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| author | Eric Biggers <ebiggers3@gmail.com> | 2016-05-04 21:08:39 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 13:16:23 +0200 |
| commit | 1025503bcee906294709868e3d797dfc1e876433 (patch) | |
| tree | 197714337b4aa53b6b306d5b1c66e40dbf52f0c1 | |
| parent | baae8c3c2e2a41aff63cd85767c89c6166d8b58c (diff) | |
| download | linux-stable-1025503bcee906294709868e3d797dfc1e876433.tar.gz linux-stable-1025503bcee906294709868e3d797dfc1e876433.tar.bz2 linux-stable-1025503bcee906294709868e3d797dfc1e876433.zip | |
random: properly align get_random_int_hash
commit b1132deac01c2332d234fa821a70022796b79182 upstream.
get_random_long() reads from the get_random_int_hash array using an
unsigned long pointer. For this code to be guaranteed correct on all
architectures, the array must be aligned to an unsigned long boundary.
Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/random.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index d93dfebae0bb..1822472dffab 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1798,13 +1798,15 @@ int random_int_secret_init(void) return 0; } +static DEFINE_PER_CPU(__u32 [MD5_DIGEST_WORDS], get_random_int_hash) + __aligned(sizeof(unsigned long)); + /* * Get a random word for internal kernel use only. Similar to urandom but * with the goal of minimal entropy pool depletion. As a result, the random * value is not cryptographically secure but for several uses the cost of * depleting entropy is too high */ -static DEFINE_PER_CPU(__u32 [MD5_DIGEST_WORDS], get_random_int_hash); unsigned int get_random_int(void) { __u32 *hash; |