Date: Wed, 20 Jun 2007 08:57:24 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Cc: "R.Mahmatkhanov" <cvs-src@yandex.ru> Subject: Re: Panic on post-freeze current with ucom Message-ID: <200706200857.25030.hselasky@c2i.net> In-Reply-To: <46790374.8040903@yandex.ru> References: <46790374.8040903@yandex.ru>
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On Wednesday 20 June 2007 12:37, R.Mahmatkhanov wrote: > Good Day. > Hi, The parsing of the USB descriptors in general is not very fault tolerant in the old USB stack. Probably there is a missing range or NULL check somewhere. Unfortunately my new USB stack does not yet compile on the latest 7-current. Else you should try that, and if that fixes the problem, the people still maintaining the old USB stack should backport the parsing routines for the USB descriptors. --HPS > I just move to latest -current/i386 after the code freeze. And i catch > 100% reproduceble panic condition. It happens when i plug my mobile > phone to USB port. How it does: > > ucom0: <CURITEL Incorporated CURITEL HX-550C USB Modem, class 2/0, rev > 1.10/0.00, addr 2> on uhub1 > Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 > fault virtual address = 0x4 > fault code = supervisor read, page not present > instruction pointer = 0x20: 0xc06ca396 > stack pointer = 0x28: 0xdd30a760 > frame pointer = 0x28: 0xdd30a760 > code segment = base 0x0, limit 0xfffff, type = 0x1b, DPL 0, pres 1, > = def32 1, gran 1 > processor eflags = interrupt enabled, resume; IOPL = 0 > current process = 28 (usb1) > [thread pid 28 tid 100023] > Stopped at usb_get_interface_descruptor+0x6: movl 0x4(%eax), %eax > db> >
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