exfat: preserve benign secondary entries during rename and move

Commit 8258ef28001a ("exfat: handle unreconized benign secondary
entries") added cluster freeing for benign secondary entries inside
exfat_remove_entries().  However, exfat_remove_entries() is also called
from the rename and move paths (exfat_rename_file and exfat_move_file),
where the old entry set is being relocated rather than deleted.  This
causes benign secondary entries such as vendor extension entries to be
silently destroyed on rename or cross-directory move, violating the
exFAT spec requirement (section 8.2) that implementations preserve
unrecognized benign secondary entries.

Fix this by adding a free_benign parameter to exfat_remove_entries()
so callers can suppress cluster freeing during relocation, and
extending exfat_init_ext_entry() to copy trailing benign secondary
entries from the old entry set into the new one internally.  Also
clean up the error paths to delete newly allocated entries on failure.

Fixes: 8258ef28001a ("exfat: handle unreconized benign secondary entries")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-fsdevel/CAG7tbBV--waov7XVu2FHQEc6paR92dufS=em9DW5Kzsrpu3iQg@mail.gmail.com/
Signed-off-by: Rochan Avlur <rochan.avlur@gmail.com>
Reviewed-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions