Messages in this thread | | | From | Michael Buesch <> | Subject | Re: NULL pointer dereference in sysfs_readdir | Date | Sat, 21 Oct 2006 23:25:18 +0200 |
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On Saturday 21 October 2006 23:09, Stefan Richter wrote: > Michael Buesch wrote: > > On Saturday 21 October 2006 10:43, Stefan Richter wrote: > ... > >> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=188140 > ... > > Looking through the code I was not able to locate the exact line > > at which it oopses, with the above oops message. > > Are you able to track down the exact pointer dereference, which causes > > this? By inserting printks, perhaps. > > I need the original reporter to do this since I cannot reproduce the > bug. Probably because I don't have an SMP machine yet. > > > Maybe FC changed some of the structures. I couldn't find > > a used structure with an interresting member at offset 00000020, at least. > > Could be struct sysfs_dirent.s_dentry if I'm counting correctly in > http://www.linux-m32r.org/lxr/http/source/include/linux/sysfs.h?v=2.6.16#L68 > The trace was from 2.6.16.
Yeah, I found that offset, too, but:
There is only one usage of s_dentry if (next->s_dentry)
But _before_ that there already comes if (!next->s_element)
So, if "next" was NULL, it would already oops there.
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