Re: [PATCH ghak90 V5 06/10] audit: add support for non-syscall auxiliary records

On 2019-04-01 10:49, Paul Moore wrote: > On Fri, Mar 15, 2019 at 2:34 PM Richard Guy Briggs <rgb(a)redhat.com&gt; wrote: > > Standalone audit records have the timestamp and serial number generated > > on the fly and as such are unique, making them standalone. This new > > function audit_alloc_local() generates a local audit context that will > > be used only for a standalone record and its auxiliary record(s). The > > context is discarded immediately after the local associated records are > > produced. > > > > Signed-off-by: Richard Guy Briggs <rgb(a)redhat.com&gt; > > Acked-by: Serge Hallyn <serge(a)hallyn.com&gt; > > --- > > include/linux/audit.h | 8 ++++++++ > > kernel/audit.h | 1 + > > kernel/auditsc.c | 35 ++++++++++++++++++++++++++++++----- > > 3 files changed, 39 insertions(+), 5 deletions(-) > > ... > > > diff --git a/include/linux/audit.h b/include/linux/audit.h > > index ebd6625ca80e..6db5aba7cc01 100644 > > --- a/include/linux/audit.h > > +++ b/include/linux/audit.h > > @@ -285,6 +285,8 @@ static inline void audit_log_contid(struct audit_context *context, u64 contid) > > > > /* These are defined in auditsc.c */ > > /* Public API */ > > +extern struct audit_context *audit_alloc_local(gfp_t gfpflags); > > +extern void audit_free_context(struct audit_context *context); > > extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1, > > unsigned long a2, unsigned long a3); > > extern void __audit_syscall_exit(int ret_success, long ret_value); > > @@ -512,6 +514,12 @@ static inline void audit_fanotify(unsigned int response) > > extern int audit_n_rules; > > extern int audit_signals; > > #else /* CONFIG_AUDITSYSCALL */ > > +static inline struct audit_context *audit_alloc_local(gfp_t gfpflags) > > +{ > > + return NULL; > > +} > > +static inline void audit_free_context(struct audit_context *context) > > +{ } > > static inline void audit_syscall_entry(int major, unsigned long a0, > > unsigned long a1, unsigned long a2, > > unsigned long a3) > > diff --git a/kernel/audit.h b/kernel/audit.h > > index c5ac6436317e..2a1a8b8a8019 100644 > > --- a/kernel/audit.h > > +++ b/kernel/audit.h > > @@ -111,6 +111,7 @@ struct audit_proctitle { > > struct audit_context { > > int dummy; /* must be the first element */ > > int in_syscall; /* 1 if task is in a syscall */ > > + bool local; /* local context needed */ > > It's very possible I've missed it, but "local" never gets used in any > meaningful way in this patchset does it? It is used in audit_alloc_local() to signal to audit_get_stamp() that in absence of a syscall flag, check for a local flag to continue rather than return.