File mkfs.ocfs2-verify-the-number-of-clusters.patch of Package ocfs2-tools

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File mkfs.ocfs2-verify-the-number-of-clusters.patch of Package ocfs2-tools (Revision 2ecaa389266ef189324e31476b60c075)

Currently displaying revision 2ecaa389266ef189324e31476b60c075 , Show latest

From f8269ca8d87f908cfcaa538c6d014b9dd9617171 Mon Sep 17 00:00:00 2001
From: Rui Jia <jindui71@gmail.com>
Date: Thu, 26 Oct 2023 00:35:18 +0800
Subject: [PATCH 1/2] mkfs.ocfs2: verify the number of clusters

When the calculated number of clusters exceeds UINT32_MAX,
the result of mkfs.ocfs2 will be incorrect. Therefore, it
is necessary to verify the calculated number of clusters,
if it exceeds UINT32_ MAX outputs an error message and
exits the program.

Signed-off-by: Rui Jia <jindui71@gmail.com>
---
 mkfs.ocfs2/mkfs.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/mkfs.ocfs2/mkfs.c b/mkfs.ocfs2/mkfs.c
index 932b9058d5ac..69af2bf00459 100644
--- a/mkfs.ocfs2/mkfs.c
+++ b/mkfs.ocfs2/mkfs.c
@@ -1689,7 +1689,7 @@ fill_defaults(State *s)
 	int sectsize;
 	uint64_t ret;
 	struct ocfs2_cluster_group_sizes cgs;
-	uint64_t tmp;
+	uint64_t volume_size_in_clusters_tmp;
 
 	pagesize = getpagesize();
 
@@ -1827,10 +1827,19 @@ fill_defaults(State *s)
 
 	s->cluster_size_bits = get_bits(s, s->cluster_size);
 
+	/* volume size in clusters must not exceed UINT32_MAX */
+	volume_size_in_clusters_tmp = s->volume_size_in_bytes >> s->cluster_size_bits;
+	if (volume_size_in_clusters_tmp > UINT32_MAX) {
+		com_err(s->progname, 0,
+			"The ocfs2 filesystem on device \"%s\" cannot be "
+			"larger than %"PRIu32" clusters\n",
+			s->device_name, UINT32_MAX);
+		exit(1);
+	}
+
 	/* volume size needs to be cluster aligned */
-	s->volume_size_in_clusters = s->volume_size_in_bytes >> s->cluster_size_bits;
-	tmp = (uint64_t)s->volume_size_in_clusters;
-	s->volume_size_in_bytes = tmp << s->cluster_size_bits;
+	s->volume_size_in_clusters = volume_size_in_clusters_tmp;
+	s->volume_size_in_bytes = volume_size_in_clusters_tmp << s->cluster_size_bits;
 	s->volume_size_in_blocks = s->volume_size_in_bytes >> s->blocksize_bits;
 	
 	s->reserved_tail_size = 0;
-- 
2.35.3

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File mkfs.ocfs2-verify-the-number-of-clusters.patch of Package ocfs2-tools (Revision 2ecaa389266ef189324e31476b60c075)

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