flex_arrays: allow zero length flex arrays
authorEric Paris <eparis@redhat.com>
Thu, 28 Apr 2011 19:55:52 +0000 (15:55 -0400)
committerEric Paris <eparis@redhat.com>
Thu, 28 Apr 2011 20:12:54 +0000 (16:12 -0400)
commitbf69d41d198138e3c601e9a6645f4f1369aff7e0
tree6cd3c35430f616732caa0096bd7791b56c8bd3ab
parent5d30b10bd68df007e7ae21e77d1e0ce184b53040
flex_arrays: allow zero length flex arrays

Just like kmalloc will allow one to allocate a 0 length segment of memory
flex arrays should do the same thing.  It should bomb if you try to use
something, but it should at least allow the allocation.

This is needed because when SELinux switched to using flex_arrays in 2.6.38
the inability to allocate a 0 length array resulted in SELinux policy load
returning -ENOSPC when previously it worked.

Based-on-patch-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Tested-by: Chris Richards <gizmo@giz-works.com>
Cc: stable@kernel.org [2.6.38+]
lib/flex_array.c