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authorJohn Johansen <john.johansen@canonical.com>2017-01-16 11:42:43 +0300
committerJohn Johansen <john.johansen@canonical.com>2017-01-16 12:18:35 +0300
commit34c426acb75cc21bdf84685e106db0c1a3565057 (patch)
tree09316c8c181a845b3a7dd81d6b831f9ce11f4537
parent11c236b89d7c26d58c55d5613a858600a4d2ab3a (diff)
downloadlinux-34c426acb75cc21bdf84685e106db0c1a3565057.tar.xz
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 <john.johansen@canonical.com>
-rw-r--r--security/apparmor/apparmorfs.c1
1 files changed, 1 insertions, 0 deletions
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),
{ }
};