From: Pumpkin <cc85nod@xxxxxxxxx> ksmbd_smb2_check_message allows client to return one byte more, so we need to allocate additional memory in ksmbd_conn_handler_loop to avoid out-of-bound access. Signed-off-by: Pumpkin <cc85nod@xxxxxxxxx> Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx> --- fs/ksmbd/connection.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ksmbd/connection.c b/fs/ksmbd/connection.c index 4ed379f9b1aa..4882a812ea86 100644 --- a/fs/ksmbd/connection.c +++ b/fs/ksmbd/connection.c @@ -351,7 +351,8 @@ int ksmbd_conn_handler_loop(void *p) break; /* 4 for rfc1002 length field */ - size = pdu_size + 4; + /* 1 for implied bcc[0] */ + size = pdu_size + 4 + 1; conn->request_buf = kvmalloc(size, GFP_KERNEL); if (!conn->request_buf) break; -- 2.25.1
