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authorEmese Revfy <re.emese@gmail.com>2016-06-20 21:42:34 +0300
committerKees Cook <keescook@chromium.org>2016-10-11 00:51:45 +0300
commit0766f788eb727e2e330d55d30545db65bcf2623f (patch)
tree0436ae3b005558a4fb827459fe5c602037fe764a /include/linux/fdtable.h
parent38addce8b600ca335dc86fa3d48c890f1c6fa1f4 (diff)
downloadlinux-0766f788eb727e2e330d55d30545db65bcf2623f.tar.xz
latent_entropy: Mark functions with __latent_entropy
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>
Diffstat (limited to 'include/linux/fdtable.h')
-rw-r--r--include/linux/fdtable.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 5295535b60c6..9852c7e33466 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -105,7 +105,7 @@ struct files_struct *get_files_struct(struct task_struct *);
void put_files_struct(struct files_struct *fs);
void reset_files_struct(struct files_struct *);
int unshare_files(struct files_struct **);
-struct files_struct *dup_fd(struct files_struct *, int *);
+struct files_struct *dup_fd(struct files_struct *, int *) __latent_entropy;
void do_close_on_exec(struct files_struct *);
int iterate_fd(struct files_struct *, unsigned,
int (*)(const void *, struct file *, unsigned),