Date: Sun, 23 Jan 2011 07:40:09 GMT From: PseudoCylon <moonlightakkiy@yahoo.ca> To: freebsd-net@FreeBSD.org Subject: Re: kern/153938: [run] [panic] [patch] Workaround for use-after-free panic Message-ID: <201101230740.p0N7e98A074643@freefall.freebsd.org>
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The following reply was made to PR kern/153938; it has been noted by GNATS. From: PseudoCylon <moonlightakkiy@yahoo.ca> To: bug-followup@freebsd.org, Juergen Lock <nox@jelal.kn-bremen.de> Cc: Juergen Lock <nox@jelal.kn-bremen.de> Subject: Re: kern/153938: [run] [panic] [patch] Workaround for use-after-free panic Date: Sat, 22 Jan 2011 23:35:14 -0800 (PST) ----- Original Message ---- > From: Juergen Lock <nox@jelal.kn-bremen.de> > To: PseudoCylon <moonlightakkiy@yahoo.ca> > Cc: bug-followup@freebsd.org; Juergen Lock <nox@jelal.kn-bremen.de> > Sent: Fri, January 21, 2011 11:21:20 AM > Subject: Re: kern/153938: [run] [panic] [patch] Workaround for use-after-free >panic > > It's possible this was triggered by the first DPRINTFN() in > run_node_cleanup() (that I turned into a device_printf() and meanwhile > have disabled, maybe it caused a taskswitch) Your bt says no. > #5 0xffffffff8117839b in run_node_cleanup (ni=0xffffff8000f83000) > at >/data2v/home/nox/src-r81/src/sys/modules/usb/run/../../../dev/usb/wlan/if_run.c:1719 > > 1719 RUN_LOCK(sc); > (kgdb) l run_node_cleanup() was called with node lock held. Happens all the time. > - but in any case I'd > say this is not safe i.e. needs to be fixed. :) > Yes. Here is fix. This one shall work. http://gitorious.org/run/run/trees/fifo_fix/dev/usb/wlan AK
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