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.glpk@gmx.de Acked-by: Marek Szyprowski m.szyprowski@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