diff mbox series

[v3] fs: add the tuncate check of exfat

Message ID 20230316144517.7355-1-congmingyi@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v3] fs: add the tuncate check of exfat | expand

Commit Message

Mingyi Cong March 16, 2023, 2:45 p.m. UTC
EXFAT will fill zero data in truncated range.
Fix this by adding EXFAT_SUPER_MAGIC check.

Signed-off-by: MIngyi Cong <congmingyi@gmail.com>
---
 V1 -> V2: add the truncate check of hfs and remove EXFAT_SUPER_MAGIC in magic.h
 V2 -> V3: remove the truncate check of hfs and hfsplus
 fs/ksmbd/smb2pdu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 0685c1c77b9f..3f2e34936b8d 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -5746,7 +5746,8 @@  static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
 	 * truncate of some filesystem like FAT32 fill zero data in
 	 * truncated range.
 	 */
-	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
+	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC ||
+		inode->i_sb->s_magic != EXFAT_SUPER_MAGIC) {
 		ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
 		rc = ksmbd_vfs_truncate(work, fp, newsize);
 		if (rc) {