From b7d44d9487a11e835de10908f4ab30b4290c0b7f Mon Sep 17 00:00:00 2001 From: Satoru Takeuchi Date: Wed, 20 Mar 2013 11:28:51 +1030 Subject: [PATCH] hw_random: free rng_buffer at module exit rng-core module allocates rng_buffer by kmalloc() since commit f7f154f1246ccc5a0a7e9ce50932627d60a0c878. But this buffer won't be freed and there is a memory leak possibility at module exit. Signed-off-by: Satoru Takeuchi Signed-off-by: Rusty Russell --- drivers/char/hw_random/core.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 69ae597..a0f7724 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -380,6 +380,15 @@ void hwrng_unregister(struct hwrng *rng) } EXPORT_SYMBOL_GPL(hwrng_unregister); +static void __exit hwrng_exit(void) +{ + mutex_lock(&rng_mutex); + BUG_ON(current_rng); + kfree(rng_buffer); + mutex_unlock(&rng_mutex); +} + +module_exit(hwrng_exit); MODULE_DESCRIPTION("H/W Random Number Generator (RNG) driver"); MODULE_LICENSE("GPL"); -- 2.7.4