From: Namjae Jeon linkinjeon@kernel.org
[ Upstream commit 04e260948a160d3b7d622bf4c8a96fa4577c09bd ]
When checking smb2 query directory packets from other servers, OutputBufferLength is different with ksmbd. Other servers add an unaligned next offset to OutputBufferLength for the last entry.
Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ksmbd/smb2pdu.c | 7 ++++--- fs/ksmbd/vfs.h | 1 + 2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 1ff1e52f398fc..cbbbccdc5a0a5 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -3423,9 +3423,9 @@ static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, goto free_conv_name; }
- struct_sz = readdir_info_level_struct_sz(info_level); - next_entry_offset = ALIGN(struct_sz - 1 + conv_len, - KSMBD_DIR_INFO_ALIGNMENT); + struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len; + next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); + d_info->last_entry_off_align = next_entry_offset - struct_sz;
if (next_entry_offset > d_info->out_buf_len) { d_info->out_buf_len = 0; @@ -3977,6 +3977,7 @@ int smb2_query_dir(struct ksmbd_work *work) ((struct file_directory_info *) ((char *)rsp->Buffer + d_info.last_entry_offset)) ->NextEntryOffset = 0; + d_info.data_count -= d_info.last_entry_off_align;
rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(72); diff --git a/fs/ksmbd/vfs.h b/fs/ksmbd/vfs.h index adf94a4f22fa6..8c37aaf936ab1 100644 --- a/fs/ksmbd/vfs.h +++ b/fs/ksmbd/vfs.h @@ -47,6 +47,7 @@ struct ksmbd_dir_info { int last_entry_offset; bool hide_dot_file; int flags; + int last_entry_off_align; };
struct ksmbd_readdir_data {