Acked-by: Pete Zaitcev Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mon/mon_bin.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 1be0b9f93366..44cb37b5a4dc 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -1004,7 +1004,7 @@ static long mon_bin_ioctl(struct file *file, unsigned int cmd, unsigned long arg mutex_lock(&rp->fetch_lock); spin_lock_irqsave(&rp->b_lock, flags); - mon_free_buff(rp->b_vec, size/CHUNK_SIZE); + mon_free_buff(rp->b_vec, rp->b_size/CHUNK_SIZE); kfree(rp->b_vec); rp->b_vec = vec; rp->b_size = size; -- 2.20.1