From: Pavel Emelyanov <xemul@openvz.org>
Date: Wed, 20 Aug 2008 21:09:10 +0000 (-0700)
Subject: binfmt_misc: fix false -ENOEXEC when coupled with other binary handlers
X-Git-Tag: v2.6.27-rc4~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff9bc512f198eb47204f55b24c6fe3d36ed89592;p=pandora-kernel.git

binfmt_misc: fix false -ENOEXEC when coupled with other binary handlers

In case the binfmt_misc binary handler is registered *before* the e.g.
script one (when for example being compiled as a module) the following
situation may occur:

1. user launches a script, whose interpreter is a misc binary;
2. the load_misc_binary sets the misc_bang and returns -ENOEVEC,
   since the binary is a script;
3. the load_script_binary loads one and calls for search_binary_hander
   to run the interpreter;
4. the load_misc_binary is called again, but refuses to load the
   binary due to misc_bang bit set.

The fix is to move the misc_bang setting lower - prior to the actual
call to the search_binary_handler.

Caused by the commit 3a2e7f47 (binfmt_misc.c: avoid potential kernel
stack overflow)

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reported-by: Kirill A. Shutemov <kirill@shutemov.name>
Tested-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: <stable@kernel.org>		[2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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