From patchwork Sun Sep 11 20:57:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Atte_Heikkil=C3=A4?= X-Patchwork-Id: 12973064 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C155ECAAD3 for ; Sun, 11 Sep 2022 20:57:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229517AbiIKU5p (ORCPT ); Sun, 11 Sep 2022 16:57:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229459AbiIKU5o (ORCPT ); Sun, 11 Sep 2022 16:57:44 -0400 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB6A324BEF for ; Sun, 11 Sep 2022 13:57:42 -0700 (PDT) Received: by mail-lf1-x135.google.com with SMTP id m15so11752506lfl.9 for ; Sun, 11 Sep 2022 13:57:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=tvsdfAlyRV/BPyPYli6S+BG9+lGaolYc0yEpNMhZ8CM=; b=jsgK9ffrPmlqZ47yRFZqvyzT5M2Rws88xbe9pbbfAPAwJVNgd/EQ7sTb3/yLEyxEXs fR1rnPPY7VBH/4VL+s+nxt3o0sNQeIGHaihfqPSxEob+bA1Z1iwYjMdL+pae4J4jF6cc ELYRsu6F6YMnQUTLfN/JjA4yyqYKNoJE7KIAnIbPzg+/a3ubWjKG2JBOFX/9yz1+uJDq G/8oVD/MiZeN5XsC4HofogUqYrF3X05klxsHXFziHX/lXkTJcod0DX3y3N8fyhysdp3a vghTg8zNcJJULg6wggBDXu5yq6xzQneTJ66k9maHqTwfyRbFoaP0yILIbnEbTY0dmobI 7++w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=tvsdfAlyRV/BPyPYli6S+BG9+lGaolYc0yEpNMhZ8CM=; b=zWIn7XWH+2eY5RyW9l/ycOOkr4FcV6zUhJjYjKr2kjBUZywSLwT0Cc8AXMacDtFVoS /tPh19wSAln1bT814YesF/zpsXiDWfZL0FxKhhf3k6xb8xAw1P9SRUi7u9i5sTT22X5y Rd4q5yQTbcvP8jrTIgFr9soPpj9vQPXmZlpDGqEhCOaFaP9L3uEdd1UNkqr/j5aZVV9c 4ZWKCqysEKPBE1X0Y1w7wasTHpaylN6eWoNrWUtOf+EC9bl92qODbmXpkic70jQIPZdv O5mFDEHmmyboBhHFHF1lv+p9CNvZnk6z9Jdk9zsYo4ns6kPSqYyPbIGmYcqapHznAEd7 jMvg== X-Gm-Message-State: ACgBeo1CajwrvkyX1QVnuYH6TvyzoKqU5Fic6Vo3pmD7hKm+lTO0MzwH t1VoY9IfkJ8eRGWdQEvnB3m+UFRirXo= X-Google-Smtp-Source: AA6agR6vH0U/FL1pA5bQtxukwNXsNTmp89LaMO2+5cF/A8/PMk4cfWafVdg8g5ui9nSW29L+Y+/h8w== X-Received: by 2002:a05:6512:261b:b0:492:cd8a:e1c with SMTP id bt27-20020a056512261b00b00492cd8a0e1cmr7469970lfb.528.1662929861039; Sun, 11 Sep 2022 13:57:41 -0700 (PDT) Received: from pohjola.lan (mobile-user-2e84bc-66.dhcp.inet.fi. [46.132.188.66]) by smtp.gmail.com with ESMTPSA id d30-20020a19385e000000b00492e98c27ebsm723640lfj.91.2022.09.11.13.57.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Sep 2022 13:57:40 -0700 (PDT) From: =?utf-8?q?Atte_Heikkil=C3=A4?= To: linux-cifs@vger.kernel.org Cc: =?utf-8?q?Atte_Heikkil=C3=A4?= Subject: [PATCH 1/2] ksmbd: casefold utf-8 share names and fix ascii lowercase conversion Date: Sun, 11 Sep 2022 23:57:28 +0300 Message-Id: <20220911205729.299358-1-atteh.mailbox@gmail.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org strtolower() corrupts all UTF-8 share names that have a byte in the C0 (À ISO8859-1) to DE (Þ ISO8859-1) range, since the non-ASCII part of ISO8859-1 is incompatible with UTF-8. Prevent this by checking that a byte is in the ASCII range with isascii(), before the conversion to lowercase with tolower(). Properly handle case-insensitivity of UTF-8 share names by casefolding them, but fallback to ASCII lowercase conversion on failure or if CONFIG_UNICODE is not set. Refactor to move the share name casefolding immediately after the share name extraction. Also, make the associated constness corrections. Signed-off-by: Atte Heikkilä --- fs/ksmbd/connection.c | 8 +++++++ fs/ksmbd/connection.h | 1 + fs/ksmbd/mgmt/share_config.c | 18 ++++----------- fs/ksmbd/mgmt/share_config.h | 2 +- fs/ksmbd/mgmt/tree_connect.c | 2 +- fs/ksmbd/mgmt/tree_connect.h | 2 +- fs/ksmbd/misc.c | 45 +++++++++++++++++++++++++++++------- fs/ksmbd/misc.h | 2 +- fs/ksmbd/smb2pdu.c | 2 +- fs/ksmbd/unicode.h | 3 ++- 10 files changed, 57 insertions(+), 28 deletions(-) diff --git a/fs/ksmbd/connection.c b/fs/ksmbd/connection.c index 756ad631c019..12be8386446a 100644 --- a/fs/ksmbd/connection.c +++ b/fs/ksmbd/connection.c @@ -60,6 +60,12 @@ struct ksmbd_conn *ksmbd_conn_alloc(void) conn->local_nls = load_nls("utf8"); if (!conn->local_nls) conn->local_nls = load_nls_default(); + if (IS_ENABLED(CONFIG_UNICODE)) + conn->um = utf8_load(UNICODE_AGE(12, 1, 0)); + else + conn->um = ERR_PTR(-EOPNOTSUPP); + if (IS_ERR(conn->um)) + conn->um = NULL; atomic_set(&conn->req_running, 0); atomic_set(&conn->r_count, 0); conn->total_credits = 1; @@ -350,6 +356,8 @@ int ksmbd_conn_handler_loop(void *p) wait_event(conn->r_count_q, atomic_read(&conn->r_count) == 0); + if (IS_ENABLED(CONFIG_UNICODE)) + utf8_unload(conn->um); unload_nls(conn->local_nls); if (default_conn_ops.terminate_fn) default_conn_ops.terminate_fn(conn); diff --git a/fs/ksmbd/connection.h b/fs/ksmbd/connection.h index e7f7d5707951..41d96f5cef06 100644 --- a/fs/ksmbd/connection.h +++ b/fs/ksmbd/connection.h @@ -46,6 +46,7 @@ struct ksmbd_conn { char *request_buf; struct ksmbd_transport *transport; struct nls_table *local_nls; + struct unicode_map *um; struct list_head conns_list; /* smb session 1 per user */ struct xarray sessions; diff --git a/fs/ksmbd/mgmt/share_config.c b/fs/ksmbd/mgmt/share_config.c index c9bca1c2c834..5d039704c23c 100644 --- a/fs/ksmbd/mgmt/share_config.c +++ b/fs/ksmbd/mgmt/share_config.c @@ -26,7 +26,7 @@ struct ksmbd_veto_pattern { struct list_head list; }; -static unsigned int share_name_hash(char *name) +static unsigned int share_name_hash(const char *name) { return jhash(name, strlen(name), 0); } @@ -72,7 +72,7 @@ __get_share_config(struct ksmbd_share_config *share) return share; } -static struct ksmbd_share_config *__share_lookup(char *name) +static struct ksmbd_share_config *__share_lookup(const char *name) { struct ksmbd_share_config *share; unsigned int key = share_name_hash(name); @@ -119,7 +119,7 @@ static int parse_veto_list(struct ksmbd_share_config *share, return 0; } -static struct ksmbd_share_config *share_config_request(char *name) +static struct ksmbd_share_config *share_config_request(const char *name) { struct ksmbd_share_config_response *resp; struct ksmbd_share_config *share = NULL; @@ -190,20 +190,10 @@ static struct ksmbd_share_config *share_config_request(char *name) return share; } -static void strtolower(char *share_name) -{ - while (*share_name) { - *share_name = tolower(*share_name); - share_name++; - } -} - -struct ksmbd_share_config *ksmbd_share_config_get(char *name) +struct ksmbd_share_config *ksmbd_share_config_get(const char *name) { struct ksmbd_share_config *share; - strtolower(name); - down_read(&shares_table_lock); share = __share_lookup(name); if (share) diff --git a/fs/ksmbd/mgmt/share_config.h b/fs/ksmbd/mgmt/share_config.h index 902f2cb1963a..7f7e89ecfe61 100644 --- a/fs/ksmbd/mgmt/share_config.h +++ b/fs/ksmbd/mgmt/share_config.h @@ -74,7 +74,7 @@ static inline void ksmbd_share_config_put(struct ksmbd_share_config *share) __ksmbd_share_config_put(share); } -struct ksmbd_share_config *ksmbd_share_config_get(char *name); +struct ksmbd_share_config *ksmbd_share_config_get(const char *name); bool ksmbd_share_veto_filename(struct ksmbd_share_config *share, const char *filename); #endif /* __SHARE_CONFIG_MANAGEMENT_H__ */ diff --git a/fs/ksmbd/mgmt/tree_connect.c b/fs/ksmbd/mgmt/tree_connect.c index 97ab7987df6e..867c0286b901 100644 --- a/fs/ksmbd/mgmt/tree_connect.c +++ b/fs/ksmbd/mgmt/tree_connect.c @@ -17,7 +17,7 @@ struct ksmbd_tree_conn_status ksmbd_tree_conn_connect(struct ksmbd_conn *conn, struct ksmbd_session *sess, - char *share_name) + const char *share_name) { struct ksmbd_tree_conn_status status = {-ENOENT, NULL}; struct ksmbd_tree_connect_response *resp = NULL; diff --git a/fs/ksmbd/mgmt/tree_connect.h b/fs/ksmbd/mgmt/tree_connect.h index 71e50271dccf..0f97ddc1e39c 100644 --- a/fs/ksmbd/mgmt/tree_connect.h +++ b/fs/ksmbd/mgmt/tree_connect.h @@ -42,7 +42,7 @@ struct ksmbd_session; struct ksmbd_tree_conn_status ksmbd_tree_conn_connect(struct ksmbd_conn *conn, struct ksmbd_session *sess, - char *share_name); + const char *share_name); int ksmbd_tree_conn_disconnect(struct ksmbd_session *sess, struct ksmbd_tree_connect *tree_conn); diff --git a/fs/ksmbd/misc.c b/fs/ksmbd/misc.c index df991107ad2c..8316e2bf926d 100644 --- a/fs/ksmbd/misc.c +++ b/fs/ksmbd/misc.c @@ -7,6 +7,7 @@ #include #include #include +#include #include "misc.h" #include "smb_common.h" @@ -226,26 +227,54 @@ void ksmbd_conv_path_to_windows(char *path) strreplace(path, '/', '\\'); } +static char *casefold_sharename(struct unicode_map *um, const char *name) +{ + char *cf_name; + int cf_len; + + cf_name = kzalloc(KSMBD_REQ_MAX_SHARE_NAME, GFP_KERNEL); + if (!cf_name) + return ERR_PTR(-ENOMEM); + + if (IS_ENABLED(CONFIG_UNICODE)) { + const struct qstr q_name = {.name = name, .len = strlen(name)}; + + if (!um) + goto out_ascii; + + cf_len = utf8_casefold(um, &q_name, cf_name, + KSMBD_REQ_MAX_SHARE_NAME); + if (cf_len < 0) + goto out_ascii; + + return cf_name; + } + +out_ascii: + cf_len = strscpy(cf_name, name, KSMBD_REQ_MAX_SHARE_NAME); + if (cf_len < 0) + return ERR_PTR(-E2BIG); + + for (; *cf_name; ++cf_name) + *cf_name = isascii(*cf_name) ? tolower(*cf_name) : *cf_name; + return cf_name - cf_len; +} + /** * ksmbd_extract_sharename() - get share name from tree connect request * @treename: buffer containing tree name and share name * * Return: share name on success, otherwise error */ -char *ksmbd_extract_sharename(char *treename) +char *ksmbd_extract_sharename(struct unicode_map *um, const char *treename) { - char *name = treename; - char *dst; - char *pos = strrchr(name, '\\'); + const char *name = treename, *pos = strrchr(name, '\\'); if (pos) name = (pos + 1); /* caller has to free the memory */ - dst = kstrdup(name, GFP_KERNEL); - if (!dst) - return ERR_PTR(-ENOMEM); - return dst; + return casefold_sharename(um, name); } /** diff --git a/fs/ksmbd/misc.h b/fs/ksmbd/misc.h index aae2a252945f..fbb7db560a28 100644 --- a/fs/ksmbd/misc.h +++ b/fs/ksmbd/misc.h @@ -20,7 +20,7 @@ int get_nlink(struct kstat *st); void ksmbd_conv_path_to_unix(char *path); void ksmbd_strip_last_slash(char *path); void ksmbd_conv_path_to_windows(char *path); -char *ksmbd_extract_sharename(char *treename); +char *ksmbd_extract_sharename(struct unicode_map *um, const char *treename); char *convert_to_unix_name(struct ksmbd_share_config *share, const char *name); #define KSMBD_DIR_INFO_ALIGNMENT 8 diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 19412ac701a6..62a8da520810 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -1883,7 +1883,7 @@ int smb2_tree_connect(struct ksmbd_work *work) goto out_err1; } - name = ksmbd_extract_sharename(treename); + name = ksmbd_extract_sharename(conn->um, treename); if (IS_ERR(name)) { status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; diff --git a/fs/ksmbd/unicode.h b/fs/ksmbd/unicode.h index 5593024230ae..076f6034a789 100644 --- a/fs/ksmbd/unicode.h +++ b/fs/ksmbd/unicode.h @@ -24,6 +24,7 @@ #include #include #include +#include #define UNIUPR_NOLOWER /* Example to not expand lower case tables */ @@ -69,7 +70,7 @@ char *smb_strndup_from_utf16(const char *src, const int maxlen, const struct nls_table *codepage); int smbConvertToUTF16(__le16 *target, const char *source, int srclen, const struct nls_table *cp, int mapchars); -char *ksmbd_extract_sharename(char *treename); +char *ksmbd_extract_sharename(struct unicode_map *um, const char *treename); #endif /* From patchwork Sun Sep 11 20:57:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Atte_Heikkil=C3=A4?= X-Patchwork-Id: 12973065 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06901C6FA83 for ; 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[46.132.188.66]) by smtp.gmail.com with ESMTPSA id d30-20020a19385e000000b00492e98c27ebsm723640lfj.91.2022.09.11.13.57.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Sep 2022 13:57:45 -0700 (PDT) From: =?utf-8?q?Atte_Heikkil=C3=A4?= To: linux-cifs@vger.kernel.org Cc: =?utf-8?q?Atte_Heikkil=C3=A4?= Subject: [PATCH 2/2] ksmbd-tools: casefold utf-8 share names Date: Sun, 11 Sep 2022 23:57:29 +0300 Message-Id: <20220911205729.299358-2-atteh.mailbox@gmail.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220911205729.299358-1-atteh.mailbox@gmail.com> References: <20220911205729.299358-1-atteh.mailbox@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Match kernel space behavior regarding case-insensitivity of UTF-8 share names by first NFD(I) normalizing and then casefolding them. Fallback to ASCII lowercase conversion on failure. Signed-off-by: Atte Heikkilä --- addshare/addshare.c | 6 +++--- include/management/share.h | 1 + lib/config_parser.c | 2 +- lib/management/share.c | 19 +++++++++++++++++++ mountd/rpc_srvsvc.c | 2 +- 5 files changed, 25 insertions(+), 5 deletions(-) diff --git a/addshare/addshare.c b/addshare/addshare.c index f5894c9..be4c67d 100644 --- a/addshare/addshare.c +++ b/addshare/addshare.c @@ -123,17 +123,17 @@ int main(int argc, char *argv[]) switch (c) { case 'a': g_free(share); - share = g_ascii_strdown(optarg, strlen(optarg)); + share = shm_casefold_share_name(optarg, strlen(optarg)); command = command_add_share; break; case 'd': g_free(share); - share = g_ascii_strdown(optarg, strlen(optarg)); + share = shm_casefold_share_name(optarg, strlen(optarg)); command = command_del_share; break; case 'u': g_free(share); - share = g_ascii_strdown(optarg, strlen(optarg)); + share = shm_casefold_share_name(optarg, strlen(optarg)); command = command_update_share; break; case 'o': diff --git a/include/management/share.h b/include/management/share.h index 306cca5..bb3952c 100644 --- a/include/management/share.h +++ b/include/management/share.h @@ -141,6 +141,7 @@ static inline int test_share_flag(struct ksmbd_share *share, int flag) struct ksmbd_share *get_ksmbd_share(struct ksmbd_share *share); void put_ksmbd_share(struct ksmbd_share *share); +char *shm_casefold_share_name(char *name, size_t len); struct ksmbd_share *shm_lookup_share(char *name); struct smbconf_group; diff --git a/lib/config_parser.c b/lib/config_parser.c index 2dbc0c7..a1dc85c 100644 --- a/lib/config_parser.c +++ b/lib/config_parser.c @@ -93,7 +93,7 @@ static int add_new_group(char *line) while (*end && *end != ']') end = g_utf8_find_next_char(end, NULL); - name = g_ascii_strdown(begin + 1, end - begin - 1); + name = shm_casefold_share_name(begin + 1, end - begin - 1); if (!name) goto out_free; diff --git a/lib/management/share.c b/lib/management/share.c index 22e6a83..fc09ea8 100644 --- a/lib/management/share.c +++ b/lib/management/share.c @@ -236,6 +236,25 @@ int shm_init(void) return 0; } +char *shm_casefold_share_name(char *name, size_t len) +{ + char *nfdi_name, *nfdicf_name; + + nfdi_name = g_utf8_normalize(name, len, G_NORMALIZE_NFD); + if (!nfdi_name) + goto out_ascii; + + nfdicf_name = g_utf8_casefold(nfdi_name, strlen(nfdi_name)); + if (!nfdicf_name) + goto out_ascii; + + g_free(nfdi_name); + return nfdicf_name; +out_ascii: + g_free(nfdi_name); + return g_ascii_strdown(name, len); +} + static struct ksmbd_share *__shm_lookup_share(char *name) { return g_hash_table_lookup(shares_table, name); diff --git a/mountd/rpc_srvsvc.c b/mountd/rpc_srvsvc.c index 38b984b..8716c34 100644 --- a/mountd/rpc_srvsvc.c +++ b/mountd/rpc_srvsvc.c @@ -171,7 +171,7 @@ static int srvsvc_share_get_info_invoke(struct ksmbd_rpc_pipe *pipe, int ret; gchar *share_name; - share_name = g_ascii_strdown(STR_VAL(hdr->share_name), + share_name = shm_casefold_share_name(STR_VAL(hdr->share_name), strlen(STR_VAL(hdr->share_name))); share = shm_lookup_share(share_name); if (!share)