tree 19e9c261dde8fb0ee737181a584b26dbeb2e7c7a
parent 3c72acd887e270a062447e20cdb9aac57a6f62b8
author Jann Horn <jann@thejh.net> 1429404519 +0200
committer chrmhoffmann <chrmhoffmann@gmail.com> 1502552333 +0200

fs: take i_mutex during prepare_binprm for set[ug]id executables

This prevents a race between chown() and execve(), where chowning a
setuid-user binary to root would momentarily make the binary setuid
root.

This patch was mostly written by Linus Torvalds.

Signed-off-by: Jann Horn <jann@thejh.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Conflicts:
	fs/exec.c

Change-Id: Iecebf23d07e299689e4ba4fd74ea8821ef96e72b