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| author | Richard Guy Briggs <rgb@redhat.com> | 2017-01-13 11:26:29 +0300 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2017-01-18 22:32:52 +0300 |
| commit | 92c82e8a322b32a6cabe7d8800dc10401157a623 (patch) | |
| tree | 32efb225fd981c63024087f030165baeb37e761c /kernel/audit.c | |
| parent | 89670affa2a62c4868a2dd8a4195a1a2ec58cb27 (diff) | |
| download | linux-92c82e8a322b32a6cabe7d8800dc10401157a623.tar.xz | |
audit: add feature audit_lost reset
Add a method to reset the audit_lost value.
An AUDIT_SET message with the AUDIT_STATUS_LOST flag set by itself
will return a positive value repesenting the current audit_lost value
and reset the counter to zero. If AUDIT_STATUS_LOST is not the
only flag set, the reset command will be ignored. The value sent with
the command is ignored. The return value will be the +ve lost value at
reset time.
An AUDIT_CONFIG_CHANGE message will be queued to the listening audit
daemon. The message will be a standard CONFIG_CHANGE message with the
fields "lost=0" and "old=" with the latter containing the value of
audit_lost at reset time.
See: https://github.com/linux-audit/audit-kernel/issues/3
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index 57acf2541fdd..25dd70a588b2 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -121,7 +121,7 @@ u32 audit_sig_sid = 0; 3) suppressed due to audit_rate_limit 4) suppressed due to audit_backlog_limit */ -static atomic_t audit_lost = ATOMIC_INIT(0); +static atomic_t audit_lost = ATOMIC_INIT(0); /* The netlink socket. */ static struct sock *audit_sock; @@ -1052,6 +1052,12 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (err < 0) return err; } + if (s.mask == AUDIT_STATUS_LOST) { + u32 lost = atomic_xchg(&audit_lost, 0); + + audit_log_config_change("lost", 0, lost, 1); + return lost; + } break; } case AUDIT_GET_FEATURE: |