On Mon, Jan 30, 2023 at 5:58 PM Fan Wu <wufan@xxxxxxxxxxxxxxxxxxx> wrote: > > From: Deven Bowers <deven.desai@xxxxxxxxxxxxxxxxxxx> > > IPE, like SELinux, supports a permissive mode. This mode allows policy > authors to test and evaluate IPE policy without it effecting their > programs. When the mode is changed, a 1404 AUDIT_MAC_STATUS > be reported. > > This patch adds the following audit records: > > audit: MAC_STATUS permissive=1 auid=4294967295 ses=4294967295 lsm=ipe > res=1 > audit: MAC_STATUS permissive=0 auid=4294967295 ses=4294967295 lsm=ipe > res=1 > > These records are emitted within the following events: > > audit: MAC_STATUS permissive=1 auid=4294967295 ses=4294967295 lsm=ipe > res=1 > audit[185]: SYSCALL arch=c000003e syscall=1 success=yes exit=2 a0=1 > a1=56308bb3ecc0 a2=2 a3=7f290fdc53e0 items=0 ppid=183 pid=185 > auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 > tty=pts0 ses=4294967295 comm="bash" exe="/usr/bin/bash" key=(null) > audit: PROCTITLE proctitle="-bash" > audit: MAC_STATUS permissive=0 auid=4294967295 ses=4294967295 lsm=ipe > res=1 > audit[185]: SYSCALL arch=c000003e syscall=1 success=yes exit=2 a0=1 > a1=56308bb3ecc0 a2=2 a3=7f290fdc53e0 items=0 ppid=183 pid=185 > auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 > tty=pts0 ses=4294967295 comm="bash" exe="/usr/bin/bash" key=(null) > audit: PROCTITLE proctitle="-bash" > > Implying user used bash to toggle the switch. > > Signed-off-by: Deven Bowers <deven.desai@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Fan Wu <wufan@xxxxxxxxxxxxxxxxxxx> ... > --- > security/ipe/audit.c | 36 +++++++++++++++++++++++ > security/ipe/audit.h | 1 + > security/ipe/eval.c | 9 ++++++ > security/ipe/eval.h | 1 + > security/ipe/fs.c | 69 ++++++++++++++++++++++++++++++++++++++++++-- > 5 files changed, 114 insertions(+), 2 deletions(-) > > diff --git a/security/ipe/audit.c b/security/ipe/audit.c > index 295e9f9f5146..ff74026a595f 100644 > --- a/security/ipe/audit.c > +++ b/security/ipe/audit.c > @@ -194,3 +194,39 @@ void ipe_audit_policy_load(const struct ipe_policy *const p) > > audit_log_end(ab); > } > + > +/** > + * ipe_audit_enforce - Audit a change in IPE's enforcement state. > + */ > +void ipe_audit_enforce(void) > +{ > + struct audit_buffer *ab; > + > + ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS); > + if (!ab) > + return; > + > + audit_log_format(ab, "permissive=%d", !READ_ONCE(enforce)); > + audit_log_format(ab, " auid=%u ses=%u lsm=ipe res=1", > + from_kuid(&init_user_ns, audit_get_loginuid(current)), > + audit_get_sessionid(current)); > + > + audit_log_end(ab); > +} See the earlier comments in the patchset about consistent formatting of a given record type. To the best of my knowledge only SELinux currently uses the AUDIT_MAC_STATUS record and an example can be found in `sel_write_enforce()`. The good news is that it looks like that format could be made to work here without too much fuss. > +/** > + * emit_enforcement - Emit the enforcement state of IPE started with. > + * > + * Return: > + * 0 - Always > + */ > +static int emit_enforcement(void) > +{ > + if (!ipe_enabled) > + return -EOPNOTSUPP; > + > + ipe_audit_enforce(); > + return 0; > +} > + > +late_initcall(emit_enforcement); -- paul-moore.com
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