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LSM: generalize flag passing to security_capable

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This patch provides a general mechanism for passing flags to the
security_capable LSM hook. It replaces the specific 'audit' flag that is
used to tell security_capable whether it should log an audit message for
the given capability check. The reason for generalizing this flag
passing is so we can add an additional flag that signifies whether
security_capable is being called by a setid syscall (which is needed by
the proposed SafeSetID LSM).

Signed-off-by: Micah Morton <mortonm@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
Micah Morton
2019-01-07 16:10:53 -08:00
committed by James Morris
parent 2233975cd7
commit c1a85a00ea
13 changed files with 71 additions and 67 deletions
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14
security/security.c
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@@ -689,16 +689,12 @@ int security_capset(struct cred *new, const struct cred *old,
effective, inheritable, permitted);
}
int security_capable(const struct cred *cred, struct user_namespace *ns,
int cap)
int security_capable(const struct cred *cred,
struct user_namespace *ns,
int cap,
unsigned int opts)
{
return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
}
int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
int cap)
{
return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
return call_int_hook(capable, 0, cred, ns, cap, opts);
}
int security_quotactl(int cmds, int type, int id, struct super_block *sb)