diff options
Diffstat (limited to 'shared/systemd/src/basic/random-util.c')
| -rw-r--r-- | shared/systemd/src/basic/random-util.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/shared/systemd/src/basic/random-util.c b/shared/systemd/src/basic/random-util.c index 86917ca3c7..1a29494466 100644 --- a/shared/systemd/src/basic/random-util.c +++ b/shared/systemd/src/basic/random-util.c @@ -9,6 +9,7 @@ #include <elf.h> #include <errno.h> #include <fcntl.h> +#include <pthread.h> #include <stdbool.h> #include <stdint.h> #include <stdlib.h> @@ -30,6 +31,8 @@ #include "siphash24.h" #include "time-util.h" +static bool srand_called = false; + int rdrand(unsigned long *ret) { /* So, you are a "security researcher", and you wonder why we bother with using raw RDRAND here, @@ -281,8 +284,12 @@ int genuine_random_bytes(void *p, size_t n, RandomFlags flags) { return loop_read_exact(fd, p, n, true); } +static void clear_srand_initialization(void) { + srand_called = false; +} + void initialize_srand(void) { - static bool srand_called = false; + static bool pthread_atfork_registered = false; unsigned x; #if HAVE_SYS_AUXV_H const void *auxv; @@ -318,6 +325,11 @@ void initialize_srand(void) { srand(x); srand_called = true; + + if (!pthread_atfork_registered) { + (void) pthread_atfork(NULL, NULL, clear_srand_initialization); + pthread_atfork_registered = true; + } } /* INT_MAX gives us only 31 bits, so use 24 out of that. */ |