git: 0011a183ccd1 - stable/14 - MFC: fsck_msdosfs: fix 32-bit overflow computing the LOST.DIR offset
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Date: Thu, 10 Sep 2026 02:32:12 UTC
The branch stable/14 has been updated by delphij:
URL: https://cgit.FreeBSD.org/src/commit/?id=0011a183ccd16fa315e4cf4c1f9650f81c6c9740
commit 0011a183ccd16fa315e4cf4c1f9650f81c6c9740
Author: CooperCao <caopeng89@foxmail.com>
AuthorDate: 2026-09-03 07:10:12 +0000
Commit: Xin LI <delphij@FreeBSD.org>
CommitDate: 2026-09-10 02:31:07 +0000
MFC: fsck_msdosfs: fix 32-bit overflow computing the LOST.DIR offset
(cherry picked from commit d3c5464fee7b178a39c189363e48806a11fd3da4)
---
sbin/fsck_msdosfs/dir.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sbin/fsck_msdosfs/dir.c b/sbin/fsck_msdosfs/dir.c
index 2d7e4bcdc38f..e24824261a9f 100644
--- a/sbin/fsck_msdosfs/dir.c
+++ b/sbin/fsck_msdosfs/dir.c
@@ -1129,8 +1129,8 @@ reconnect(struct fat_descriptor *fat, cl_t head, size_t length)
lfcl = (lostDir->head < boot->NumClusters) ? lostDir->head : 0;
return FSERROR;
}
- lfoff = (lfcl - CLUST_FIRST) * boot->ClusterSize
- + boot->FirstCluster * boot->bpbBytesPerSec;
+ lfoff = (off_t)(lfcl - CLUST_FIRST) * boot->ClusterSize +
+ (off_t)boot->FirstCluster * boot->bpbBytesPerSec;
if (lseek(dosfs, lfoff, SEEK_SET) != lfoff
|| (size_t)read(dosfs, lfbuf, boot->ClusterSize) != boot->ClusterSize) {