+ fs-binfmts-better-handling-of-binfmt-loops-fix.patch added to -mm tree

+ fs-binfmts-better-handling-of-binfmt-loops-fix.patch added to -mm tree

[akpm]

Subject: + fs-binfmts-better-handling-of-binfmt-loops-fix.patch added to -mm tree
To: dan.carpenter@oracle.com,zml@linux.vnet.ibm.com
From: akpm@linux-foundation.org
Date: Thu, 01 Aug 2013 16:41:13 -0700


The patch titled
     Subject: fs/binfmts: double unlock in search_binary_handler()
has been added to the -mm tree.  Its filename is
     fs-binfmts-better-handling-of-binfmt-loops-fix.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/fs-binfmts-better-handling-of-binfmt-loops-fix.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/fs-binfmts-better-handling-of-binfmt-loops-fix.patch

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------------------------------------------------------
From: Dan Carpenter <dan.carpenter@oracle.com>
Subject: fs/binfmts: double unlock in search_binary_handler()

The recent -mm patch 3046d15088 "fs/binfmts: better handling of binfmt
loops" introduced a new "continue" to the loop.  The problem is that we
are supposed to be holding the lock at the start so we need to take it
again.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Zach Levis <zml@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/exec.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN fs/exec.c~fs-binfmts-better-handling-of-binfmt-loops-fix fs/exec.c
--- a/fs/exec.c~fs-binfmts-better-handling-of-binfmt-loops-fix
+++ a/fs/exec.c
@@ -1426,6 +1426,7 @@ int search_binary_handler(struct linux_b
 				copy_strings(bprm->argc_orig, *((struct user_arg_ptr *) bprm->argv_orig), bprm);
 				bprm->argc = bprm->argc_orig;
 				retval = -ENOEXEC;
+				read_lock(&binfmt_lock);
 				continue;
 			}
 
_

Patches currently in -mm which might be from dan.carpenter@oracle.com are

rapidio-fix-use-after-free-in-rio_unregister_scan.patch
ocfs2-use-list_for_each_entry-instead-of-list_for_each.patch
fs-binfmts-better-handling-of-binfmt-loops-fix.patch
pktcdvd-convert-printk-to-pr_level.patch
linux-next.patch
fs-convert-fs-shrinkers-to-new-scan-count-api-fix-fix.patch