Re: [PATCH ima-evm-utils v2 10/12] Limit the file hash algorithm name length

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On 9/6/22 15:50, Mimi Zohar wrote:
Instead of assuming the file hash algorithm is a properly NULL terminated
string, properly limit the "algo:<hash>" field size.

Reviewed-by: Petr Vorel <pvorel@xxxxxxx>
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>


Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>

---
  src/evmctl.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/evmctl.c b/src/evmctl.c
index a497b1a468d6..aac669438a1c 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -1602,7 +1602,7 @@ void ima_ng_show(struct template_entry *entry)
  	total_len -= sizeof(field_len);
algo = (char *)fieldp;
-	len = strlen(algo) + 1;
+	len = strnlen(algo, field_len - 1) + 1;
  	digest_len = field_len - len;
  	digest = fieldp + len;



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