Merge tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening updates from Kees Cook:

 - Fix Sparse warnings with randomizd kstack (GONG, Ruiqi)

 - Replace uintptr_t with unsigned long in usercopy (Jason A. Donenfeld)

 - Fix Clang -Wforward warning in LKDTM (Justin Stitt)

 - Fix comment to correctly refer to STRICT_DEVMEM (Lukas Bulwahn)

 - Introduce dm-verity binding logic to LoadPin LSM (Matthias Kaehlcke)

 - Clean up warnings and overflow and KASAN tests (Kees Cook)

* tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  dm: verity-loadpin: Drop use of dm_table_get_num_targets()
  kasan: test: Silence GCC 12 warnings
  drivers: lkdtm: fix clang -Wformat warning
  x86: mm: refer to the intended config STRICT_DEVMEM in a comment
  dm: verity-loadpin: Use CONFIG_SECURITY_LOADPIN_VERITY for conditional compilation
  LoadPin: Enable loading from trusted dm-verity devices
  dm: Add verity helpers for LoadPin
  stack: Declare {randomize_,}kstack_offset to fix Sparse warnings
  lib: overflow: Do not define 64-bit tests on 32-bit
  MAINTAINERS: Add a general "kernel hardening" section
  usercopy: use unsigned long instead of uintptr_t

1 files changed, 27 insertions, 0 deletions

diff --git a/include/linux/dm-verity-loadpin.h b/include/linux/dm-verity-loadpin.h
new file mode 100644
index 000000000000..552b817ab102
--- /dev/null
+++ b/include/linux/dm-verity-loadpin.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LINUX_DM_VERITY_LOADPIN_H
+#define __LINUX_DM_VERITY_LOADPIN_H
+
+#include <linux/list.h>
+
+struct block_device;
+
+extern struct list_head dm_verity_loadpin_trusted_root_digests;
+
+struct dm_verity_loadpin_trusted_root_digest {
+	struct list_head node;
+	unsigned int len;
+	u8 data[];
+};
+
+#if IS_ENABLED(CONFIG_SECURITY_LOADPIN_VERITY)
+bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev);
+#else
+static inline bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev)
+{
+	return false;
+}
+#endif
+
+#endif /* __LINUX_DM_VERITY_LOADPIN_H */