linux-kernel - Fwd: fs/exec.c core dumping on NFS mounted directory

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Date:	Fri, 25 Jun 2010 12:32:43 -0700
From:	Lei Sun <leisun124@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Fwd: fs/exec.c core dumping on NFS mounted directory

  In 2.6.3x, I am logging in as a root and running app from NFS
mounted directory. The app crashed with 0 bytes core file (I have set
"ulimit -c unlimited", so it's not an issue).

Proposed patch:

--- exec.c 2010-05-19 17:33:16.000000000 -0700
+++ exec.c.new 2010-05-19 17:33:07.000000000 -0700
@@ -1859,7 +1859,7 @@
     * Dont allow local users get cute and trick others to coredump
     * into their pre-created files:
     */
- if (inode->i_uid != current_fsuid())
+ if (inode->i_bytes != 0 && inode->i_uid != current_fsuid())
        goto close_fail;

    if (!file->f_op)


P.S. CC to my email, i am not on the list.

Thanks
lei
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