Date: Wed, 20 Jun 2007 11:11:25 +0400 (MSD) From: "R.Mahmatkhanov" <cvs-src@yandex.ru> To: freebsd-usb@freebsd.org Subject: Fw: Re: Panic on post-freeze current with ucom Message-ID: <4678D31D.000001.03344@webmail11.yandex.ru>
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--- Forwarded message -- From: R.Mahmatkhanov <cvs-src@yandex.ru> To: <hselasky@c2i.net> Date: 20.06.07 11:09 Subject: Re: Panic on post-freeze current with ucom >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. Yes, but i forgot to mention that it working like a charm in RELENG_6. In fact i believe that this problem is appeared rigth after recent usb-subsystem cleansing. > >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. Thanks, i will try. > >--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> >> --- End of forwarded message --
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