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SubjectRe: [RFC] c/r: prctl: Add ability to set new mm_struct::exe_file v3
On Thu, Mar 08, 2012 at 12:24:38PM -0800, Andy Lutomirski wrote:
>
> nnp is no_new_privs, which is my patch and is almost, but not quite,
> very relevant to this discussion. Hence my confusion ;)
>
> FWIW, since I've touched this code recently, the cleanup you're
> suggesting sounds good.
>

Andy, Kees, I guess the patch below might be a helper we need,
while I'm not sure on naming. hm?

Cyrill
---
include/linux/fs.h | 6 ++++++
1 file changed, 6 insertions(+)
Index: linux-2.6.git/include/linux/fs.h
===================================================================
--- linux-2.6.git.orig/include/linux/fs.h
+++ linux-2.6.git/include/linux/fs.h
@@ -2669,5 +2669,11 @@ static inline void inode_has_no_xattr(st
inode->i_flags |= S_NOSEC;
}

+static inline bool file_may_exec(struct file *f)
+{
+ return S_ISREG(f->f_path.dentry->d_inode->i_mode) &&
+ !(f->f_path.mnt->mnt_flags & MNT_NOEXEC);
+}
+
#endif /* __KERNEL__ */
#endif /* _LINUX_FS_H */

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