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security/selinux: pass 'flags' arg to avc_audit() and avc_has_perm_flags()

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This allows MAY_NOT_BLOCK to be passed, in RCU-walk mode, through
the new avc_has_perm_flags() to avc_audit() and thence the slow_avc_audit.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
NeilBrown 2015-03-23 13:37:39 +11:00 • committed by Al Viro
parent 181548c051
commit 7b20ea2579
3 changed files with 25 additions and 4 deletions
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18
security/selinux/avc.c
View file

@ -761,7 +761,23 @@ int avc_has_perm(u32 ssid, u32 tsid, u16 tclass,
rc = avc_has_perm_noaudit(ssid, tsid, tclass, requested, 0, &avd); rc = avc_has_perm_noaudit(ssid, tsid, tclass, requested, 0, &avd);
rc2 = avc_audit(ssid, tsid, tclass, requested, &avd, rc, auditdata); rc2 = avc_audit(ssid, tsid, tclass, requested, &avd, rc, auditdata, 0);
if (rc2)
return rc2;
return rc;
}
int avc_has_perm_flags(u32 ssid, u32 tsid, u16 tclass,
u32 requested, struct common_audit_data *auditdata,
int flags)
{
struct av_decision avd;
int rc, rc2;
rc = avc_has_perm_noaudit(ssid, tsid, tclass, requested, 0, &avd);
rc2 = avc_audit(ssid, tsid, tclass, requested, &avd, rc,
auditdata, flags);
if (rc2) if (rc2)
return rc2; return rc2;
return rc; return rc;

2
security/selinux/hooks.c
View file

@ -1564,7 +1564,7 @@ static int cred_has_capability(const struct cred *cred,
rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd); rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd);
if (audit == SECURITY_CAP_AUDIT) { if (audit == SECURITY_CAP_AUDIT) {
int rc2 = avc_audit(sid, sid, sclass, av, &avd, rc, &ad); int rc2 = avc_audit(sid, sid, sclass, av, &avd, rc, &ad, 0);
if (rc2) if (rc2)
return rc2; return rc2;
} }

9
security/selinux/include/avc.h
View file

@ -130,7 +130,8 @@ static inline int avc_audit(u32 ssid, u32 tsid,
u16 tclass, u32 requested, u16 tclass, u32 requested,
struct av_decision *avd, struct av_decision *avd,
int result, int result,
struct common_audit_data *a) struct common_audit_data *a,
int flags)
{ {
u32 audited, denied; u32 audited, denied;
audited = avc_audit_required(requested, avd, result, 0, &denied); audited = avc_audit_required(requested, avd, result, 0, &denied);
@ -138,7 +139,7 @@ static inline int avc_audit(u32 ssid, u32 tsid,
return 0; return 0;
return slow_avc_audit(ssid, tsid, tclass, return slow_avc_audit(ssid, tsid, tclass,
requested, audited, denied, result, requested, audited, denied, result,
a, 0); a, flags);
} }
#define AVC_STRICT 1 /* Ignore permissive mode. */ #define AVC_STRICT 1 /* Ignore permissive mode. */
@ -150,6 +151,10 @@ int avc_has_perm_noaudit(u32 ssid, u32 tsid,
int avc_has_perm(u32 ssid, u32 tsid, int avc_has_perm(u32 ssid, u32 tsid,
u16 tclass, u32 requested, u16 tclass, u32 requested,
struct common_audit_data *auditdata); struct common_audit_data *auditdata);
int avc_has_perm_flags(u32 ssid, u32 tsid,
u16 tclass, u32 requested,
struct common_audit_data *auditdata,
int flags);
u32 avc_policy_seqno(void); u32 avc_policy_seqno(void);