Tue Apr 14 12:33:53 2015 UTC ()
Remove null pointer dereference in the code that never worked before...


(riastradh)
diff -r1.50 -r1.51 src/sys/kern/kern_rndq.c

cvs diff -r1.50 -r1.51 src/sys/kern/Attic/kern_rndq.c (expand / switch to unified diff)

--- src/sys/kern/Attic/kern_rndq.c 2015/04/14 12:28:12 1.50
+++ src/sys/kern/Attic/kern_rndq.c 2015/04/14 12:33:53 1.51
@@ -1,14 +1,14 @@ @@ -1,14 +1,14 @@
1/* $NetBSD: kern_rndq.c,v 1.50 2015/04/14 12:28:12 riastradh Exp $ */ 1/* $NetBSD: kern_rndq.c,v 1.51 2015/04/14 12:33:53 riastradh Exp $ */
2 2
3/*- 3/*-
4 * Copyright (c) 1997-2013 The NetBSD Foundation, Inc. 4 * Copyright (c) 1997-2013 The NetBSD Foundation, Inc.
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * This code is derived from software contributed to The NetBSD Foundation 7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Michael Graff <explorer@flame.org> and Thor Lancelot Simon. 8 * by Michael Graff <explorer@flame.org> and Thor Lancelot Simon.
9 * This code uses ideas and algorithms from the Linux driver written by 9 * This code uses ideas and algorithms from the Linux driver written by
10 * Ted Ts'o. 10 * Ted Ts'o.
11 * 11 *
12 * Redistribution and use in source and binary forms, with or without 12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions 13 * modification, are permitted provided that the following conditions
14 * are met: 14 * are met:
@@ -22,27 +22,27 @@ @@ -22,27 +22,27 @@
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE. 31 * POSSIBILITY OF SUCH DAMAGE.
32 */ 32 */
33 33
34#include <sys/cdefs.h> 34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: kern_rndq.c,v 1.50 2015/04/14 12:28:12 riastradh Exp $"); 35__KERNEL_RCSID(0, "$NetBSD: kern_rndq.c,v 1.51 2015/04/14 12:33:53 riastradh Exp $");
36 36
37#include <sys/param.h> 37#include <sys/param.h>
38#include <sys/atomic.h> 38#include <sys/atomic.h>
39#include <sys/ioctl.h> 39#include <sys/ioctl.h>
40#include <sys/fcntl.h> 40#include <sys/fcntl.h>
41#include <sys/select.h> 41#include <sys/select.h>
42#include <sys/poll.h> 42#include <sys/poll.h>
43#include <sys/kmem.h> 43#include <sys/kmem.h>
44#include <sys/mutex.h> 44#include <sys/mutex.h>
45#include <sys/proc.h> 45#include <sys/proc.h>
46#include <sys/kernel.h> 46#include <sys/kernel.h>
47#include <sys/conf.h> 47#include <sys/conf.h>
48#include <sys/systm.h> 48#include <sys/systm.h>
@@ -1010,27 +1010,27 @@ rnd_hwrng_test(rnd_sample_t *sample) @@ -1010,27 +1010,27 @@ rnd_hwrng_test(rnd_sample_t *sample)
1010 return 0; 1010 return 0;
1011} 1011}
1012 1012
1013/* 1013/*
1014 * Process the events in the ring buffer. Called by rnd_timeout or 1014 * Process the events in the ring buffer. Called by rnd_timeout or
1015 * by the add routines directly if the callout has never fired (that 1015 * by the add routines directly if the callout has never fired (that
1016 * is, if we are "cold" -- just booted). 1016 * is, if we are "cold" -- just booted).
1017 * 1017 *
1018 */ 1018 */
1019static void 1019static void
1020rnd_process_events(void) 1020rnd_process_events(void)
1021{ 1021{
1022 rnd_sample_t *sample = NULL; 1022 rnd_sample_t *sample = NULL;
1023 krndsource_t *source, *badsource = NULL; 1023 krndsource_t *source;
1024 static krndsource_t *last_source; 1024 static krndsource_t *last_source;
1025 uint32_t entropy; 1025 uint32_t entropy;
1026 size_t pool_entropy; 1026 size_t pool_entropy;
1027 int found = 0, wake = 0; 1027 int found = 0, wake = 0;
1028 struct rnd_sampleq dq_samples = SIMPLEQ_HEAD_INITIALIZER(dq_samples); 1028 struct rnd_sampleq dq_samples = SIMPLEQ_HEAD_INITIALIZER(dq_samples);
1029 struct rnd_sampleq df_samples = SIMPLEQ_HEAD_INITIALIZER(df_samples); 1029 struct rnd_sampleq df_samples = SIMPLEQ_HEAD_INITIALIZER(df_samples);
1030 1030
1031 /* 1031 /*
1032 * Drain to the on-stack queue and drop the lock. 1032 * Drain to the on-stack queue and drop the lock.
1033 */ 1033 */
1034 mutex_spin_enter(&rnd_samples.lock); 1034 mutex_spin_enter(&rnd_samples.lock);
1035 while ((sample = SIMPLEQ_FIRST(&rnd_samples.q))) { 1035 while ((sample = SIMPLEQ_FIRST(&rnd_samples.q))) {
1036 found++; 1036 found++;
@@ -1080,27 +1080,27 @@ rnd_process_events(void) @@ -1080,27 +1080,27 @@ rnd_process_events(void)
1080 */ 1080 */
1081 if (source->flags & RND_FLAG_NO_COLLECT) 1081 if (source->flags & RND_FLAG_NO_COLLECT)
1082 goto skip; 1082 goto skip;
1083 1083
1084 /* 1084 /*
1085 * Hardware generators are great but sometimes they 1085 * Hardware generators are great but sometimes they
1086 * have...hardware issues. Don't use any data from 1086 * have...hardware issues. Don't use any data from
1087 * them unless it passes some tests. 1087 * them unless it passes some tests.
1088 */ 1088 */
1089 if (source->type == RND_TYPE_RNG) { 1089 if (source->type == RND_TYPE_RNG) {
1090 if (__predict_false(rnd_hwrng_test(sample))) { 1090 if (__predict_false(rnd_hwrng_test(sample))) {
1091 source->flags |= RND_FLAG_NO_COLLECT; 1091 source->flags |= RND_FLAG_NO_COLLECT;
1092 rnd_printf("rnd: disabling source \"%s\".", 1092 rnd_printf("rnd: disabling source \"%s\".",
1093 badsource->name); 1093 source->name);
1094 goto skip; 1094 goto skip;
1095 } 1095 }
1096 } 1096 }
1097 1097
1098 if (source->flags & RND_FLAG_COLLECT_VALUE) { 1098 if (source->flags & RND_FLAG_COLLECT_VALUE) {
1099 rndpool_add_data(&rnd_pool, sample->values, 1099 rndpool_add_data(&rnd_pool, sample->values,
1100 sample_count * 1100 sample_count *
1101 sizeof(sample->values[1]), 1101 sizeof(sample->values[1]),
1102 0); 1102 0);
1103 } 1103 }
1104 if (source->flags & RND_FLAG_COLLECT_TIME) { 1104 if (source->flags & RND_FLAG_COLLECT_TIME) {
1105 rndpool_add_data(&rnd_pool, sample->ts, 1105 rndpool_add_data(&rnd_pool, sample->ts,
1106 sample_count * 1106 sample_count *