Re: kern/48954: USB diagconstic message: actlen (-15996) > len (4)

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

The following reply was made to PR kern/48954; it has been noted by GNATS.

From: Alexander Nasonov <alnsn%yandex.ru@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost, alnsn%NetBSD.org@localhost
Subject: Re: kern/48954: USB diagconstic message: actlen (-15996) > len (4)
Date: Sun, 6 Jul 2014 10:09:34 +0100

 Nick Hudson wrote:
 >  Does disabling IPv6 on your machine help?
 
 It makes no difference.
 
 After spending a bit more time looking at the bug, I found out that
 dmesg doesn't report stacktrace correctly. The kernel crashed in the
 usbd_setup_xfer at the instruction that corresponds to the first line
 of the function:
 
         xfer->pipe = pipe;
 
 Also, I got three more crashes from ehci_softintr. Two crashes were at
 memcpy+0x14 and the third was at
 
 crash> x/i 0xffffffff802a0582
 ehci_idone+0xa9:        movslq  58 (%r14),%rsi
 
 The new kernel doesn't have DIAGNOSTIC so I don't know whether the
 crashes in memcpy were preceeded by any diagnostic messages.
 
 Alex