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SubjectRe: Fwd: fs/exec.c core dumping on NFS mounted directory
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On Fri, 2010-06-25 at 12:32 -0700, Lei Sun wrote:
> 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)
>
... which would go ahead and reintroduce bugzilla entry 3043, but only
for those filesystems that set inode->i_bytes to zero:
https://bugzilla.kernel.org/show_bug.cgi?id=3043

NACKed...

Trond



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