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authorJohn Denker <jsd@av8n.com>2013-10-10 00:14:46 (GMT)
committerJohn Denker <jsd@av8n.com>2013-10-18 12:33:22 (GMT)
commit8dc7be5e5db5532dfe28aa5329a91939c823e37a (patch)
treee358c647b6a22fb26d5c1f417de99192bd74d319
parent67c471f7fd31c53073b5c04c9555a882a1c5a7e9 (diff)
zero-byte read
-rw-r--r--drivers/char/random.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 157a0b3..254407b 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1292,8 +1292,13 @@ random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
{
ssize_t n, retval = 0, count = 0;
- if (nbytes == 0)
+/*
+ * Kludge: zero-byte read: Fill the pool from upstream sources.
+ */
+ if (nbytes == 0){
+ fill_pool(&blocking_pool, 0);
return 0;
+ }
while (nbytes > 0) {
n = nbytes;