From 02a48caf7e1af1be417311498dd2f6c1de3883df Mon Sep 17 00:00:00 2001
From: Milan Broz <gmazyland@gmail.com>
Date: Thu, 15 May 2025 15:49:28 +0200
Subject: [PATCH] Print better error message for unsupported LUKS2 AEAD device
 resize.

Fixes: #804
---
 lib/setup.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/setup.c b/lib/setup.c
index d75f6b50..26277a6a 100644
--- a/lib/setup.c
+++ b/lib/setup.c
@@ -3709,6 +3709,11 @@ int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
 		return -EINVAL;
 	}
 
+	if (isLUKS2(cd->type) && crypt_get_integrity_tag_size(cd)) {
+		log_err(cd, _("Resize of LUKS2 device with integrity protection is not supported."));
+		return -ENOTSUP;
+	}
+
 	if (new_size)
 		log_dbg(cd, "Resizing device %s to %" PRIu64 " sectors.", name, new_size);
 	else