The patch titled
drivers/md/dm-mpath.c: fix kernel NULL pointer dereference
has been added to the -mm tree. Its filename is
drivers-md-dm-mpathc-fix-kernel-null-pointer-dereference.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: drivers/md/dm-mpath.c: fix kernel NULL pointer dereference
From: "Patrick J. LoPresti" <lopresti@xxxxxxxxx>
I discovered this when I accidentally put the following in my
/etc/multipath.conf file:
path_selector least_pending
...instead of this:
path_selector "least_pending 0"
To my surprise, this resulted in a NULL pointer dereference in the kernel.
Without this patch, the parse_priority_group function can return 0, which
the caller (multipath_ctr()) immediately dereferences.
Cc: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-mpath.c | 1 +
1 file changed, 1 insertion(+)
diff -puN drivers/md/dm-mpath.c~drivers-md-dm-mpathc-fix-kernel-null-pointer-dereference drivers/md/dm-mpath.c
--- a/drivers/md/dm-mpath.c~drivers-md-dm-mpathc-fix-kernel-null-pointer-dereference
+++ a/drivers/md/dm-mpath.c
@@ -706,6 +706,7 @@ static struct priority_group *parse_prio
if (as->argc < nr_params) {
ti->error = "not enough path parameters";
+ r = -EINVAL;
goto bad;
}
_
Patches currently in -mm which might be from lopresti@xxxxxxxxx are
drivers-md-dm-mpathc-fix-kernel-null-pointer-dereference.patch
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