From: Andreas Gruenbacher <agruen@kernel.org>
Date: Fri, 27 May 2011 12:50:36 +0000 (+0200)
Subject: xattr: Fix error results for non-existent / invisible attributes
X-Git-Tag: v3.0-rc1~21^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55b23bde19c08f14127a27d461a4e079942c7258;p=pandora-kernel.git

xattr: Fix error results for non-existent / invisible attributes

Return -ENODATA when trying to read a user.* attribute which cannot
exist: user space otherwise does not have a reasonable way to
distinguish between non-existent and inaccessible attributes.

Likewise, return -ENODATA when an unprivileged process tries to read a
trusted.* attribute: to unprivileged processes, those attributes are
invisible (listxattr() won't include them).

Related to this bug report: https://bugzilla.redhat.com/660613

Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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