From: Serge Hallyn <serue@us.ibm.com>
Date: Thu, 30 Oct 2008 16:52:23 +0000 (-0500)
Subject: file caps: always start with clear bprm->caps_*
X-Git-Tag: v2.6.27.5~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcc5bc3d9f306cbb5e2f55d65bce1c8372b25fde;p=pandora-kernel.git

file caps: always start with clear bprm->caps_*

commit 3318a386e4ca68c76e0294363d29bdc46fcad670 upstream

While Linux doesn't honor setuid on scripts.  However, it mistakenly
behaves differently for file capabilities.

This patch fixes that behavior by making sure that get_file_caps()
begins with empty bprm->caps_*.  That way when a script is loaded,
its bprm->caps_* may be filled when binfmt_misc calls prepare_binprm(),
but they will be cleared again when binfmt_elf calls prepare_binprm()
next to read the interpreter's file capabilities.

Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Andrew G. Morgan <morgan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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