Commit dc318846 authored by Namjae Jeon's avatar Namjae Jeon Committed by Steve French
Browse files

ksmbd: fix out of bounds in smb3_decrypt_req() 



smb3_decrypt_req() validate if pdu_length is smaller than
smb2_transform_hdr size.

Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21589
Signed-off-by: default avatarNamjae Jeon <linkinjeon@kernel.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 2b57a432

fs/smb/server/smb2pdu.c

+2 −1
Original line number Diff line number Diff line
@@ -8614,7 +8614,8 @@ int smb3_decrypt_req(struct ksmbd_work *work) 
	struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);

	int rc = 0;



	if (buf_data_size < sizeof(struct smb2_hdr)) {

	if (pdu_length < sizeof(struct smb2_transform_hdr) ||

	    buf_data_size < sizeof(struct smb2_hdr)) {

		pr_err("Transform message is too small (%u)\n",

		       pdu_length);

		return -ECONNABORTED;