This is a note to let you know that I've just added the patch titled
libnvdimm, pfn: fix uuid validation
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libnvdimm-pfn-fix-uuid-validation.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e5670563f588ed1c0603819350c0f02cec23f5c5 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Thu, 7 Apr 2016 19:59:27 -0700
Subject: libnvdimm, pfn: fix uuid validation
From: Dan Williams <dan.j.williams@xxxxxxxxx>
commit e5670563f588ed1c0603819350c0f02cec23f5c5 upstream.
If we detect a namespace has a stale info block in the init path, we
should overwrite with the latest configuration. In fact, we already
return -ENODEV when the parent uuid is invalid, the same should be done
for the 'self' uuid. Otherwise we can get into a condition where
userspace is unable to reconfigure the pfn-device without directly /
manually invalidating the info block.
Reported-by: Jeff Moyer <jmoyer@xxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nvdimm/pfn_devs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -275,7 +275,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pf
} else {
/* from init we validate */
if (memcmp(nd_pfn->uuid, pfn_sb->uuid, 16) != 0)
- return -EINVAL;
+ return -ENODEV;
}
/*
Patches currently in stable-queue which might be from dan.j.williams@xxxxxxxxx are
queue-4.4/libnvdimm-pfn-fix-uuid-validation.patch
queue-4.4/libnvdimm-fix-smart-data-retrieval.patch
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