From: Tobias Stoeckmann <tobias@stoeckmann.org>
Date: Sat, 18 Apr 2026 15:21:48 +0000 (+0200)
Subject: mkfs.cramfs: Improve file size check
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=9f14002af76ce24baf43d71ff642fda37271940e;p=thirdparty%2Futil-linux.git

mkfs.cramfs: Improve file size check

Check st.st_size (off_t) for actual file size instead of the possibly
already truncated entry->size (unsigned int) value. Otherwise files
larger than 4 GB might be silently truncated.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
---

diff --git a/disk-utils/mkfs.cramfs.c b/disk-utils/mkfs.cramfs.c
index 2d57900b7..13c93e3a4 100644
--- a/disk-utils/mkfs.cramfs.c
+++ b/disk-utils/mkfs.cramfs.c
@@ -363,7 +363,7 @@ static unsigned int parse_directory(struct entry *root_entry, const char *name,
 			entry->size = parse_directory(root_entry, path, &entry->child, fslen_ub);
 		} else if (S_ISREG(st.st_mode)) {
 			entry->path = xstrdup(path);
-			if (entry->size >= (1 << CRAMFS_SIZE_WIDTH)) {
+			if (st.st_size >= (1 << CRAMFS_SIZE_WIDTH)) {
 				warn_size = 1;
 				entry->size = (1 << CRAMFS_SIZE_WIDTH) - 1;
 			}