diff options
Diffstat (limited to '')
| -rw-r--r-- | fs/cifs/smb2ops.c | 14 | ||||
| -rw-r--r-- | fs/cifs/smb2pdu.h | 2 |
2 files changed, 12 insertions, 4 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 4b0b14946343..e704e04891fb 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -2605,26 +2605,32 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, err_buf = err_iov.iov_base; if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) || err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) { - rc = -ENOENT; + rc = -EINVAL; + goto querty_exit; + } + + symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData; + if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG || + le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) { + rc = -EINVAL; goto querty_exit; } /* open must fail on symlink - reset rc */ rc = 0; - symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData; sub_len = le16_to_cpu(symlink->SubstituteNameLength); sub_offset = le16_to_cpu(symlink->SubstituteNameOffset); print_len = le16_to_cpu(symlink->PrintNameLength); print_offset = le16_to_cpu(symlink->PrintNameOffset); if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) { - rc = -ENOENT; + rc = -EINVAL; goto querty_exit; } if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) { - rc = -ENOENT; + rc = -EINVAL; goto querty_exit; } diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 458bad01ca74..7e2e782f8edd 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -166,6 +166,8 @@ struct smb2_err_rsp { __u8 ErrorData[1]; /* variable length */ } __packed; +#define SYMLINK_ERROR_TAG 0x4c4d5953 + struct smb2_symlink_err_rsp { __le32 SymLinkLength; __le32 SymLinkErrorTag; |