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5f536ac6a5
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct dm_verity_loadpin_trusted_root_digest. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: dm-devel@redhat.com Cc: Paul Moore <paul@paul-moore.com> Cc: James Morris <jmorris@namei.org> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: linux-security-module@vger.kernel.org Link: https://lore.kernel.org/r/20230817235955.never.762-kees@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
27 lines
617 B
C
27 lines
617 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_DM_VERITY_LOADPIN_H
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#define __LINUX_DM_VERITY_LOADPIN_H
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#include <linux/list.h>
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struct block_device;
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extern struct list_head dm_verity_loadpin_trusted_root_digests;
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struct dm_verity_loadpin_trusted_root_digest {
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struct list_head node;
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unsigned int len;
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u8 data[] __counted_by(len);
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};
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#if IS_ENABLED(CONFIG_SECURITY_LOADPIN_VERITY)
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bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev);
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#else
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static inline bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev)
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{
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return false;
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}
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#endif
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#endif /* __LINUX_DM_VERITY_LOADPIN_H */
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