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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-24 21:34:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-24 21:34:13 -0700
commit9fe68cad6e74967b88d0c6aeca7d9cd6b6e91942 (patch)
tree1b631b339e2cac5a95881d39ee6c51598e166210 /drivers
parentb5cd891716a9ef118ce8d3a367b6b0fa912447fc (diff)
parent6d4952d9d9d4dc2bb9c0255d95a09405a1e958f7 (diff)
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu: "This fixes a regression caused by the stack vmalloc change" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: hwrng: core - Don't use a stack buffer in add_early_randomness()
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/hw_random/core.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 482794526e8c..d2d2c89de5b4 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -84,14 +84,14 @@ static size_t rng_buffer_size(void)
static void add_early_randomness(struct hwrng *rng)
{
- unsigned char bytes[16];
int bytes_read;
+ size_t size = min_t(size_t, 16, rng_buffer_size());
mutex_lock(&reading_mutex);
- bytes_read = rng_get_data(rng, bytes, sizeof(bytes), 1);
+ bytes_read = rng_get_data(rng, rng_buffer, size, 1);
mutex_unlock(&reading_mutex);
if (bytes_read > 0)
- add_device_randomness(bytes, bytes_read);
+ add_device_randomness(rng_buffer, bytes_read);
}
static inline void cleanup_rng(struct kref *kref)