xnu-4570.51.1.tar.gz

[apple/xnu.git] / bsd / kern / sys_generic.c

diff --git a/bsd/kern/sys_generic.c b/bsd/kern/sys_generic.c
index bd8fd7c2291d3fe0593e30e02c5b85bb0e5b9c0b..9cfbe7e9176d473723d6898c581d857b6dead11f 100644 (file)
--- a/bsd/kern/sys_generic.c
+++ b/bsd/kern/sys_generic.c
@@ -97,6 +97,7 @@
 #include <sys/proc.h>
 #include <sys/kauth.h>
 
+#include <machine/smp.h>
 #include <mach/mach_types.h>
 #include <kern/kern_types.h>
 #include <kern/assert.h>
@@ -140,6 +141,10 @@
 #include <kern/kalloc.h>
 #include <sys/vnode_internal.h>
 
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+
 /* XXX should be in a header file somewhere */
 void evsofree(struct socket *);
 void evpipefree(struct pipe *);
@@ -159,7 +164,6 @@ __private_extern__ int      dofilewrite(vfs_context_t ctx, struct fileproc *fp,
 __private_extern__ int preparefileread(struct proc *p, struct fileproc **fp_ret, int fd, int check_for_vnode);
 __private_extern__ void        donefileread(struct proc *p, struct fileproc *fp_ret, int fd);
 
-
 /* Conflict wait queue for when selects collide (opaque type) */
 struct waitq select_conflict_queue;
 
@@ -770,7 +774,7 @@ ioctl(struct proc *p, struct ioctl_args *uap, __unused int32_t *retval)
        boolean_t is64bit = FALSE;
        int tmp = 0;
 #define STK_PARAMS     128
-       char stkbuf[STK_PARAMS];
+       char stkbuf[STK_PARAMS] = {};
        int fd = uap->fd;
        u_long com = uap->com;
        struct vfs_context context = *vfs_context_current();
@@ -1789,6 +1793,14 @@ poll_nocancel(struct proc *p, struct poll_nocancel_args *uap, int32_t *retval)
        if (nfds && (rfds == nfds))
                goto done;
 
+       /*
+        * If any events have trouble registering, an event has fired and we
+        * shouldn't wait for events in kqueue_scan -- use the current time as
+        * the deadline.
+        */
+       if (rfds)
+               getmicrouptime(&atv);
+
        /* scan for, and possibly wait for, the kevents to trigger */
        cont->pca_fds = uap->fds;
        cont->pca_nfds = nfds;
@@ -3103,6 +3115,14 @@ gethostuuid(struct proc *p, struct gethostuuid_args *uap, __unused int32_t *retv
        __darwin_uuid_t uuid_kern;      /* for IOKit call */
 
        if (!uap->spi) {
+#if CONFIG_EMBEDDED
+#if CONFIG_MACF
+               if ((error = mac_system_check_info(kauth_cred_get(), "hw.uuid")) != 0) {
+                       /* EPERM invokes userspace upcall if present */
+                       return (error);
+               }
+#endif
+#endif
        }
 
        /* Convert the 32/64 bit timespec into a mach_timespec_t */
@@ -3164,9 +3184,11 @@ ledger(struct proc *p, struct ledger_args *args, __unused int32_t *retval)
                error = copyin(args->arg3, (char *)&len, sizeof (len));
        else if (args->cmd == LEDGER_TEMPLATE_INFO)
                error = copyin(args->arg2, (char *)&len, sizeof (len));
-#ifdef LEDGER_DEBUG
        else if (args->cmd == LEDGER_LIMIT)
+#ifdef LEDGER_DEBUG
                error = copyin(args->arg2, (char *)&lla, sizeof (lla));
+#else
+               return (EINVAL);
 #endif
        else if ((args->cmd < 0) || (args->cmd > LEDGER_MAX_CMD))
                return (EINVAL);
@@ -3279,7 +3301,7 @@ telemetry(__unused struct proc *p, struct telemetry_args *args, __unused int32_t
        return (error);
 }
 
-#if defined(DEVELOPMENT) || defined(DEBUG)
+#if DEVELOPMENT || DEBUG
 #if CONFIG_WAITQ_DEBUG
 static uint64_t g_wqset_num = 0;
 struct g_wqset {
@@ -3659,4 +3681,6 @@ SYSCTL_PROC(_kern, OID_AUTO, wqset_clear_preposts, CTLTYPE_QUAD | CTLFLAG_RW | C
            0, 0, sysctl_wqset_clear_preposts, "Q", "clear preposts on given waitq set");
 
 #endif /* CONFIG_WAITQ_DEBUG */
-#endif /* defined(DEVELOPMENT) || defined(DEBUG) */
+#endif /* DEVELOPMENT || DEBUG */
+
+