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authorDavid S. Miller <davem@davemloft.net>2018-08-02 10:55:32 -0700
committerDavid S. Miller <davem@davemloft.net>2018-08-02 10:55:32 -0700
commit89b1698c93a9dee043154f33d96bca9964e705f1 (patch)
treedd9dcb1965baae8edcf0b496aaa6a70609b6fc11 /drivers/char/random.c
parentffd7ce3cd9c294f1ff49ec02cdbd1bc7cb913db6 (diff)
parente30cb13c5a09ff5f043a6570c32e49b063bea6a1 (diff)
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
The BTF conflicts were simple overlapping changes. The virtio_net conflict was an overlap of a fix of statistics counter, happening alongisde a move over to a bonafide statistics structure rather than counting value on the stack. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/char/random.c')
-rw-r--r--drivers/char/random.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index cd888d4ee605..bd449ad52442 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1895,14 +1895,22 @@ static int
write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
{
size_t bytes;
- __u32 buf[16];
+ __u32 t, buf[16];
const char __user *p = buffer;
while (count > 0) {
+ int b, i = 0;
+
bytes = min(count, sizeof(buf));
if (copy_from_user(&buf, p, bytes))
return -EFAULT;
+ for (b = bytes ; b > 0 ; b -= sizeof(__u32), i++) {
+ if (!arch_get_random_int(&t))
+ break;
+ buf[i] ^= t;
+ }
+
count -= bytes;
p += bytes;