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authorPete Zaitcev <zaitcev@redhat.com>2006-06-09 20:10:10 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 15:04:17 -0700
commit5b1c674d223eef6c6494be8be91e9e3a3054817e (patch)
tree4f7cbbc36d90ec00cd9f958b62cbfc87f550f34f /drivers/usb/mon/mon_text.c
parent4bc203d997c0dc1eada4cc9681372c2f7a456c46 (diff)
[PATCH] USB: update usbmon, fix glued lines
This update contains one bug fix: some lines can come out truncated, because of the safety cutoff. This happened because I forgot to update the size when status packets began to be printed. The rest is: - Comments updates - Allow snooping with pkmap on x86_64, which is cache-coherent - Enlarge event buffers (certainly we can have a couple of pages) - Add event counter First touch upon usbmon for 2.6.18. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/mon/mon_text.c')
-rw-r--r--drivers/usb/mon/mon_text.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index ac043ec2b8d..9f9236bf62d 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -26,10 +26,13 @@
/*
* This limit exists to prevent OOMs when the user process stops reading.
+ * If usbmon were available to unprivileged processes, it might be open
+ * to a local DoS. But we have to keep to root in order to prevent
+ * password sniffing from HID devices.
*/
-#define EVENT_MAX 25
+#define EVENT_MAX (2*PAGE_SIZE / sizeof(struct mon_event_text))
-#define PRINTF_DFL 130
+#define PRINTF_DFL 160
struct mon_event_text {
struct list_head e_link;
@@ -111,7 +114,7 @@ static inline char mon_text_get_data(struct mon_event_text *ep, struct urb *urb,
* number of corner cases, but it seems that the following is
* more or less safe.
*
- * We do not even try to look transfer_buffer, because it can
+ * We do not even try to look at transfer_buffer, because it can
* contain non-NULL garbage in case the upper level promised to
* set DMA for the HCD.
*/