From: Davidlohr Bueso <dave@stgolabs.net>
Date: Tue, 30 Jun 2015 21:58:48 +0000 (-0700)
Subject: ipc,sysv: return -EINVAL upon incorrect id/seqnum
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~53^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6157dbbfbf9d8e4a2b6d4e5ee35e864ab9ee8414;p=pandora-kernel.git

ipc,sysv: return -EINVAL upon incorrect id/seqnum

In ipc_obtain_object_check we return -EIDRM when a bogus sequence number
is detected via ipc_checkid, while the ipc manpages state the following
return codes for such errors:

   EIDRM  <ID> points to a removed identifier.
   EINVAL Invalid <ID> value, or unaligned, etc.

EIDRM should only be returned upon a RMID call (->deleted check), and thus
return EINVAL for wrong seq.  This difference in semantics has also caused
real bugs, ie: https://bugzilla.redhat.com/show_bug.cgi?id=246509

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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