diff mbox series

[RFC,v13,17/20] ipe: enable support for fs-verity as a trust provider

Message ID 1709168102-7677-18-git-send-email-wufan@linux.microsoft.com (mailing list archive)
State New, archived
Headers show
Series Integrity Policy Enforcement LSM (IPE) | expand

Commit Message

Fan Wu Feb. 29, 2024, 12:54 a.m. UTC 
Enable IPE policy authors to indicate trust for a singular fsverity
file, identified by the digest information, through "fsverity_digest"
and all files using fsverity's builtin signatures via
"fsverity_signature".

This enables file-level integrity claims to be expressed in IPE,
allowing individual files to be authorized, giving some flexibility
for policy authors. Such file-level claims are important to be expressed
for enforcing the integrity of packages, as well as address some of the
scalability issues in a sole dm-verity based solution (# of loop back
devices, etc).

This solution cannot be done in userspace as the minimum threat that
IPE should mitigate is an attacker downloads malicious payload with
all required dependencies. These dependencies can lack the userspace
check, bypassing the protection entirely. A similar attack succeeds if
the userspace component is replaced with a version that does not
perform the check. As a result, this can only be done in the common
entry point - the kernel.

Signed-off-by: Deven Bowers <deven.desai@linux.microsoft.com>
Signed-off-by: Fan Wu <wufan@linux.microsoft.com>

---
v1-v6:
  + Not present

v7:
  Introduced

v8:
  * Undo squash of 08/12, 10/12 - separating drivers/md/ from security/
  * Use common-audit function for fsverity_signature.
  + Change fsverity implementation to use fsverity_get_digest
  + prevent unnecessary copy of fs-verity signature data, instead
    just check for presence of signature data.
  + Remove free_inode_security hook, as the digest is now acquired
    at runtime instead of via LSM blob.

v9:
  + Adapt to the new parser

v10:
  + Update the fsverity get digest call

v11:
  + No changes

v12:
  + Fix audit format
  + Simplify property evaluation

v13:
  + Remove the CONFIG_IPE_PROP_FS_VERITY dependency inside the parser
    to make the policy grammar independent of the kernel config.
---
 security/ipe/Kconfig         |  13 +++++
 security/ipe/audit.c         |  17 ++++++
 security/ipe/eval.c          | 108 ++++++++++++++++++++++++++++++++++-
 security/ipe/eval.h          |  10 ++++
 security/ipe/hooks.c         |  30 ++++++++++
 security/ipe/hooks.h         |   7 +++
 security/ipe/ipe.c           |  13 +++++
 security/ipe/ipe.h           |   3 +
 security/ipe/policy.h        |   3 +
 security/ipe/policy_parser.c |   6 ++
 10 files changed, 209 insertions(+), 1 deletion(-)

Comments

Randy Dunlap Feb. 29, 2024, 4:01 a.m. UTC | #1 
On 2/28/24 16:54, Fan Wu wrote:
> diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig
> index 7afb1ce0cb99..9dd5c4769d79 100644
> --- a/security/ipe/Kconfig
> +++ b/security/ipe/Kconfig
> @@ -30,6 +30,19 @@ config IPE_PROP_DM_VERITY
>  	  that was mounted with a signed root-hash or the volume's
>  	  root hash matches the supplied value in the policy.
>  
> +	  If unsure, answer Y.
> +
> +config IPE_PROP_FS_VERITY
> +	bool "Enable property for fs-verity files"
> +	depends on FS_VERITY && FS_VERITY_BUILTIN_SIGNATURES
> +	help
> +	  This option enables the usage of properties "fsverity_signature"
> +	  and "fsverity_digest". These properties evaluates to TRUE when
> +	  a file is fsverity enabled and with a signed digest or its
> +	  diegst matches the supplied value in the policy.

	  digest

> +
> +	  if unsure, answer Y.
Eric Biggers Feb. 29, 2024, 4:46 a.m. UTC | #2 
On Wed, Feb 28, 2024 at 04:54:59PM -0800, Fan Wu wrote:
> diff --git a/security/ipe/hooks.c b/security/ipe/hooks.c
> index f5190a1347a6..ca1573ff21b7 100644
> --- a/security/ipe/hooks.c
> +++ b/security/ipe/hooks.c
> @@ -254,3 +254,33 @@ int ipe_bdev_setsecurity(struct block_device *bdev, const char *key,
>  	return -EOPNOTSUPP;
>  }
>  #endif /* CONFIG_IPE_PROP_DM_VERITY */
> +
> +#ifdef CONFIG_IPE_PROP_FS_VERITY
> +/**
> + * ipe_inode_setsecurity - Sets fields of a inode security blob from @key.
> + * @inode: The inode to source the security blob from.
> + * @name: The name representing the information to be stored.
> + * @value: The value to be stored.
> + * @size: The size of @value.
> + * @flags: unused
> + *
> + * Saves fsverity signature & digest into inode security blob
> + *
> + * Return:
> + * * 0	- OK
> + * * !0	- Error
> + */
> +int ipe_inode_setsecurity(struct inode *inode, const char *name,
> +			  const void *value, size_t size,
> +			  int flags)
> +{
> +	struct ipe_inode *inode_sec = ipe_inode(inode);
> +
> +	if (!strcmp(name, FS_VERITY_INODE_SEC_NAME)) {
> +		inode_sec->fs_verity_signed = size > 0 && value;
> +		return 0;
> +	}
> +
> +	return -EOPNOTSUPP;
> +}

So IPE is interested in whether a file has an fsverity builtin signature, but it
doesn't care what the signature is or whether it has been checked.  What is the
point?

- Eric
Fan Wu Feb. 29, 2024, 6:59 p.m. UTC | #3 
On 2/28/2024 8:46 PM, Eric Biggers wrote:
> On Wed, Feb 28, 2024 at 04:54:59PM -0800, Fan Wu wrote:
>> diff --git a/security/ipe/hooks.c b/security/ipe/hooks.c
>> index f5190a1347a6..ca1573ff21b7 100644
>> --- a/security/ipe/hooks.c
>> +++ b/security/ipe/hooks.c
>> @@ -254,3 +254,33 @@ int ipe_bdev_setsecurity(struct block_device *bdev, const char *key,
>>   	return -EOPNOTSUPP;
>>   }
>>   #endif /* CONFIG_IPE_PROP_DM_VERITY */
>> +
>> +#ifdef CONFIG_IPE_PROP_FS_VERITY
>> +/**
>> + * ipe_inode_setsecurity - Sets fields of a inode security blob from @key.
>> + * @inode: The inode to source the security blob from.
>> + * @name: The name representing the information to be stored.
>> + * @value: The value to be stored.
>> + * @size: The size of @value.
>> + * @flags: unused
>> + *
>> + * Saves fsverity signature & digest into inode security blob
>> + *
>> + * Return:
>> + * * 0	- OK
>> + * * !0	- Error
>> + */
>> +int ipe_inode_setsecurity(struct inode *inode, const char *name,
>> +			  const void *value, size_t size,
>> +			  int flags)
>> +{
>> +	struct ipe_inode *inode_sec = ipe_inode(inode);
>> +
>> +	if (!strcmp(name, FS_VERITY_INODE_SEC_NAME)) {
>> +		inode_sec->fs_verity_signed = size > 0 && value;
>> +		return 0;
>> +	}
>> +
>> +	return -EOPNOTSUPP;
>> +}
> 
> So IPE is interested in whether a file has an fsverity builtin signature, but it
> doesn't care what the signature is or whether it has been checked.  What is the
> point?
> 
> - Eric

It does make sure the signature is checked. This hook call can only be 
triggered after fsverity_verify_signature() succeed. Therefore, for 
files that are marked with the security blob inode_sec->fs_verity_sign 
as true, they must successfully pass the fsverity_verify_signature() check.

Regarding the other question, the current version does not support 
defining policies to trust files based on the inner content of their 
signatures because the current patch set is already too large.

We plan to introduce new policy grammars to enable the policy to define 
which certificate of the signature can be trusted after this version is 
accepted.

-Fan
Eric Biggers Feb. 29, 2024, 7:42 p.m. UTC | #4 
On Thu, Feb 29, 2024 at 10:59:21AM -0800, Fan Wu wrote:
> > 
> > So IPE is interested in whether a file has an fsverity builtin signature, but it
> > doesn't care what the signature is or whether it has been checked.  What is the
> > point?
> > 
> > - Eric
> 
> It does make sure the signature is checked. This hook call can only be
> triggered after fsverity_verify_signature() succeed. Therefore, for files
> that are marked with the security blob inode_sec->fs_verity_sign as true,
> they must successfully pass the fsverity_verify_signature() check.
> 
> Regarding the other question, the current version does not support defining
> policies to trust files based on the inner content of their signatures
> because the current patch set is already too large.
> 
> We plan to introduce new policy grammars to enable the policy to define
> which certificate of the signature can be trusted after this version is
> accepted.

Ah, I see, you're relying on the fact that fsverity_verify_signature() verifies
the signature (if present) even if fs.verity.require_signatures hasn't been set.
That does happen to be its behavior, but this isn't clearly documented since
there previously wasn't really a use case for the builtin signatures without
setting fs.verity.require_signatures.  Can you please make sure this behavior is
documented properly in Documentation/filesystems/fsverity.rst and in function
comments?  Otherwise I worry that it could get changed and break your code.

- Eric
Fan Wu Feb. 29, 2024, 7:59 p.m. UTC | #5 
On 2/29/2024 11:42 AM, Eric Biggers wrote:
> On Thu, Feb 29, 2024 at 10:59:21AM -0800, Fan Wu wrote:
>>>
>>> So IPE is interested in whether a file has an fsverity builtin signature, but it
>>> doesn't care what the signature is or whether it has been checked.  What is the
>>> point?
>>>
>>> - Eric
>>
>> It does make sure the signature is checked. This hook call can only be
>> triggered after fsverity_verify_signature() succeed. Therefore, for files
>> that are marked with the security blob inode_sec->fs_verity_sign as true,
>> they must successfully pass the fsverity_verify_signature() check.
>>
>> Regarding the other question, the current version does not support defining
>> policies to trust files based on the inner content of their signatures
>> because the current patch set is already too large.
>>
>> We plan to introduce new policy grammars to enable the policy to define
>> which certificate of the signature can be trusted after this version is
>> accepted.
> 
> Ah, I see, you're relying on the fact that fsverity_verify_signature() verifies
> the signature (if present) even if fs.verity.require_signatures hasn't been set.
> That does happen to be its behavior, but this isn't clearly documented since
> there previously wasn't really a use case for the builtin signatures without
> setting fs.verity.require_signatures.  Can you please make sure this behavior is
> documented properly in Documentation/filesystems/fsverity.rst and in function
> comments?  Otherwise I worry that it could get changed and break your code.
> 
> - Eric

Thanks for the suggestion. I will add this info in the next version.
-Fan
diff mbox series

Patch

diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig
index 7afb1ce0cb99..9dd5c4769d79 100644
--- a/security/ipe/Kconfig
+++ b/security/ipe/Kconfig
@@ -30,6 +30,19 @@  config IPE_PROP_DM_VERITY
 	  that was mounted with a signed root-hash or the volume's
 	  root hash matches the supplied value in the policy.
 
+	  If unsure, answer Y.
+
+config IPE_PROP_FS_VERITY
+	bool "Enable property for fs-verity files"
+	depends on FS_VERITY && FS_VERITY_BUILTIN_SIGNATURES
+	help
+	  This option enables the usage of properties "fsverity_signature"
+	  and "fsverity_digest". These properties evaluates to TRUE when
+	  a file is fsverity enabled and with a signed digest or its
+	  diegst matches the supplied value in the policy.
+
+	  if unsure, answer Y.
+
 endmenu
 
 endif
diff --git a/security/ipe/audit.c b/security/ipe/audit.c
index 3acbfecc9f43..f508944a3ed1 100644
--- a/security/ipe/audit.c
+++ b/security/ipe/audit.c
@@ -53,6 +53,9 @@  static const char *const audit_prop_names[__IPE_PROP_MAX] = {
 	"dmverity_roothash=",
 	"dmverity_signature=FALSE",
 	"dmverity_signature=TRUE",
+	"fsverity_digest=",
+	"fsverity_signature=FALSE",
+	"fsverity_signature=TRUE",
 };
 
 /**
@@ -66,6 +69,17 @@  static void audit_dmv_roothash(struct audit_buffer *ab, const void *rh)
 	ipe_digest_audit(ab, rh);
 }
 
+/**
+ * audit_fsv_digest - audit the digest of a fsverity_digest property.
+ * @ab: Supplies a pointer to the audit_buffer to append to.
+ * @d: Supplies a pointer to the digest structure.
+ */
+static void audit_fsv_digest(struct audit_buffer *ab, const void *d)
+{
+	audit_log_format(ab, "%s", audit_prop_names[IPE_PROP_FSV_DIGEST]);
+	ipe_digest_audit(ab, d);
+}
+
 /**
  * audit_rule - audit an IPE policy rule approximation.
  * @ab: Supplies a pointer to the audit_buffer to append to.
@@ -82,6 +96,9 @@  static void audit_rule(struct audit_buffer *ab, const struct ipe_rule *r)
 		case IPE_PROP_DMV_ROOTHASH:
 			audit_dmv_roothash(ab, ptr->value);
 			break;
+		case IPE_PROP_FSV_DIGEST:
+			audit_fsv_digest(ab, ptr->value);
+			break;
 		default:
 			audit_log_format(ab, "%s", audit_prop_names[ptr->type]);
 			break;
diff --git a/security/ipe/eval.c b/security/ipe/eval.c
index 8dcf7809c9fc..8cb8c64221e0 100644
--- a/security/ipe/eval.c
+++ b/security/ipe/eval.c
@@ -10,6 +10,7 @@ 
 #include <linux/sched.h>
 #include <linux/rcupdate.h>
 #include <linux/moduleparam.h>
+#include <linux/fsverity.h>
 
 #include "ipe.h"
 #include "eval.h"
@@ -51,6 +52,23 @@  static void build_ipe_bdev_ctx(struct ipe_eval_ctx *ctx, const struct inode *con
 }
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
 
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+/**
+ * build_ipe_inode_ctx - Build inode fields of an evaluation context.
+ * @ctx: Supplies a pointer to the context to be populated.
+ * @ino: Supplies the inode struct of the file triggered IPE event.
+ */
+static void build_ipe_inode_ctx(struct ipe_eval_ctx *ctx, const struct inode *const ino)
+{
+	ctx->ino = ino;
+	ctx->ipe_inode = ipe_inode(ctx->ino);
+}
+#else
+static void build_ipe_inode_ctx(struct ipe_eval_ctx *ctx, const struct inode *const ino)
+{
+}
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
+
 /**
  * build_eval_ctx - Build an evaluation context.
  * @ctx: Supplies a pointer to the context to be populated.
@@ -63,13 +81,17 @@  void build_eval_ctx(struct ipe_eval_ctx *ctx,
 		    enum ipe_op_type op,
 		    enum ipe_hook_type hook)
 {
+	struct inode *ino;
+
 	ctx->file = file;
 	ctx->op = op;
 	ctx->hook = hook;
 
 	if (file) {
 		build_ipe_sb_ctx(ctx, file);
-		build_ipe_bdev_ctx(ctx, d_real_inode(file->f_path.dentry));
+		ino = d_real_inode(file->f_path.dentry);
+		build_ipe_bdev_ctx(ctx, ino);
+		build_ipe_inode_ctx(ctx, ino);
 	}
 }
 
@@ -148,6 +170,84 @@  static bool evaluate_dmv_sig_true(const struct ipe_eval_ctx *const ctx)
 }
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
 
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+/**
+ * evaluate_fsv_digest - Analyze @ctx against a fsv digest property.
+ * @ctx: Supplies a pointer to the context being evaluated.
+ * @p: Supplies a pointer to the property being evaluated.
+ *
+ * Return:
+ * * true	- The current @ctx match the @p
+ * * false	- The current @ctx doesn't match the @p
+ */
+static bool evaluate_fsv_digest(const struct ipe_eval_ctx *const ctx,
+				struct ipe_prop *p)
+{
+	enum hash_algo alg;
+	u8 digest[FS_VERITY_MAX_DIGEST_SIZE];
+	struct digest_info info;
+
+	if (!ctx->ino)
+		return false;
+	if (!fsverity_get_digest((struct inode *)ctx->ino,
+				 digest,
+				 NULL,
+				 &alg))
+		return false;
+
+	info.alg = hash_algo_name[alg];
+	info.digest = digest;
+	info.digest_len = hash_digest_size[alg];
+
+	return ipe_digest_eval(p->value, &info);
+}
+
+/**
+ * evaluate_fsv_sig_false - Analyze @ctx against a fsv sig false property.
+ * @ctx: Supplies a pointer to the context being evaluated.
+ *
+ * Return:
+ * * true	- The current @ctx match the property
+ * * false	- The current @ctx doesn't match the property
+ */
+static bool evaluate_fsv_sig_false(const struct ipe_eval_ctx *const ctx)
+{
+	return !ctx->ino ||
+	       !IS_VERITY(ctx->ino) ||
+	       !ctx->ipe_inode ||
+	       !ctx->ipe_inode->fs_verity_signed;
+}
+
+/**
+ * evaluate_fsv_sig_true - Analyze @ctx against a fsv sig true property.
+ * @ctx: Supplies a pointer to the context being evaluated.
+ *
+ * Return:
+ * * true - The current @ctx match the property
+ * * false - The current @ctx doesn't match the property
+ */
+static bool evaluate_fsv_sig_true(const struct ipe_eval_ctx *const ctx)
+{
+	return !evaluate_fsv_sig_false(ctx);
+}
+#else
+static bool evaluate_fsv_digest(const struct ipe_eval_ctx *const ctx,
+				struct ipe_prop *p)
+{
+	return false;
+}
+
+static bool evaluate_fsv_sig_false(const struct ipe_eval_ctx *const ctx)
+{
+	return false;
+}
+
+static bool evaluate_fsv_sig_true(const struct ipe_eval_ctx *const ctx)
+{
+	return false;
+}
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
+
 /**
  * evaluate_property - Analyze @ctx against a property.
  * @ctx: Supplies a pointer to the context to be evaluated.
@@ -171,6 +271,12 @@  static bool evaluate_property(const struct ipe_eval_ctx *const ctx,
 		return evaluate_dmv_sig_false(ctx);
 	case IPE_PROP_DMV_SIG_TRUE:
 		return evaluate_dmv_sig_true(ctx);
+	case IPE_PROP_FSV_DIGEST:
+		return evaluate_fsv_digest(ctx, p);
+	case IPE_PROP_FSV_SIG_FALSE:
+		return evaluate_fsv_sig_false(ctx);
+	case IPE_PROP_FSV_SIG_TRUE:
+		return evaluate_fsv_sig_true(ctx);
 	default:
 		return false;
 	}
diff --git a/security/ipe/eval.h b/security/ipe/eval.h
index 494c0754f512..73ac905dc97d 100644
--- a/security/ipe/eval.h
+++ b/security/ipe/eval.h
@@ -29,6 +29,12 @@  struct ipe_bdev {
 };
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
 
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+struct ipe_inode {
+	bool fs_verity_signed;
+};
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
+
 struct ipe_eval_ctx {
 	enum ipe_op_type op;
 	enum ipe_hook_type hook;
@@ -38,6 +44,10 @@  struct ipe_eval_ctx {
 #ifdef CONFIG_IPE_PROP_DM_VERITY
 	const struct ipe_bdev *ipe_bdev;
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+	const struct inode *ino;
+	const struct ipe_inode *ipe_inode;
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
 };
 
 enum ipe_match {
diff --git a/security/ipe/hooks.c b/security/ipe/hooks.c
index f5190a1347a6..ca1573ff21b7 100644
--- a/security/ipe/hooks.c
+++ b/security/ipe/hooks.c
@@ -254,3 +254,33 @@  int ipe_bdev_setsecurity(struct block_device *bdev, const char *key,
 	return -EOPNOTSUPP;
 }
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
+
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+/**
+ * ipe_inode_setsecurity - Sets fields of a inode security blob from @key.
+ * @inode: The inode to source the security blob from.
+ * @name: The name representing the information to be stored.
+ * @value: The value to be stored.
+ * @size: The size of @value.
+ * @flags: unused
+ *
+ * Saves fsverity signature & digest into inode security blob
+ *
+ * Return:
+ * * 0	- OK
+ * * !0	- Error
+ */
+int ipe_inode_setsecurity(struct inode *inode, const char *name,
+			  const void *value, size_t size,
+			  int flags)
+{
+	struct ipe_inode *inode_sec = ipe_inode(inode);
+
+	if (!strcmp(name, FS_VERITY_INODE_SEC_NAME)) {
+		inode_sec->fs_verity_signed = size > 0 && value;
+		return 0;
+	}
+
+	return -EOPNOTSUPP;
+}
+#endif /* CONFIG_CONFIG_IPE_PROP_FS_VERITY */
diff --git a/security/ipe/hooks.h b/security/ipe/hooks.h
index 26a58cbcc276..96a5295d8303 100644
--- a/security/ipe/hooks.h
+++ b/security/ipe/hooks.h
@@ -9,6 +9,7 @@ 
 #include <linux/binfmts.h>
 #include <linux/security.h>
 #include <linux/blk_types.h>
+#include <linux/fsverity.h>
 
 enum ipe_hook_type {
 	IPE_HOOK_BPRM_CHECK = 0,
@@ -43,4 +44,10 @@  int ipe_bdev_setsecurity(struct block_device *bdev, const char *key,
 			 const void *value, size_t len);
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
 
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+int ipe_inode_setsecurity(struct inode *inode, const char *name,
+			  const void *value, size_t size,
+			  int flags);
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
+
 #endif /* _IPE_HOOKS_H */
diff --git a/security/ipe/ipe.c b/security/ipe/ipe.c
index a62b9dc0c8f6..598333d3ef14 100644
--- a/security/ipe/ipe.c
+++ b/security/ipe/ipe.c
@@ -16,6 +16,9 @@  static struct lsm_blob_sizes ipe_blobs __ro_after_init = {
 #ifdef CONFIG_IPE_PROP_DM_VERITY
 	.lbs_bdev = sizeof(struct ipe_bdev),
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+	.lbs_inode = sizeof(struct ipe_inode),
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
 };
 
 static const struct lsm_id ipe_lsmid = {
@@ -35,6 +38,13 @@  struct ipe_bdev *ipe_bdev(struct block_device *b)
 }
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
 
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+struct ipe_inode *ipe_inode(const struct inode *inode)
+{
+	return inode->i_security + ipe_blobs.lbs_inode;
+}
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
+
 static struct security_hook_list ipe_hooks[] __ro_after_init = {
 	LSM_HOOK_INIT(bprm_check_security, ipe_bprm_check_security),
 	LSM_HOOK_INIT(mmap_file, ipe_mmap_file),
@@ -46,6 +56,9 @@  static struct security_hook_list ipe_hooks[] __ro_after_init = {
 	LSM_HOOK_INIT(bdev_free_security, ipe_bdev_free_security),
 	LSM_HOOK_INIT(bdev_setsecurity, ipe_bdev_setsecurity),
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+	LSM_HOOK_INIT(inode_setsecurity, ipe_inode_setsecurity),
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
 };
 
 /**
diff --git a/security/ipe/ipe.h b/security/ipe/ipe.h
index 64626702b689..57d3fc22fe10 100644
--- a/security/ipe/ipe.h
+++ b/security/ipe/ipe.h
@@ -19,5 +19,8 @@  extern bool ipe_enabled;
 #ifdef CONFIG_IPE_PROP_DM_VERITY
 struct ipe_bdev *ipe_bdev(struct block_device *b);
 #endif /* CONFIG_IPE_PROP_DM_VERITY */
+#ifdef CONFIG_IPE_PROP_FS_VERITY
+struct ipe_inode *ipe_inode(const struct inode *inode);
+#endif /* CONFIG_IPE_PROP_FS_VERITY */
 
 #endif /* _IPE_H */
diff --git a/security/ipe/policy.h b/security/ipe/policy.h
index 35629e9699f7..ae6264874fd3 100644
--- a/security/ipe/policy.h
+++ b/security/ipe/policy.h
@@ -36,6 +36,9 @@  enum ipe_prop_type {
 	IPE_PROP_DMV_ROOTHASH,
 	IPE_PROP_DMV_SIG_FALSE,
 	IPE_PROP_DMV_SIG_TRUE,
+	IPE_PROP_FSV_DIGEST,
+	IPE_PROP_FSV_SIG_FALSE,
+	IPE_PROP_FSV_SIG_TRUE,
 	__IPE_PROP_MAX
 };
 
diff --git a/security/ipe/policy_parser.c b/security/ipe/policy_parser.c
index 802e31f14b22..48dc11739072 100644
--- a/security/ipe/policy_parser.c
+++ b/security/ipe/policy_parser.c
@@ -273,6 +273,9 @@  static const match_table_t property_tokens = {
 	{IPE_PROP_DMV_ROOTHASH,		"dmverity_roothash=%s"},
 	{IPE_PROP_DMV_SIG_FALSE,	"dmverity_signature=FALSE"},
 	{IPE_PROP_DMV_SIG_TRUE,		"dmverity_signature=TRUE"},
+	{IPE_PROP_FSV_DIGEST,		"fsverity_digest=%s"},
+	{IPE_PROP_FSV_SIG_FALSE,	"fsverity_signature=FALSE"},
+	{IPE_PROP_FSV_SIG_TRUE,		"fsverity_signature=TRUE"},
 	{IPE_PROP_INVALID,		NULL}
 };
 
@@ -302,6 +305,7 @@  static int parse_property(char *t, struct ipe_rule *r)
 
 	switch (token) {
 	case IPE_PROP_DMV_ROOTHASH:
+	case IPE_PROP_FSV_DIGEST:
 		dup = match_strdup(&args[0]);
 		if (!dup) {
 			rc = -ENOMEM;
@@ -317,6 +321,8 @@  static int parse_property(char *t, struct ipe_rule *r)
 	case IPE_PROP_BOOT_VERIFIED_TRUE:
 	case IPE_PROP_DMV_SIG_FALSE:
 	case IPE_PROP_DMV_SIG_TRUE:
+	case IPE_PROP_FSV_SIG_FALSE:
+	case IPE_PROP_FSV_SIG_TRUE:
 		p->type = token;
 		break;
 	default: