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Now that IPC and other changes have landed, enable manual markings for

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randstruct plugin, including the task_struct.
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 Version: GnuPG v1
 Comment: Kees Cook <kees@outflux.net>
 
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Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull structure randomization updates from Kees Cook:
 "Now that IPC and other changes have landed, enable manual markings for
  randstruct plugin, including the task_struct.

  This is the rest of what was staged in -next for the gcc-plugins, and
  comes in three patches, largest first:

   - mark "easy" structs with __randomize_layout

   - mark task_struct with an optional anonymous struct to isolate the
     __randomize_layout section

   - mark structs to opt _out_ of automated marking (which will come
     later)

  And, FWIW, this continues to pass allmodconfig (normal and patched to
  enable gcc-plugins) builds of x86_64, i386, arm64, arm, powerpc, and
  s390 for me"

* tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  randstruct: opt-out externally exposed function pointer structs
  task_struct: Allow randomized layout
  randstruct: Mark various structs for randomization
This commit is contained in:
Linus Torvalds 2017-07-19 08:55:18 -07:00
commit e06fdaf40a
42 changed files with 97 additions and 66 deletions
Download patch file Download diff file Expand all files Collapse all files

17
include/linux/fs.h
View file

@ -296,7 +296,7 @@ struct kiocb {
void *private;
int ki_flags;
enum rw_hint ki_hint;
};
} __randomize_layout;
static inline bool is_sync_kiocb(struct kiocb *kiocb)
{
@ -404,7 +404,7 @@ struct address_space {
struct list_head private_list; /* ditto */
void *private_data; /* ditto */
errseq_t wb_err;
} __attribute__((aligned(sizeof(long))));
} __attribute__((aligned(sizeof(long)))) __randomize_layout;
/*
* On most architectures that alignment is already the case; but
* must be enforced here for CRIS, to let the least significant bit
@ -447,7 +447,7 @@ struct block_device {
int bd_fsfreeze_count;
/* Mutex for freeze */
struct mutex bd_fsfreeze_mutex;
};
} __randomize_layout;
/*
* Radix-tree tags, for tagging dirty and writeback pages within the pagecache
@ -666,7 +666,7 @@ struct inode {
#endif
void *i_private; /* fs or device private pointer */
};
} __randomize_layout;
static inline unsigned int i_blocksize(const struct inode *node)
{
@ -883,7 +883,8 @@ struct file {
#endif /* #ifdef CONFIG_EPOLL */
struct address_space *f_mapping;
errseq_t f_wb_err;
} __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
} __randomize_layout
__attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
struct file_handle {
__u32 handle_bytes;
@ -1020,7 +1021,7 @@ struct file_lock {
int state; /* state of grant or error if -ve */
} afs;
} fl_u;
};
} __randomize_layout;
struct file_lock_context {
spinlock_t flc_lock;
@ -1412,7 +1413,7 @@ struct super_block {
spinlock_t s_inode_wblist_lock;
struct list_head s_inodes_wb; /* writeback inodes */
};
} __randomize_layout;
/* Helper functions so that in most cases filesystems will
* not need to deal directly with kuid_t and kgid_t and can
@ -1698,7 +1699,7 @@ struct file_operations {
u64);
ssize_t (*dedupe_file_range)(struct file *, u64, u64, struct file *,
u64);
};
} __randomize_layout;
struct inode_operations {
struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);