tmpfs: clear S_ISGID when setting posix ACLs
This change was missed the tmpfs modification in In CVE-2016-7097
commit 073931017b49 ("posix_acl: Clear SGID bit when setting
file permissions")
It can test by xfstest generic/375, which failed to clear
setgid bit in the following test case on tmpfs:
touch $testfile
chown 100:100 $testfile
chmod 2755 $testfile
_runas -u 100 -g 101 -- setfacl -m u::rwx,g::rwx,o::rwx $testfile
Change-Id: I639fb4221e65b8c1ab3cc26ba735521e25967faa
Signed-off-by: Gu Zheng <guzheng1@huawei.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[gmrt: Backport to 3.4]
CVE-2016-7097
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
1 file changed