From: John Johansen Date: Mon, 16 Jan 2017 08:42:43 +0000 (-0800) Subject: apparmor: provide userspace flag indicating binfmt_elf_mmap change X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=34c426acb75cc21bdf84685e106db0c1a3565057;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git apparmor: provide userspace flag indicating binfmt_elf_mmap change Commit 9f834ec18def ("binfmt_elf: switch to new creds when switching to new mm") changed when the creds are installed by the binfmt_elf handler. This affects which creds are used to mmap the executable into the address space. Which can have an affect on apparmor policy. Add a flag to apparmor at /sys/kernel/security/apparmor/features/domain/fix_binfmt_elf_mmap to make it possible to detect this semantic change so that the userspace tools and the regression test suite can correctly deal with the change. BugLink: http://bugs.launchpad.net/bugs/1630069 Signed-off-by: John Johansen --- diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c index 49a5122e03fe..5c000cb7ef8e 100644 --- a/security/apparmor/apparmorfs.c +++ b/security/apparmor/apparmorfs.c @@ -796,6 +796,7 @@ static struct aa_fs_entry aa_fs_entry_domain[] = { AA_FS_FILE_BOOLEAN("change_hatv", 1), AA_FS_FILE_BOOLEAN("change_onexec", 1), AA_FS_FILE_BOOLEAN("change_profile", 1), + AA_FS_FILE_BOOLEAN("fix_binfmt_elf_mmap", 1), { } };