From: Thalia Archibald <thalia@archibald.dev>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Patrick Steinhardt <ps@pks.im>,
Chris Torek <chris.torek@gmail.com>,
Elijah Newren <newren@gmail.com>,
Thalia Archibald <thalia@archibald.dev>
Subject: [PATCH v5 0/8] fast-import: tighten parsing of paths
Date: Sun, 14 Apr 2024 01:11:32 +0000 [thread overview]
Message-ID: <cover.1713056559.git.thalia@archibald.dev> (raw)
In-Reply-To: <cover.1712907684.git.thalia@archibald.dev>
> fast-import has subtle differences in how it parses file paths between each
> occurrence of <path> in the grammar. Many errors are suppressed or not checked,
> which could lead to silent data corruption. A particularly bad case is when a
> front-end sent escapes that Git doesn't recognize (e.g., hex escapes are not
> supported), it would be treated as literal bytes instead of a quoted string.
>
> Bring path parsing into line with the documented behavior and improve
> documentation to fill in missing details.
Changes since v4:
* Refine C comments and parameter name.
Thalia
Thalia Archibald (8):
fast-import: tighten path unquoting
fast-import: directly use strbufs for paths
fast-import: allow unquoted empty path for root
fast-import: remove dead strbuf
fast-import: improve documentation for path quoting
fast-import: document C-style escapes for paths
fast-import: forbid escaped NUL in paths
fast-import: make comments more precise
Documentation/git-fast-import.txt | 31 +-
builtin/fast-import.c | 162 ++++----
t/t9300-fast-import.sh | 624 +++++++++++++++++++++---------
3 files changed, 555 insertions(+), 262 deletions(-)
Range-diff against v4:
1: d6ea8aca46 ! 1: 2c18fe5fe9 fast-import: tighten path unquoting
@@ builtin/fast-import.c: static uintmax_t parse_mark_ref_space(const char **p)
}
+/*
-+ * Parse the path string into the strbuf. It may be quoted with escape sequences
-+ * or unquoted without escape sequences. When unquoted, it may only contain a
-+ * space if `include_spaces` is nonzero.
++ * Parse the path string into the strbuf. The path can either be quoted with
++ * escape sequences or unquoted without escape sequences. Unquoted strings may
++ * contain spaces only if `is_last_field` is nonzero; otherwise, it stops
++ * parsing at the first space.
+ */
+static void parse_path(struct strbuf *sb, const char *p, const char **endp,
-+ int include_spaces, const char *field)
++ int is_last_field, const char *field)
+{
+ if (*p == '"') {
+ if (unquote_c_style(sb, p, endp))
+ die("Invalid %s: %s", field, command_buf.buf);
+ } else {
-+ if (include_spaces)
-+ *endp = p + strlen(p);
-+ else
-+ *endp = strchrnul(p, ' ');
++ /*
++ * Unless we are parsing the last field of a line,
++ * SP is the end of this field.
++ */
++ *endp = is_last_field
++ ? p + strlen(p)
++ : strchrnul(p, ' ');
+ strbuf_add(sb, p, *endp - p);
+ }
+}
+
+/*
+ * Parse the path string into the strbuf, and complain if this is not the end of
-+ * the string. It may contain spaces even when unquoted.
++ * the string. Unquoted strings may contain spaces.
+ */
+static void parse_path_eol(struct strbuf *sb, const char *p, const char *field)
+{
@@ builtin/fast-import.c: static uintmax_t parse_mark_ref_space(const char **p)
+
+/*
+ * Parse the path string into the strbuf, and ensure it is followed by a space.
-+ * It may not contain spaces when unquoted. Update *endp to point to the first
++ * Unquoted strings may not contain spaces. Update *endp to point to the first
+ * character after the space.
+ */
+static void parse_path_space(struct strbuf *sb, const char *p,
2: 9499f34aae = 2: 4e9f3aa52c fast-import: directly use strbufs for paths
3: 9b1e6b80f5 = 3: cae5764cec fast-import: allow unquoted empty path for root
4: 1a2b0dc616 = 4: 96ff70895a fast-import: remove dead strbuf
5: fb0d870d53 = 5: e1a1b0395d fast-import: improve documentation for path quoting
6: 4b6017ded8 = 6: 08e6fb37be fast-import: document C-style escapes for paths
7: 5b464f4b01 = 7: a01d0a1b25 fast-import: forbid escaped NUL in paths
8: 6eb66fce45 = 8: 65d7896e39 fast-import: make comments more precise
--
2.44.0
next prev parent reply other threads:[~2024-04-14 1:11 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-22 0:03 [PATCH 0/6] fast-import: tighten parsing of paths Thalia Archibald
2024-03-22 0:03 ` [PATCH 1/6] " Thalia Archibald
2024-03-22 0:11 ` Thalia Archibald
2024-03-28 8:21 ` Patrick Steinhardt
[not found] ` <E01C617F-3720-42C0-83EE-04BB01643C86@archibald.dev>
2024-04-01 9:05 ` Thalia Archibald
2024-03-22 0:03 ` [PATCH 2/6] fast-import: directly use strbufs for paths Thalia Archibald
2024-03-28 8:21 ` Patrick Steinhardt
2024-03-22 0:03 ` [PATCH 3/6] fast-import: release unfreed strbufs Thalia Archibald
2024-03-28 8:21 ` Patrick Steinhardt
2024-04-01 9:06 ` Thalia Archibald
2024-03-22 0:03 ` [PATCH 4/6] fast-import: remove dead strbuf Thalia Archibald
2024-03-28 8:21 ` Patrick Steinhardt
2024-03-22 0:03 ` [PATCH 5/6] fast-import: document C-style escapes for paths Thalia Archibald
2024-03-28 8:21 ` Patrick Steinhardt
2024-04-01 9:06 ` Thalia Archibald
2024-03-22 0:03 ` [PATCH 6/6] fast-import: forbid escaped NUL in paths Thalia Archibald
2024-04-01 9:02 ` [PATCH v2 0/8] fast-import: tighten parsing of paths Thalia Archibald
2024-04-01 9:02 ` [PATCH v2 1/8] fast-import: tighten path unquoting Thalia Archibald
2024-04-10 6:27 ` Patrick Steinhardt
2024-04-10 8:18 ` Chris Torek
2024-04-10 8:44 ` Thalia Archibald
2024-04-10 8:51 ` Chris Torek
2024-04-10 9:14 ` Thalia Archibald
2024-04-10 9:42 ` Patrick Steinhardt
2024-04-10 9:16 ` Thalia Archibald
2024-04-10 9:12 ` Thalia Archibald
2024-04-01 9:03 ` [PATCH v2 2/8] fast-import: directly use strbufs for paths Thalia Archibald
2024-04-10 6:27 ` Patrick Steinhardt
2024-04-10 10:07 ` Thalia Archibald
2024-04-10 10:18 ` Patrick Steinhardt
2024-04-01 9:03 ` [PATCH v2 3/8] fast-import: allow unquoted empty path for root Thalia Archibald
2024-04-10 6:27 ` Patrick Steinhardt
2024-04-01 9:03 ` [PATCH v2 4/8] fast-import: remove dead strbuf Thalia Archibald
2024-04-01 9:03 ` [PATCH v2 5/8] fast-import: improve documentation for unquoted paths Thalia Archibald
2024-04-01 9:03 ` [PATCH v2 6/8] fast-import: document C-style escapes for paths Thalia Archibald
2024-04-01 9:03 ` [PATCH v2 7/8] fast-import: forbid escaped NUL in paths Thalia Archibald
2024-04-01 9:03 ` [PATCH v2 8/8] fast-import: make comments more precise Thalia Archibald
2024-04-07 21:19 ` [PATCH v2 0/8] fast-import: tighten parsing of paths Thalia Archibald
2024-04-07 23:46 ` Eric Sunshine
2024-04-08 6:25 ` Patrick Steinhardt
2024-04-08 7:15 ` Thalia Archibald
2024-04-08 9:07 ` Patrick Steinhardt
2024-04-08 14:52 ` Junio C Hamano
2024-04-10 9:54 ` [PATCH v3 " Thalia Archibald
2024-04-10 9:55 ` [PATCH v3 1/8] fast-import: tighten path unquoting Thalia Archibald
2024-04-10 9:55 ` [PATCH v3 2/8] fast-import: directly use strbufs for paths Thalia Archibald
2024-04-10 9:55 ` [PATCH v3 3/8] fast-import: allow unquoted empty path for root Thalia Archibald
2024-04-11 19:59 ` Junio C Hamano
2024-04-10 9:55 ` [PATCH v3 4/8] fast-import: remove dead strbuf Thalia Archibald
2024-04-11 19:53 ` Junio C Hamano
2024-04-10 9:55 ` [PATCH v3 5/8] fast-import: improve documentation for unquoted paths Thalia Archibald
2024-04-11 19:51 ` Junio C Hamano
2024-04-10 9:56 ` [PATCH v3 6/8] fast-import: document C-style escapes for paths Thalia Archibald
2024-04-10 18:28 ` Junio C Hamano
2024-04-10 22:50 ` Thalia Archibald
2024-04-11 5:32 ` Junio C Hamano
2024-04-11 9:14 ` Patrick Steinhardt
2024-04-10 9:56 ` [PATCH v3 7/8] fast-import: forbid escaped NUL in paths Thalia Archibald
2024-04-10 18:51 ` Junio C Hamano
2024-04-10 9:56 ` [PATCH v3 8/8] fast-import: make comments more precise Thalia Archibald
2024-04-10 19:21 ` Junio C Hamano
2024-04-12 8:01 ` [PATCH v4 0/8] fast-import: tighten parsing of paths Thalia Archibald
2024-04-12 8:02 ` [PATCH v4 1/8] fast-import: tighten path unquoting Thalia Archibald
2024-04-12 16:34 ` Junio C Hamano
2024-04-13 0:07 ` Thalia Archibald
2024-04-13 18:33 ` Junio C Hamano
2024-04-12 8:03 ` [PATCH v4 2/8] fast-import: directly use strbufs for paths Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 3/8] fast-import: allow unquoted empty path for root Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 4/8] fast-import: remove dead strbuf Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 5/8] fast-import: improve documentation for path quoting Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 6/8] fast-import: document C-style escapes for paths Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 7/8] fast-import: forbid escaped NUL in paths Thalia Archibald
2024-04-12 8:03 ` [PATCH v4 8/8] fast-import: make comments more precise Thalia Archibald
2024-04-14 1:11 ` Thalia Archibald [this message]
2024-04-14 1:11 ` [PATCH v5 1/8] fast-import: tighten path unquoting Thalia Archibald
2024-04-14 1:11 ` [PATCH v5 2/8] fast-import: directly use strbufs for paths Thalia Archibald
2024-04-14 1:11 ` [PATCH v5 3/8] fast-import: allow unquoted empty path for root Thalia Archibald
2024-04-14 1:11 ` [PATCH v5 4/8] fast-import: remove dead strbuf Thalia Archibald
2024-04-14 1:12 ` [PATCH v5 5/8] fast-import: improve documentation for path quoting Thalia Archibald
2024-04-14 1:12 ` [PATCH v5 6/8] fast-import: document C-style escapes for paths Thalia Archibald
2024-04-14 1:12 ` [PATCH v5 7/8] fast-import: forbid escaped NUL in paths Thalia Archibald
2024-04-14 1:12 ` [PATCH v5 8/8] fast-import: make comments more precise Thalia Archibald
2024-04-15 7:06 ` [PATCH v5 0/8] fast-import: tighten parsing of paths Patrick Steinhardt
2024-04-15 17:07 ` Junio C Hamano
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