This is a heads up for the Debian Kernel Team, though you likely are
aware of the problem already.
There is a bug affecting NFS version 4 server (nfsd), and the patch
has now hit Linus' tree:
commit fffaee365fded09f9ebf2db19066065fa54323c3
Author: Konstantin Khlebnikov
Date: Tue Jun 5 21:36:33 2012 +0400
radix-tree: fix contiguous iterator
This patch fixes bug in macro radix_tree_for_each_contig().
If radix_tree_next_slot() sees NULL in next slot it returns NULL, but follow
radix_tree_next_chunk() switches iterating into next chunk. As result iterat
becomes non-contiguous and breaks vfs "splice" and all its users.
Signed-off-by: Konstantin Khlebnikov
Reported-and-bisected-by: Hans de Bruin
Reported-and-bisected-by: Ondrej Zary
Reported-bisected-and-tested-by: Toralf Förster
Link:
https://lkml.org/lkml/2012/6/5/64
Cc: stable # 3.4.x
Signed-off-by: Linus Torvalds
I'm sure this will be included in gregkh's 3.4.2, but I see that Debian kernel
3.4.1-1~experimental.1 has already been uploaded. I don't see any reference to
the above NFS-related patch, so don't be surprised if you get some bug reports!
FYI,
Dave W.
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