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| author | Eric Biggers <ebiggers3@gmail.com> | 2016-05-05 04:08:39 +0300 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-08-19 10:51:15 +0300 |
| commit | 6c1ff19426bed544da5e0ee7be56c7f52a330e44 (patch) | |
| tree | 2c34ec5acd37f3ea27c8c80c6725f8cabb8df747 /drivers/char | |
| parent | a9e92162c1a6b80e02c55b90d4784880081aa3a0 (diff) | |
| download | linux-6c1ff19426bed544da5e0ee7be56c7f52a330e44.tar.xz | |
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: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/char')
| -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 f6b25db16791..85e771c26488 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1465,13 +1465,15 @@ 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; |