Date: Fri, 12 Nov 2004 17:56:28 -0500 From: "Adam Kropelin" <akropel1@rochester.rr.com> To: "Julian Elischer" <julian@elischer.org> Cc: usb@freebsd.org Subject: Re: anyone seen this problem.. Message-ID: <049301c4c90a$d8109d80$03c8a8c0@kroptech.com> References: <41953285.8070405@elischer.org> <4195340C.6030201@elischer.org>
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Julian Elischer wrote: > Julian Elischer wrote: > >> >> I'm working in 4.10++ plus a few MFC patches.. >> >> One of our applications regularly crashes when using a uhid device. > > > ^^^^^ ugen I've been able to panic the kernel fairly easily using ugen (this is on 5.2.1 and 5.3). The trigger seems to be a length mismatch where the device returns a different amount of data than was expected for a particular transfer. I'm suspecting memory corruption since it will often fail the ioctl a few times before actually panicing. I am not sufficiently clued to obtain a kernel backtrace like you did. I presume I need to configure something to dump me into a kernel debugger upon panic instead of the automatic reboot I'm currently getting. I'll read up on such things and see if I can determine how closely my situation matches yours. --Adam
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