diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 151 |
1 files changed, 75 insertions, 76 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 941441d3e386..30709589e0c9 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -5282,9 +5282,10 @@ CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon, int rc = 0; int bytes_returned; int name_len; + struct fealist *ea_response_data; struct fea *temp_fea; char *temp_ptr; - __u16 params, byte_count; + __u16 params, byte_count, data_offset; cFYI(1, ("In Query All EAs path %s", searchName)); QAllEAsRetry: @@ -5334,85 +5335,83 @@ QAllEAsRetry: (struct smb_hdr *) pSMBr, &bytes_returned, 0); if (rc) { cFYI(1, ("Send error in QueryAllEAs = %d", rc)); - } else { /* decode response */ - rc = validate_t2((struct smb_t2_rsp *)pSMBr); + goto QAllEAsOut; + } - /* BB also check enough total bytes returned */ - /* BB we need to improve the validity checking - of these trans2 responses */ - if (rc || (pSMBr->ByteCount < 4)) - rc = -EIO; /* bad smb */ - /* else if (pFindData){ - memcpy((char *) pFindData, - (char *) &pSMBr->hdr.Protocol + - data_offset, kl); - }*/ else { - /* check that length of list is not more than bcc */ - /* check that each entry does not go beyond length - of list */ - /* check that each element of each entry does not - go beyond end of list */ - __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - struct fealist *ea_response_data; - rc = 0; - /* validate_trans2_offsets() */ - /* BB check if start of smb + data_offset > &bcc+ bcc */ - ea_response_data = (struct fealist *) - (((char *) &pSMBr->hdr.Protocol) + - data_offset); - name_len = le32_to_cpu(ea_response_data->list_len); - cFYI(1, ("ea length %d", name_len)); - if (name_len <= 8) { - /* returned EA size zeroed at top of function */ - cFYI(1, ("empty EA list returned from server")); - } else { - /* account for ea list len */ - name_len -= 4; - temp_fea = ea_response_data->list; - temp_ptr = (char *)temp_fea; - while (name_len > 0) { - __u16 value_len; - name_len -= 4; - temp_ptr += 4; - rc += temp_fea->name_len; - /* account for prefix user. and trailing null */ - rc = rc + 5 + 1; - if (rc < (int)buf_size) { - memcpy(EAData, "user.", 5); - EAData += 5; - memcpy(EAData, temp_ptr, - temp_fea->name_len); - EAData += temp_fea->name_len; - /* null terminate name */ - *EAData = 0; - EAData = EAData + 1; - } else if (buf_size == 0) { - /* skip copy - calc size only */ - } else { - /* stop before overrun buffer */ - rc = -ERANGE; - break; - } - name_len -= temp_fea->name_len; - temp_ptr += temp_fea->name_len; - /* account for trailing null */ - name_len--; - temp_ptr++; - value_len = - le16_to_cpu(temp_fea->value_len); - name_len -= value_len; - temp_ptr += value_len; - /* BB check that temp_ptr is still - within the SMB BB*/ - /* no trailing null to account for - in value len */ - /* go on to next EA */ - temp_fea = (struct fea *)temp_ptr; - } - } + /* BB also check enough total bytes returned */ + /* BB we need to improve the validity checking + of these trans2 responses */ + + rc = validate_t2((struct smb_t2_rsp *)pSMBr); + if (rc || (pSMBr->ByteCount < 4)) { + rc = -EIO; /* bad smb */ + goto QAllEAsOut; + } + + /* check that length of list is not more than bcc */ + /* check that each entry does not go beyond length + of list */ + /* check that each element of each entry does not + go beyond end of list */ + /* validate_trans2_offsets() */ + /* BB check if start of smb + data_offset > &bcc+ bcc */ + + data_offset = le16_to_cpu(pSMBr->t2.DataOffset); + ea_response_data = (struct fealist *) + (((char *) &pSMBr->hdr.Protocol) + data_offset); + + name_len = le32_to_cpu(ea_response_data->list_len); + cFYI(1, ("ea length %d", name_len)); + if (name_len <= 8) { + cFYI(1, ("empty EA list returned from server")); + goto QAllEAsOut; + } + + /* account for ea list len */ + name_len -= 4; + temp_fea = ea_response_data->list; + temp_ptr = (char *)temp_fea; + while (name_len > 0) { + __u16 value_len; + name_len -= 4; + temp_ptr += 4; + rc += temp_fea->name_len; + /* account for prefix user. and trailing null */ + rc = rc + 5 + 1; + if (rc < (int) buf_size) { + memcpy(EAData, "user.", 5); + EAData += 5; + memcpy(EAData, temp_ptr, temp_fea->name_len); + EAData += temp_fea->name_len; + /* null terminate name */ + *EAData = 0; + EAData = EAData + 1; + } else if (buf_size == 0) { + /* skip copy - calc size only */ + } else { + /* stop before overrun buffer */ + rc = -ERANGE; + break; } + name_len -= temp_fea->name_len; + temp_ptr += temp_fea->name_len; + /* account for trailing null */ + name_len--; + temp_ptr++; + value_len = le16_to_cpu(temp_fea->value_len); + name_len -= value_len; + temp_ptr += value_len; + /* BB check that temp_ptr is still + within the SMB BB*/ + + /* no trailing null to account for + in value len */ + /* go on to next EA */ + temp_fea = (struct fea *)temp_ptr; } + +QAllEAsOut: cifs_buf_release(pSMB); if (rc == -EAGAIN) goto QAllEAsRetry; |