The FAT specification [1] requires that for a '..' directory entry pointing
to the root directory the fields DIR_FstClusHi and DIR_FstClusLo are 0.
[1] Microsoft FAT Specification, Microsoft Corporation, August 30 2005
Fixes: 31a18d570d96 ("fs: fat: support mkdir")
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
Acked-by: Marek Szyprowski <m.szyprow...@samsung.com>
---
fs/fat/fat_write.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index 7afc8388b2..4da342f9c9 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -1468,7 +1468,11 @@ int fat_mkdir(const char *new_dirname)
memcpy(dotdent[1].name, ".. ", 8);
memcpy(dotdent[1].ext, " ", 3);
dotdent[1].attr = ATTR_DIR | ATTR_ARCH;
- set_start_cluster(mydata, &dotdent[1], itr->start_clust);
+
+ if (itr->is_root)
+ set_start_cluster(mydata, &dotdent[1], 0);
+ else
+ set_start_cluster(mydata, &dotdent[1], itr->start_clust);
ret = set_contents(mydata, retdent, 0, (__u8 *)dotdent,
bytesperclust, &actwrite);
--
2.29.2
