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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-24 21:34:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-24 21:34:13 -0700 |
| commit | 9fe68cad6e74967b88d0c6aeca7d9cd6b6e91942 (patch) | |
| tree | 1b631b339e2cac5a95881d39ee6c51598e166210 | |
| parent | b5cd891716a9ef118ce8d3a367b6b0fa912447fc (diff) | |
| parent | 6d4952d9d9d4dc2bb9c0255d95a09405a1e958f7 (diff) | |
| download | linux-9fe68cad6e74967b88d0c6aeca7d9cd6b6e91942.tar.gz | |
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()
| -rw-r--r-- | drivers/char/hw_random/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 482794526e8cd5..d2d2c89de5b442 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) |