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-rw-r--r--fs/ksmbd/auth.c16
-rw-r--r--fs/ksmbd/connection.c2
-rw-r--r--fs/ksmbd/ksmbd_netlink.h2
-rw-r--r--fs/ksmbd/mgmt/user_config.c2
-rw-r--r--fs/ksmbd/mgmt/user_config.h1
-rw-r--r--fs/ksmbd/smb2misc.c55
-rw-r--r--fs/ksmbd/smb2ops.c3
-rw-r--r--fs/ksmbd/smb2pdu.c346
-rw-r--r--fs/ksmbd/smb2pdu.h2
-rw-r--r--fs/ksmbd/transport_ipc.c3
-rw-r--r--fs/ksmbd/transport_ipc.h2
-rw-r--r--fs/ksmbd/transport_rdma.c21
-rw-r--r--fs/ksmbd/vfs.c2
-rw-r--r--fs/ksmbd/vfs.h2
14 files changed, 306 insertions, 153 deletions
diff --git a/fs/ksmbd/auth.c b/fs/ksmbd/auth.c
index 71c989f1568d..30a92ddc1817 100644
--- a/fs/ksmbd/auth.c
+++ b/fs/ksmbd/auth.c
@@ -298,8 +298,8 @@ int ksmbd_decode_ntlmssp_auth_blob(struct authenticate_message *authblob,
int blob_len, struct ksmbd_session *sess)
{
char *domain_name;
- unsigned int lm_off, nt_off;
- unsigned short nt_len;
+ unsigned int nt_off, dn_off;
+ unsigned short nt_len, dn_len;
int ret;
if (blob_len < sizeof(struct authenticate_message)) {
@@ -314,15 +314,17 @@ int ksmbd_decode_ntlmssp_auth_blob(struct authenticate_message *authblob,
return -EINVAL;
}
- lm_off = le32_to_cpu(authblob->LmChallengeResponse.BufferOffset);
nt_off = le32_to_cpu(authblob->NtChallengeResponse.BufferOffset);
nt_len = le16_to_cpu(authblob->NtChallengeResponse.Length);
+ dn_off = le32_to_cpu(authblob->DomainName.BufferOffset);
+ dn_len = le16_to_cpu(authblob->DomainName.Length);
+
+ if (blob_len < (u64)dn_off + dn_len || blob_len < (u64)nt_off + nt_len)
+ return -EINVAL;
/* TODO : use domain name that imported from configuration file */
- domain_name = smb_strndup_from_utf16((const char *)authblob +
- le32_to_cpu(authblob->DomainName.BufferOffset),
- le16_to_cpu(authblob->DomainName.Length), true,
- sess->conn->local_nls);
+ domain_name = smb_strndup_from_utf16((const char *)authblob + dn_off,
+ dn_len, true, sess->conn->local_nls);
if (IS_ERR(domain_name))
return PTR_ERR(domain_name);
diff --git a/fs/ksmbd/connection.c b/fs/ksmbd/connection.c
index 48b18b4ec117..b57a0d8a392f 100644
--- a/fs/ksmbd/connection.c
+++ b/fs/ksmbd/connection.c
@@ -61,6 +61,8 @@ struct ksmbd_conn *ksmbd_conn_alloc(void)
conn->local_nls = load_nls_default();
atomic_set(&conn->req_running, 0);
atomic_set(&conn->r_count, 0);
+ conn->total_credits = 1;
+
init_waitqueue_head(&conn->req_running_q);
INIT_LIST_HEAD(&conn->conns_list);
INIT_LIST_HEAD(&conn->sessions);
diff --git a/fs/ksmbd/ksmbd_netlink.h b/fs/ksmbd/ksmbd_netlink.h
index 2fbe2bc1e093..c6718a05d347 100644
--- a/fs/ksmbd/ksmbd_netlink.h
+++ b/fs/ksmbd/ksmbd_netlink.h
@@ -211,6 +211,7 @@ struct ksmbd_tree_disconnect_request {
*/
struct ksmbd_logout_request {
__s8 account[KSMBD_REQ_MAX_ACCOUNT_NAME_SZ]; /* user account name */
+ __u32 account_flags;
};
/*
@@ -317,6 +318,7 @@ enum KSMBD_TREE_CONN_STATUS {
#define KSMBD_USER_FLAG_BAD_UID BIT(2)
#define KSMBD_USER_FLAG_BAD_USER BIT(3)
#define KSMBD_USER_FLAG_GUEST_ACCOUNT BIT(4)
+#define KSMBD_USER_FLAG_DELAY_SESSION BIT(5)
/*
* Share config flags.
diff --git a/fs/ksmbd/mgmt/user_config.c b/fs/ksmbd/mgmt/user_config.c
index d21629ae5c89..1019d3677d55 100644
--- a/fs/ksmbd/mgmt/user_config.c
+++ b/fs/ksmbd/mgmt/user_config.c
@@ -55,7 +55,7 @@ struct ksmbd_user *ksmbd_alloc_user(struct ksmbd_login_response *resp)
void ksmbd_free_user(struct ksmbd_user *user)
{
- ksmbd_ipc_logout_request(user->name);
+ ksmbd_ipc_logout_request(user->name, user->flags);
kfree(user->name);
kfree(user->passkey);
kfree(user);
diff --git a/fs/ksmbd/mgmt/user_config.h b/fs/ksmbd/mgmt/user_config.h
index b2bb074a0150..aff80b029579 100644
--- a/fs/ksmbd/mgmt/user_config.h
+++ b/fs/ksmbd/mgmt/user_config.h
@@ -18,6 +18,7 @@ struct ksmbd_user {
size_t passkey_sz;
char *passkey;
+ unsigned int failed_login_count;
};
static inline bool user_guest(struct ksmbd_user *user)
diff --git a/fs/ksmbd/smb2misc.c b/fs/ksmbd/smb2misc.c
index 9edd9c161b27..030ca57c3784 100644
--- a/fs/ksmbd/smb2misc.c
+++ b/fs/ksmbd/smb2misc.c
@@ -284,11 +284,13 @@ static inline int smb2_ioctl_resp_len(struct smb2_ioctl_req *h)
le32_to_cpu(h->MaxOutputResponse);
}
-static int smb2_validate_credit_charge(struct smb2_hdr *hdr)
+static int smb2_validate_credit_charge(struct ksmbd_conn *conn,
+ struct smb2_hdr *hdr)
{
- int req_len = 0, expect_resp_len = 0, calc_credit_num, max_len;
- int credit_charge = le16_to_cpu(hdr->CreditCharge);
+ unsigned int req_len = 0, expect_resp_len = 0, calc_credit_num, max_len;
+ unsigned short credit_charge = le16_to_cpu(hdr->CreditCharge);
void *__hdr = hdr;
+ int ret;
switch (hdr->Command) {
case SMB2_QUERY_INFO:
@@ -310,21 +312,37 @@ static int smb2_validate_credit_charge(struct smb2_hdr *hdr)
req_len = smb2_ioctl_req_len(__hdr);
expect_resp_len = smb2_ioctl_resp_len(__hdr);
break;
- default:
+ case SMB2_CANCEL:
return 0;
+ default:
+ req_len = 1;
+ break;
}
- credit_charge = max(1, credit_charge);
- max_len = max(req_len, expect_resp_len);
+ credit_charge = max_t(unsigned short, credit_charge, 1);
+ max_len = max_t(unsigned int, req_len, expect_resp_len);
calc_credit_num = DIV_ROUND_UP(max_len, SMB2_MAX_BUFFER_SIZE);
if (credit_charge < calc_credit_num) {
- pr_err("Insufficient credit charge, given: %d, needed: %d\n",
- credit_charge, calc_credit_num);
+ ksmbd_debug(SMB, "Insufficient credit charge, given: %d, needed: %d\n",
+ credit_charge, calc_credit_num);
+ return 1;
+ } else if (credit_charge > conn->max_credits) {
+ ksmbd_debug(SMB, "Too large credit charge: %d\n", credit_charge);
return 1;
}
- return 0;
+ spin_lock(&conn->credits_lock);
+ if (credit_charge <= conn->total_credits) {
+ conn->total_credits -= credit_charge;
+ ret = 0;
+ } else {
+ ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
+ credit_charge, conn->total_credits);
+ ret = 1;
+ }
+ spin_unlock(&conn->credits_lock);
+ return ret;
}
int ksmbd_smb2_check_message(struct ksmbd_work *work)
@@ -382,26 +400,20 @@ int ksmbd_smb2_check_message(struct ksmbd_work *work)
}
}
- if ((work->conn->vals->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU) &&
- smb2_validate_credit_charge(hdr)) {
- work->conn->ops->set_rsp_status(work, STATUS_INVALID_PARAMETER);
- return 1;
- }
-
if (smb2_calc_size(hdr, &clc_len))
return 1;
if (len != clc_len) {
/* client can return one byte more due to implied bcc[0] */
if (clc_len == len + 1)
- return 0;
+ goto validate_credit;
/*
* Some windows servers (win2016) will pad also the final
* PDU in a compound to 8 bytes.
*/
if (ALIGN(clc_len, 8) == len)
- return 0;
+ goto validate_credit;
/*
* windows client also pad up to 8 bytes when compounding.
@@ -414,7 +426,7 @@ int ksmbd_smb2_check_message(struct ksmbd_work *work)
"cli req padded more than expected. Length %d not %d for cmd:%d mid:%llu\n",
len, clc_len, command,
le64_to_cpu(hdr->MessageId));
- return 0;
+ goto validate_credit;
}
ksmbd_debug(SMB,
@@ -425,6 +437,13 @@ int ksmbd_smb2_check_message(struct ksmbd_work *work)
return 1;
}
+validate_credit:
+ if ((work->conn->vals->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU) &&
+ smb2_validate_credit_charge(work->conn, hdr)) {
+ work->conn->ops->set_rsp_status(work, STATUS_INVALID_PARAMETER);
+ return 1;
+ }
+
return 0;
}
diff --git a/fs/ksmbd/smb2ops.c b/fs/ksmbd/smb2ops.c
index b06456eb587b..fb6a65d23139 100644
--- a/fs/ksmbd/smb2ops.c
+++ b/fs/ksmbd/smb2ops.c
@@ -284,6 +284,7 @@ int init_smb3_11_server(struct ksmbd_conn *conn)
void init_smb2_max_read_size(unsigned int sz)
{
+ sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
smb21_server_values.max_read_size = sz;
smb30_server_values.max_read_size = sz;
smb302_server_values.max_read_size = sz;
@@ -292,6 +293,7 @@ void init_smb2_max_read_size(unsigned int sz)
void init_smb2_max_write_size(unsigned int sz)
{
+ sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
smb21_server_values.max_write_size = sz;
smb30_server_values.max_write_size = sz;
smb302_server_values.max_write_size = sz;
@@ -300,6 +302,7 @@ void init_smb2_max_write_size(unsigned int sz)
void init_smb2_max_trans_size(unsigned int sz)
{
+ sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
smb21_server_values.max_trans_size = sz;
smb30_server_values.max_trans_size = sz;
smb302_server_values.max_trans_size = sz;
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 005aa93a49d6..7e448df3f847 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -292,22 +292,6 @@ int init_smb2_neg_rsp(struct ksmbd_work *work)
return 0;
}
-static int smb2_consume_credit_charge(struct ksmbd_work *work,
- unsigned short credit_charge)
-{
- struct ksmbd_conn *conn = work->conn;
- unsigned int rsp_credits = 1;
-
- if (!conn->total_credits)
- return 0;
-
- if (credit_charge > 0)
- rsp_credits = credit_charge;
-
- conn->total_credits -= rsp_credits;
- return rsp_credits;
-}
-
/**
* smb2_set_rsp_credits() - set number of credits in response buffer
* @work: smb work containing smb response buffer
@@ -317,49 +301,43 @@ int smb2_set_rsp_credits(struct ksmbd_work *work)
struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
struct ksmbd_conn *conn = work->conn;
- unsigned short credits_requested = le16_to_cpu(req_hdr->CreditRequest);
- unsigned short credit_charge = 1, credits_granted = 0;
- unsigned short aux_max, aux_credits, min_credits;
- int rsp_credit_charge;
+ unsigned short credits_requested;
+ unsigned short credit_charge, credits_granted = 0;
+ unsigned short aux_max, aux_credits;
- if (hdr->Command == SMB2_CANCEL)
- goto out;
+ if (work->send_no_response)
+ return 0;
- /* get default minimum credits by shifting maximum credits by 4 */
- min_credits = conn->max_credits >> 4;
+ hdr->CreditCharge = req_hdr->CreditCharge;
- if (conn->total_credits >= conn->max_credits) {
+ if (conn->total_credits > conn->max_credits) {
+ hdr->CreditRequest = 0;
pr_err("Total credits overflow: %d\n", conn->total_credits);
- conn->total_credits = min_credits;
- }
-
- rsp_credit_charge =
- smb2_consume_credit_charge(work, le16_to_cpu(req_hdr->CreditCharge));
- if (rsp_credit_charge < 0)
return -EINVAL;
+ }
- hdr->CreditCharge = cpu_to_le16(rsp_credit_charge);
+ credit_charge = max_t(unsigned short,
+ le16_to_cpu(req_hdr->CreditCharge), 1);
+ credits_requested = max_t(unsigned short,
+ le16_to_cpu(req_hdr->CreditRequest), 1);
- if (credits_requested > 0) {
- aux_credits = credits_requested - 1;
- aux_max = 32;
- if (hdr->Command == SMB2_NEGOTIATE)
- aux_max = 0;
- aux_credits = (aux_credits < aux_max) ? aux_credits : aux_max;
- credits_granted = aux_credits + credit_charge;
+ /* according to smb2.credits smbtorture, Windows server
+ * 2016 or later grant up to 8192 credits at once.
+ *
+ * TODO: Need to adjuct CreditRequest value according to
+ * current cpu load
+ */
+ aux_credits = credits_requested - 1;
+ if (hdr->Command == SMB2_NEGOTIATE)
+ aux_max = 0;
+ else
+ aux_max = conn->max_credits - credit_charge;
+ aux_credits = min_t(unsigned short, aux_credits, aux_max);
+ credits_granted = credit_charge + aux_credits;
- /* if credits granted per client is getting bigger than default
- * minimum credits then we should wrap it up within the limits.
- */
- if ((conn->total_credits + credits_granted) > min_credits)
- credits_granted = min_credits - conn->total_credits;
- /*
- * TODO: Need to adjuct CreditRequest value according to
- * current cpu load
- */
- } else if (conn->total_credits == 0) {
- credits_granted = 1;
- }
+ if (conn->max_credits - conn->total_credits < credits_granted)
+ credits_granted = conn->max_credits -
+ conn->total_credits;
conn->total_credits += credits_granted;
work->credits_granted += credits_granted;
@@ -368,7 +346,6 @@ int smb2_set_rsp_credits(struct ksmbd_work *work)
/* Update CreditRequest in last request */
hdr->CreditRequest = cpu_to_le16(work->credits_granted);
}
-out:
ksmbd_debug(SMB,
"credits: requested[%d] granted[%d] total_granted[%d]\n",
credits_requested, credits_granted,
@@ -472,6 +449,12 @@ bool is_chained_smb2_message(struct ksmbd_work *work)
return false;
}
+ if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
+ work->response_sz) {
+ pr_err("next response offset exceeds response buffer size\n");
+ return false;
+ }
+
ksmbd_debug(SMB, "got SMB2 chained command\n");
init_chained_smb2_rsp(work);
return true;
@@ -541,7 +524,7 @@ int smb2_allocate_rsp_buf(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = work->request_buf;
size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
- size_t large_sz = work->conn->vals->max_trans_size + MAX_SMB2_HDR_SIZE;
+ size_t large_sz = small_sz + work->conn->vals->max_trans_size;
size_t sz = small_sz;
int cmd = le16_to_cpu(hdr->Command);
@@ -1274,19 +1257,13 @@ static int generate_preauth_hash(struct ksmbd_work *work)
return 0;
}
-static int decode_negotiation_token(struct ksmbd_work *work,
- struct negotiate_message *negblob)
+static int decode_negotiation_token(struct ksmbd_conn *conn,
+ struct negotiate_message *negblob,
+ size_t sz)
{
- struct ksmbd_conn *conn = work->conn;
- struct smb2_sess_setup_req *req;
- int sz;
-
if (!conn->use_spnego)
return -EINVAL;
- req = work->request_buf;
- sz = le16_to_cpu(req->SecurityBufferLength);
-
if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
@@ -1298,9 +1275,9 @@ static int decode_negotiation_token(struct ksmbd_work *work,
}
static int ntlm_negotiate(struct ksmbd_work *work,
- struct negotiate_message *negblob)
+ struct negotiate_message *negblob,
+ size_t negblob_len)
{
- struct smb2_sess_setup_req *req = work->request_buf;
struct smb2_sess_setup_rsp *rsp = work->response_buf;
struct challenge_message *chgblob;
unsigned char *spnego_blob = NULL;
@@ -1309,8 +1286,7 @@ static int ntlm_negotiate(struct ksmbd_work *work,
int sz, rc;
ksmbd_debug(SMB, "negotiate phase\n");
- sz = le16_to_cpu(req->SecurityBufferLength);
- rc = ksmbd_decode_ntlmssp_neg_blob(negblob, sz, work->sess);
+ rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->sess);
if (rc)
return rc;
@@ -1378,12 +1354,23 @@ static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
struct authenticate_message *authblob;
struct ksmbd_user *user;
char *name;
- int sz;
+ unsigned int auth_msg_len, name_off, name_len, secbuf_len;
+ secbuf_len = le16_to_cpu(req->SecurityBufferLength);
+ if (secbuf_len < sizeof(struct authenticate_message)) {
+ ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
+ return NULL;
+ }
authblob = user_authblob(conn, req);
- sz = le32_to_cpu(authblob->UserName.BufferOffset);
- name = smb_strndup_from_utf16((const char *)authblob + sz,
- le16_to_cpu(authblob->UserName.Length),
+ name_off = le32_to_cpu(authblob->UserName.BufferOffset);
+ name_len = le16_to_cpu(authblob->UserName.Length);
+ auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
+
+ if (auth_msg_len < (u64)name_off + name_len)
+ return NULL;
+
+ name = smb_strndup_from_utf16((const char *)authblob + name_off,
+ name_len,
true,
conn->local_nls);
if (IS_ERR(name)) {
@@ -1629,6 +1616,7 @@ int smb2_sess_setup(struct ksmbd_work *work)
struct smb2_sess_setup_rsp *rsp = work->response_buf;
struct ksmbd_session *sess;
struct negotiate_message *negblob;
+ unsigned int negblob_len, negblob_off;
int rc = 0;
ksmbd_debug(SMB, "Received request for session setup\n");
@@ -1709,10 +1697,16 @@ int smb2_sess_setup(struct ksmbd_work *work)
if (sess->state == SMB2_SESSION_EXPIRED)
sess->state = SMB2_SESSION_IN_PROGRESS;
+ negblob_off = le16_to_cpu(req->SecurityBufferOffset);
+ negblob_len = le16_to_cpu(req->SecurityBufferLength);
+ if (negblob_off < (offsetof(struct smb2_sess_setup_req, Buffer) - 4) ||
+ negblob_len < offsetof(struct negotiate_message, NegotiateFlags))
+ return -EINVAL;
+
negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
- le16_to_cpu(req->SecurityBufferOffset));
+ negblob_off);
- if (decode_negotiation_token(work, negblob) == 0) {
+ if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
if (conn->mechToken)
negblob = (struct negotiate_message *)conn->mechToken;
}
@@ -1736,7 +1730,7 @@ int smb2_sess_setup(struct ksmbd_work *work)
sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
if (negblob->MessageType == NtLmNegotiate) {
- rc = ntlm_negotiate(work, negblob);
+ rc = ntlm_negotiate(work, negblob, negblob_len);
if (rc)
goto out_err;
rsp->hdr.Status =
@@ -1796,9 +1790,30 @@ out_err:
conn->mechToken = NULL;
}
- if (rc < 0 && sess) {
- ksmbd_session_destroy(sess);
- work->sess = NULL;
+ if (rc < 0) {
+ /*
+ * SecurityBufferOffset should be set to zero
+ * in session setup error response.
+ */
+ rsp->SecurityBufferOffset = 0;
+
+ if (sess) {
+ bool try_delay = false;
+
+ /*
+ * To avoid dictionary attacks (repeated session setups rapidly sent) to
+ * connect to server, ksmbd make a delay of a 5 seconds on session setup
+ * failure to make it harder to send enough random connection requests
+ * to break into a server.
+ */
+ if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
+ try_delay = true;
+
+ ksmbd_session_destroy(sess);
+ work->sess = NULL;
+ if (try_delay)
+ ssleep(5);
+ }
}
return rc;
@@ -3779,6 +3794,24 @@ static int verify_info_level(int info_level)
return 0;
}
+static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
+ unsigned short hdr2_len,
+ unsigned int out_buf_len)
+{
+ int free_len;
+
+ if (out_buf_len > work->conn->vals->max_trans_size)
+ return -EINVAL;
+
+ free_len = (int)(work->response_sz -
+ (get_rfc1002_len(work->response_buf) + 4)) -
+ hdr2_len;
+ if (free_len < 0)
+ return -EINVAL;
+
+ return min_t(int, out_buf_len, free_len);
+}
+
int smb2_query_dir(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
@@ -3855,9 +3888,13 @@ int smb2_query_dir(struct ksmbd_work *work)
memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
d_info.wptr = (char *)rsp->Buffer;
d_info.rptr = (char *)rsp->Buffer;
- d_info.out_buf_len = (work->response_sz - (get_rfc1002_len(rsp_org) + 4));
- d_info.out_buf_len = min_t(int, d_info.out_buf_len, le32_to_cpu(req->OutputBufferLength)) -
- sizeof(struct smb2_query_directory_rsp);
+ d_info.out_buf_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (d_info.out_buf_len < 0) {
+ rc = -EINVAL;
+ goto err_out;
+ }
d_info.flags = srch_flag;
/*
@@ -4091,12 +4128,11 @@ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
le32_to_cpu(req->Flags));
}
- buf_free_len = work->response_sz -
- (get_rfc1002_len(rsp_org) + 4) -
- sizeof(struct smb2_query_info_rsp);
-
- if (le32_to_cpu(req->OutputBufferLength) < buf_free_len)
- buf_free_len = le32_to_cpu(req->OutputBufferLength);
+ buf_free_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (buf_free_len < 0)
+ return -EINVAL;
rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (rc < 0) {
@@ -4407,6 +4443,8 @@ static void get_file_stream_info(struct ksmbd_work *work,
struct path *path = &fp->filp->f_path;
ssize_t xattr_list_len;
int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
+ int buf_free_len;
+ struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
&stat);
@@ -4420,6 +4458,12 @@ static void get_file_stream_info(struct ksmbd_work *work,
goto out;
}
+ buf_free_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (buf_free_len < 0)
+ goto out;
+
while (idx < xattr_list_len) {
stream_name = xattr_list + idx;
streamlen = strlen(stream_name);
@@ -4444,6 +4488,10 @@ static void get_file_stream_info(struct ksmbd_work *work,
streamlen = snprintf(stream_buf, streamlen + 1,
":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
+ next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
+ if (next > buf_free_len)
+ break;
+
file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
stream_buf, streamlen,
@@ -4454,12 +4502,13 @@ static void get_file_stream_info(struct ksmbd_work *work,
file_info->StreamSize = cpu_to_le64(stream_name_len);
file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
- next = sizeof(struct smb2_file_stream_info) + streamlen;
nbytes += next;
+ buf_free_len -= next;
file_info->NextEntryOffset = cpu_to_le32(next);
}
- if (!S_ISDIR(stat.mode)) {
+ if (!S_ISDIR(stat.mode) &&
+ buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
file_info = (struct smb2_file_stream_info *)
&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
@@ -6220,8 +6269,7 @@ static noinline int smb2_write_pipe(struct ksmbd_work *work)
(offsetof(struct smb2_write_req, Buffer) - 4)) {
data_buf = (char *)&req->Buffer[0];
} else {
- if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
- (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
+ if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req)) {
pr_err("invalid write data offset %u, smb_len %u\n",
le16_to_cpu(req->DataOffset),
get_rfc1002_len(req));
@@ -6379,8 +6427,7 @@ int smb2_write(struct ksmbd_work *work)
(offsetof(struct smb2_write_req, Buffer) - 4)) {
data_buf = (char *)&req->Buffer[0];
} else {
- if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
- (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
+ if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req)) {
pr_err("invalid write data offset %u, smb_len %u\n",
le16_to_cpu(req->DataOffset),
get_rfc1002_len(req));
@@ -7023,24 +7070,26 @@ out2:
return err;
}
-static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
+static int fsctl_copychunk(struct ksmbd_work *work,
+ struct copychunk_ioctl_req *ci_req,
+ unsigned int cnt_code,
+ unsigned int input_count,
+ unsigned long long volatile_id,
+ unsigned long long persistent_id,
struct smb2_ioctl_rsp *rsp)
{
- struct copychunk_ioctl_req *ci_req;
struct copychunk_ioctl_rsp *ci_rsp;
struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
struct srv_copychunk *chunks;
unsigned int i, chunk_count, chunk_count_written = 0;
unsigned int chunk_size_written = 0;
loff_t total_size_written = 0;
- int ret, cnt_code;
+ int ret = 0;
- cnt_code = le32_to_cpu(req->CntCode);
- ci_req = (struct copychunk_ioctl_req *)&req->Buffer[0];
ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
- rsp->VolatileFileId = req->VolatileFileId;
- rsp->PersistentFileId = req->PersistentFileId;
+ rsp->VolatileFileId = cpu_to_le64(volatile_id);
+ rsp->PersistentFileId = cpu_to_le64(persistent_id);
ci_rsp->ChunksWritten =
cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
ci_rsp->ChunkBytesWritten =
@@ -7050,12 +7099,13 @@ static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
chunk_count = le32_to_cpu(ci_req->ChunkCount);
+ if (chunk_count == 0)
+ goto out;
total_size_written = 0;
/* verify the SRV_COPYCHUNK_COPY packet */
if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
- le32_to_cpu(req->InputCount) <
- offsetof(struct copychunk_ioctl_req, Chunks) +
+ input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
chunk_count * sizeof(struct srv_copychunk)) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
return -EINVAL;
@@ -7076,9 +7126,7 @@ static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
src_fp = ksmbd_lookup_foreign_fd(work,
le64_to_cpu(ci_req->ResumeKey[0]));
- dst_fp = ksmbd_lookup_fd_slow(work,
- le64_to_cpu(req->VolatileFileId),
- le64_to_cpu(req->PersistentFileId));
+ dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
ret = -EINVAL;
if (!src_fp ||
src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
@@ -7153,8 +7201,8 @@ static __be32 idev_ipv4_address(struct in_device *idev)
}
static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
- struct smb2_ioctl_req *req,
- struct smb2_ioctl_rsp *rsp)
+ struct smb2_ioctl_rsp *rsp,
+ unsigned int out_buf_len)
{
struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
int nbytes = 0;
@@ -7166,6 +7214,12 @@ static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
rtnl_lock();
for_each_netdev(&init_net, netdev) {
+ if (out_buf_len <
+ nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
+ rtnl_unlock();
+ return -ENOSPC;
+ }
+
if (netdev->type == ARPHRD_LOOPBACK)
continue;
@@ -7245,11 +7299,6 @@ static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
if (nii_rsp)
nii_rsp->Next = 0;
- if (!nbytes) {
- rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
- return -EINVAL;
- }
-
rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
return nbytes;
@@ -7257,11 +7306,16 @@ static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
struct validate_negotiate_info_req *neg_req,
- struct validate_negotiate_info_rsp *neg_rsp)
+ struct validate_negotiate_info_rsp *neg_rsp,
+ unsigned int in_buf_len)
{
int ret = 0;
int dialect;
+ if (in_buf_len < sizeof(struct validate_negotiate_info_req) +
+ le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
+ return -EINVAL;
+
dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
neg_req->DialectCount);
if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
@@ -7295,7 +7349,7 @@ err_out:
static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
struct file_allocated_range_buffer *qar_req,
struct file_allocated_range_buffer *qar_rsp,
- int in_count, int *out_count)
+ unsigned int in_count, unsigned int *out_count)
{
struct ksmbd_file *fp;
loff_t start, length;
@@ -7322,7 +7376,8 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
}
static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
- int out_buf_len, struct smb2_ioctl_req *req,
+ unsigned int out_buf_len,
+ struct smb2_ioctl_req *req,
struct smb2_ioctl_rsp *rsp)
{
struct ksmbd_rpc_command *rpc_resp;
@@ -7436,8 +7491,7 @@ int smb2_ioctl(struct ksmbd_work *work)
{
struct smb2_ioctl_req *req;
struct smb2_ioctl_rsp *rsp, *rsp_org;
- int cnt_code, nbytes = 0;
- int out_buf_len;
+ unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
u64 id = KSMBD_NO_FID;
struct ksmbd_conn *conn = work->conn;
int ret = 0;
@@ -7465,8 +7519,14 @@ int smb2_ioctl(struct ksmbd_work *work)
}
cnt_code = le32_to_cpu(req->CntCode);
- out_buf_len = le32_to_cpu(req->MaxOutputResponse);
- out_buf_len = min(KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
+ ret = smb2_calc_max_out_buf_len(work, 48,
+ le32_to_cpu(req->MaxOutputResponse));
+ if (ret < 0) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+ out_buf_len = (unsigned int)ret;
+ in_buf_len = le32_to_cpu(req->InputCount);
switch (cnt_code) {
case FSCTL_DFS_GET_REFERRALS:
@@ -7494,6 +7554,7 @@ int smb2_ioctl(struct ksmbd_work *work)
break;
}
case FSCTL_PIPE_TRANSCEIVE:
+ out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
break;
case FSCTL_VALIDATE_NEGOTIATE_INFO:
@@ -7502,9 +7563,16 @@ int smb2_ioctl(struct ksmbd_work *work)
goto out;
}
+ if (in_buf_len < sizeof(struct validate_negotiate_info_req))
+ return -EINVAL;
+
+ if (out_buf_len < sizeof(struct validate_negotiate_info_rsp))
+ return -EINVAL;
+
ret = fsctl_validate_negotiate_info(conn,
(struct validate_negotiate_info_req *)&req->Buffer[0],
- (struct validate_negotiate_info_rsp *)&rsp->Buffer[0]);
+ (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
+ in_buf_len);
if (ret < 0)
goto out;
@@ -7513,9 +7581,10 @@ int smb2_ioctl(struct ksmbd_work *work)
rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
break;
case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
- nbytes = fsctl_query_iface_info_ioctl(conn, req, rsp);
- if (nbytes < 0)
+ ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
+ if (ret < 0)
goto out;
+ nbytes = ret;
break;
case FSCTL_REQUEST_RESUME_KEY:
if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
@@ -7540,15 +7609,33 @@ int smb2_ioctl(struct ksmbd_work *work)
goto out;
}
+ if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
ret = -EINVAL;
goto out;
}
nbytes = sizeof(struct copychunk_ioctl_rsp);
- fsctl_copychunk(work, req, rsp);
+ rsp->VolatileFileId = req->VolatileFileId;
+ rsp->PersistentFileId = req->PersistentFileId;
+ fsctl_copychunk(work,
+ (struct copychunk_ioctl_req *)&req->Buffer[0],
+ le32_to_cpu(req->CntCode),
+ le32_to_cpu(req->InputCount),
+ le64_to_cpu(req->VolatileFileId),
+ le64_to_cpu(req->PersistentFileId),
+ rsp);
break;
case FSCTL_SET_SPARSE:
+ if (in_buf_len < sizeof(struct file_sparse)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
ret = fsctl_set_sparse(work, id,
(struct file_sparse *)&req->Buffer[0]);
if (ret < 0)
@@ -7567,6 +7654,11 @@ int smb2_ioctl(struct ksmbd_work *work)
goto out;
}
+ if (in_buf_len < sizeof(struct file_zero_data_information)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
zero_data =
(struct file_zero_data_information *)&req->Buffer[0];
@@ -7586,6 +7678,11 @@ int smb2_ioctl(struct ksmbd_work *work)
break;
}
case FSCTL_QUERY_ALLOCATED_RANGES:
+ if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
ret = fsctl_query_allocated_ranges(work, id,
(struct file_allocated_range_buffer *)&req->Buffer[0],
(struct file_allocated_range_buffer *)&rsp->Buffer[0],
@@ -7626,6 +7723,11 @@ int smb2_ioctl(struct ksmbd_work *work)
struct duplicate_extents_to_file *dup_ext;
loff_t src_off, dst_off, length, cloned;
+ if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
@@ -7696,6 +7798,8 @@ out:
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
else if (ret == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ else if (ret == -ENOSPC)
+ rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
else if (ret < 0 || rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
diff --git a/fs/ksmbd/smb2pdu.h b/fs/ksmbd/smb2pdu.h
index a6dec5ec6a54..ff5a2f01d34a 100644
--- a/fs/ksmbd/smb2pdu.h
+++ b/fs/ksmbd/smb2pdu.h
@@ -113,6 +113,8 @@
#define SMB21_DEFAULT_IOSIZE (1024 * 1024)
#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
#define SMB3_DEFAULT_TRANS_SIZE (1024 * 1024)
+#define SMB3_MIN_IOSIZE (64 * 1024)
+#define SMB3_MAX_IOSIZE (8 * 1024 * 1024)
/*
* SMB2 Header Definition
diff --git a/fs/ksmbd/transport_ipc.c b/fs/ksmbd/transport_ipc.c
index 44aea33a67fa..1acf1892a466 100644
--- a/fs/ksmbd/transport_ipc.c
+++ b/fs/ksmbd/transport_ipc.c
@@ -601,7 +601,7 @@ int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,
return ret;
}
-int ksmbd_ipc_logout_request(const char *account)
+int ksmbd_ipc_logout_request(const char *account, int flags)
{
struct ksmbd_ipc_msg *msg;
struct ksmbd_logout_request *req;
@@ -616,6 +616,7 @@ int ksmbd_ipc_logout_request(const char *account)
msg->type = KSMBD_EVENT_LOGOUT_REQUEST;
req = (struct ksmbd_logout_request *)msg->payload;
+ req->account_flags = flags;
strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ);
ret = ipc_msg_send(msg);
diff --git a/fs/ksmbd/transport_ipc.h b/fs/ksmbd/transport_ipc.h
index 9eacc895ffdb..5e5b90a0c187 100644
--- a/fs/ksmbd/transport_ipc.h
+++ b/fs/ksmbd/transport_ipc.h
@@ -25,7 +25,7 @@ ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess,
struct sockaddr *peer_addr);
int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id,
unsigned long long connect_id);
-int ksmbd_ipc_logout_request(const char *account);
+int ksmbd_ipc_logout_request(const char *account, int flags);
struct ksmbd_share_config_response *
ksmbd_ipc_share_config_request(const char *name);
struct ksmbd_spnego_authen_response *
diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index 3a7fa23ba850..a2fd5a4d4cd5 100644
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -549,6 +549,10 @@ static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
switch (recvmsg->type) {
case SMB_DIRECT_MSG_NEGOTIATE_REQ:
+ if (wc->byte_len < sizeof(struct smb_direct_negotiate_req)) {
+ put_empty_recvmsg(t, recvmsg);
+ return;
+ }
t->negotiation_requested = true;
t->full_packet_received = true;
wake_up_interruptible(&t->wait_status);
@@ -556,10 +560,23 @@ static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
case SMB_DIRECT_MSG_DATA_TRANSFER: {
struct smb_direct_data_transfer *data_transfer =
(struct smb_direct_data_transfer *)recvmsg->packet;
- int data_length = le32_to_cpu(data_transfer->data_length);
+ unsigned int data_length;
int avail_recvmsg_count, receive_credits;
+ if (wc->byte_len <
+ offsetof(struct smb_direct_data_transfer, padding)) {
+ put_empty_recvmsg(t, recvmsg);
+ return;
+ }
+
+ data_length = le32_to_cpu(data_transfer->data_length);
if (data_length) {
+ if (wc->byte_len < sizeof(struct smb_direct_data_transfer) +
+ (u64)data_length) {
+ put_empty_recvmsg(t, recvmsg);
+ return;
+ }
+
if (t->full_packet_received)
recvmsg->first_segment = true;
@@ -568,7 +585,7 @@ static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
else
t->full_packet_received = true;
- enqueue_reassembly(t, recvmsg, data_length);
+ enqueue_reassembly(t, recvmsg, (int)data_length);
wake_up_interruptible(&t->wait_reassembly_queue);
spin_lock(&t->receive_credit_lock);
diff --git a/fs/ksmbd/vfs.c b/fs/ksmbd/vfs.c
index b41954294d38..835b384b0895 100644
--- a/fs/ksmbd/vfs.c
+++ b/fs/ksmbd/vfs.c
@@ -1023,7 +1023,7 @@ int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
struct file_allocated_range_buffer *ranges,
- int in_count, int *out_count)
+ unsigned int in_count, unsigned int *out_count)
{
struct file *f = fp->filp;
struct inode *inode = file_inode(fp->filp);
diff --git a/fs/ksmbd/vfs.h b/fs/ksmbd/vfs.h
index 7b1dcaa3fbdc..b0d5b8feb4a3 100644
--- a/fs/ksmbd/vfs.h
+++ b/fs/ksmbd/vfs.h
@@ -166,7 +166,7 @@ int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
struct file_allocated_range_buffer;
int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
struct file_allocated_range_buffer *ranges,
- int in_count, int *out_count);
+ unsigned int in_count, unsigned int *out_count);
int ksmbd_vfs_unlink(struct user_namespace *user_ns,
struct dentry *dir, struct dentry *dentry);
void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 09:49:23 +0000