[PATCH] ima: fix error handling logic when file measurement failed

[Matt Bobrowski <mattbobrowski@google.com>]

Restore the error handling logic so that when file measurement fails,
the respective iint entry is not left with the digest data being
populated with zeroes.

Fixes: 54f03916fb89 ("ima: permit fsverity's file digests in the IMA measurement list")
Signed-off-by: Matt Bobrowski <mattbobrowski@google.com>
---
 security/integrity/ima/ima_api.c  | 2 +-
 security/integrity/ima/ima_main.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index c1e76282b5ee..1e3a7a4f8833 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -292,7 +292,7 @@ int ima_collect_measurement(struct integrity_iint_cache *iint,
 		result = ima_calc_file_hash(file, &hash.hdr);
 	}
 
-	if (result == -ENOMEM)
+	if (result && result != -EBADF && result != -EINVAL)
 		goto out;
 
 	length = sizeof(hash.hdr) + hash.hdr.length;
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 377300973e6c..b1ae0f2751f1 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -337,7 +337,7 @@ static int process_measurement(struct file *file, const struct cred *cred,
 	hash_algo = ima_get_hash_algo(xattr_value, xattr_len);
 
 	rc = ima_collect_measurement(iint, file, buf, size, hash_algo, modsig);
-	if (rc == -ENOMEM)
+	if (rc != 0 && rc != -EBADF && rc != -EINVAL)
 		goto out_locked;
 
 	if (!pathbuf)	/* ima_rdwr_violation possibly pre-fetched */
-- 
2.39.0.314.g84b9a713c41-goog

/M