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OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=757
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Dr. Werner Fink 2014-08-27 12:53:07 +00:00 committed by Git OBS Bridge
parent 953927ddbd
commit 6b47e427f8
5 changed files with 141 additions and 0 deletions
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7
systemd-mini.changes
View File

@ -1,3 +1,10 @@
-------------------------------------------------------------------
Wed Aug 27 12:52:09 UTC 2014 - werner@suse.de
- Add patch use-rndaddentropy-ioctl-to-load-random-seed.patch to
use RNDADDENTROPY ioctl to load random-seed and to increase
entropy count as well (bnc#892096)
-------------------------------------------------------------------
Tue Aug 26 12:13:42 UTC 2014 - werner@suse.de

3
systemd-mini.spec
View File

@ -798,6 +798,8 @@ Patch383: 0003-keymap-Fix-HP-Pavillon-DV7.patch
Patch384: 0004-hwdb-update-format-description-and-document-reloadin.patch
# PATCH-FIX-UPSTREAM added at 2014/08/25
Patch385: 0008-hwdb-update.patch
# PATCH-FIX-SUSE Use RNDADDENTROPY ioctl to load random-seed and to increase entropy count as well (bnc#892096)
Patch386: use-rndaddentropy-ioctl-to-load-random-seed.patch
# UDEV PATCHES
# ============
@ -1475,6 +1477,7 @@ cp %{SOURCE7} m4/
%patch383 -p0
%patch384 -p0
%patch385 -p0
%patch386 -p1
# udev patches
%patch1001 -p1

7
systemd.changes
View File

@ -1,3 +1,10 @@
-------------------------------------------------------------------
Wed Aug 27 12:52:09 UTC 2014 - werner@suse.de
- Add patch use-rndaddentropy-ioctl-to-load-random-seed.patch to
use RNDADDENTROPY ioctl to load random-seed and to increase
entropy count as well (bnc#892096)
-------------------------------------------------------------------
Tue Aug 26 12:13:42 UTC 2014 - werner@suse.de

3
systemd.spec
View File

@ -793,6 +793,8 @@ Patch383: 0003-keymap-Fix-HP-Pavillon-DV7.patch
Patch384: 0004-hwdb-update-format-description-and-document-reloadin.patch
# PATCH-FIX-UPSTREAM added at 2014/08/25
Patch385: 0008-hwdb-update.patch
# PATCH-FIX-SUSE Use RNDADDENTROPY ioctl to load random-seed and to increase entropy count as well (bnc#892096)
Patch386: use-rndaddentropy-ioctl-to-load-random-seed.patch
# UDEV PATCHES
# ============
@ -1470,6 +1472,7 @@ cp %{SOURCE7} m4/
%patch383 -p0
%patch384 -p0
%patch385 -p0
%patch386 -p1
# udev patches
%patch1001 -p1

121
use-rndaddentropy-ioctl-to-load-random-seed.patch Normal file
View File

@ -0,0 +1,121 @@
Simply writing /var/lib/systemd/random-seed back to /dev/(u)random does not
increase the entropy bit count. Therefore use the RNDADDENTROPY ioctl to
write back the bytes and increase the entropy bit counter.
Related to bnc#892096
---
systemd-210/src/random-seed/random-seed.c | 66 +++++++++++++++++++++++++++---
1 file changed, 61 insertions(+), 5 deletions(-)
--- systemd-210/src/random-seed/random-seed.c
+++ systemd-210/src/random-seed/random-seed.c 2014-08-27 11:58:59.022526580 +0000
@@ -22,7 +22,9 @@
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
+#include <linux/random.h>
#include <string.h>
+#include <sys/ioctl.h>
#include <sys/stat.h>
#include "log.h"
@@ -32,8 +34,9 @@
#define POOL_SIZE_MIN 512
int main(int argc, char *argv[]) {
- _cleanup_close_ int seed_fd = -1, random_fd = -1;
+ _cleanup_close_ int seed_fd = -1, random_fd = -1, entropy_fd = -1;
_cleanup_free_ void* buf = NULL;
+ size_t entropy_count = 0;
size_t buf_size = 0;
ssize_t k;
int r;
@@ -82,6 +85,23 @@ int main(int argc, char *argv[]) {
if (streq(argv[1], "load")) {
+ entropy_fd = open(RANDOM_SEED_DIR "entropy_count", O_RDONLY|O_CLOEXEC|O_NOCTTY, 0600);
+ if (entropy_fd < 0) {
+ entropy_count = 0;
+ if (errno != ENOENT) {
+ log_error("Failed to open " RANDOM_SEED "/entropy_count: %m");
+ r = -errno;
+ goto finish;
+ }
+ } else {
+ r = read(entropy_fd, &entropy_count, sizeof(entropy_count));
+ if (r < 0) {
+ log_error("Failed to read entropy count file: %m");
+ r = -errno;
+ goto finish;
+ }
+ }
+
seed_fd = open(RANDOM_SEED, O_RDWR|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
if (seed_fd < 0) {
seed_fd = open(RANDOM_SEED, O_RDONLY|O_CLOEXEC|O_NOCTTY);
@@ -113,16 +133,37 @@ int main(int argc, char *argv[]) {
} else {
lseek(seed_fd, 0, SEEK_SET);
- k = loop_write(random_fd, buf, (size_t) k, false);
- if (k <= 0) {
- log_error("Failed to write seed to /dev/urandom: %s", r < 0 ? strerror(-r) : "short write");
+ if (entropy_count && (size_t) k == buf_size) {
+ struct rand_pool_info entropy = {
+ .entropy_count = entropy_count,
+ .buf_size = buf_size,
+ };
+ entropy.buf[0] = ((__u32*)buf)[0];
+ r = ioctl(random_fd, RNDADDENTROPY, &entropy);
+ if (r < 0) {
+ log_error("Failed to write seed to /dev/urandom: %m");
+ r = -errno;
+ }
+ } else {
+ k = loop_write(random_fd, buf, (size_t) k, false);
+ if (k <= 0) {
+ log_error("Failed to write seed to /dev/urandom: %s", r < 0 ? strerror(-r) : "short write");
- r = k == 0 ? -EIO : (int) k;
+ r = k == 0 ? -EIO : (int) k;
+ }
}
}
} else if (streq(argv[1], "save")) {
+ /* Read available entropy count, if possible */
+ f = fopen("/proc/sys/kernel/random/entropy_avail", "re");
+ if (f) {
+ if (fscanf(f, "%zu", &entropy_count) < 0)
+ entropy_count = 0;
+ fclose(f);
+ }
+
seed_fd = open(RANDOM_SEED, O_WRONLY|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
if (seed_fd < 0) {
log_error("Failed to open " RANDOM_SEED ": %m");
@@ -137,6 +178,21 @@ int main(int argc, char *argv[]) {
goto finish;
}
+ if (entropy_count) {
+ entropy_fd = open(RANDOM_SEED_DIR "entropy_count", O_WRONLY|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
+ if (seed_fd < 0) {
+ log_error("Failed to open " RANDOM_SEED_DIR "entropy_count: %m");
+ r = -errno;
+ goto finish;
+ }
+ r = write(entropy_fd, &entropy_count, sizeof(entropy_count));
+ if (r < 0) {
+ log_error("Failed to write entropy count file: %m");
+ r = -errno;
+ goto finish;
+ }
+ }
+
} else {
log_error("Unknown verb %s.", argv[1]);
r = -EINVAL;