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latent_entropy: Mark functions with __latent_entropy

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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 <[email protected]>
[kees: expanded commit message]
Signed-off-by: Kees Cook <[email protected]>
This commit is contained in:
Emese Revfy 2016-06-20 20:42:34 +02:00 • committed by Kees Cook
commit 0766f788eb
19 changed files with 37 additions and 22 deletions
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1
fs/namespace.c
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@ -2759,6 +2759,7 @@ static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
return new_ns;
}
__latent_entropy
struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
struct user_namespace *user_ns, struct fs_struct *new_fs)
{