GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-06 14:31:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

latent_entropy: Mark functions with __latent_entropy

Browse source 
The __latent_entropy gcc attribute can be used only on functions and
variables.  If it is on a function then the plugin will instrument it for
gathering control-flow entropy. If the attribute is on a variable then
the plugin will initialize it with random contents.  The variable must
be an integer, an integer array type or a structure with integer fields.

These specific functions have been selected because they are init
functions (to help gather boot-time entropy), are called at unpredictable
times, or they have variable loops, each of which provide some level of
latent entropy.

Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: expanded commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Emese Revfy 2016-06-20 20:42:34 +02:00 • committed by Kees Cook
parent 38addce8b6
commit 0766f788eb
19 changed files with 37 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/core/dev.c
View file

@ -3855,7 +3855,7 @@ int netif_rx_ni(struct sk_buff *skb)
}
EXPORT_SYMBOL(netif_rx_ni);
static void net_tx_action(struct softirq_action *h)
static __latent_entropy void net_tx_action(struct softirq_action *h)
{
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
@ -5187,7 +5187,7 @@ out_unlock:
return work;
}
static void net_rx_action(struct softirq_action *h)
static __latent_entropy void net_rx_action(struct softirq_action *h)
{
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
unsigned long time_limit = jiffies + 2;