patch: reproducibility: Fix host umask leakage

Some patch files create entirely new files, so their permissions are subject to
the host umask. If such a file is later installed into a package with no change
in permissions, it breaks the reproducibility of the package.

This was observed on libpam, for instance: The patch file
pam-security-abstract-securetty-handling.patch creates a new file
(tty_secure.c). This file is later copied into the -dbg package with no change
in permissions.

(From OE-Core rev: 2a2bbd755b330cd63f7f6e2f2b374a3ae065b37a)

(From OE-Core rev: 9841962b5bfdaaeed31f79573f6fbd9d1d56dd17)

Signed-off-by: Douglas Royds <douglas.royds@taitradio.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/classes/patch.bbclass b/meta/classes/patch.bbclass
index 3e0a181821..cd241f1c84 100644
--- a/meta/classes/patch.bbclass
+++ b/meta/classes/patch.bbclass
@@ -153,6 +153,7 @@ python patch_do_patch() {
 patch_do_patch[vardepsexclude] = "PATCHRESOLVE"
 
 addtask patch after do_unpack
+do_patch[umask] = "022"
 do_patch[dirs] = "${WORKDIR}"
 do_patch[depends] = "${PATCHDEPENDENCY}"