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SubjectRe: NFS PANIC and FIX in 2.4
On Saturday June 9, wrote:
> Hi All,
> I get this panic running RedHat 2.4.3-6:
> Unable to handle kernel NULL pointer dereference at virtual address 00000004
> c014b13d

> The problem is pretty specific to 2.4.3-6 because it has code in list_del() to
> null out the prev and next pointers (I don't know where they picked it up, but
> its gone in 2.4.5). However, it exposes a bug in NFS, namely that d_splice()
> also calls list_del() on tdentry->d_child. This shouldn't be done because it
> makes the d_child list invalid, so any subsequent call to list_del on d_child
> could panic. I think the correct fix (attached below) is to change the NFS
> list_del to list_del_init.

Yep, that looks good. I'll forward it to Linus with a few other fixes
I have pending.


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