|
c1577110
|
2018-07-05T13:30:46
|
|
delta: fix overflow when computing limit
When checking whether a delta base offset and length fit into the base
we have in memory already, we can trigger an overflow which breaks the
check. This would subsequently result in us reading memory from out of
bounds of the base.
The issue is easily fixed by checking for overflow when adding `off` and
`len`, thus guaranteeting that we are never indexing beyond `base_len`.
This corresponds to the git patch 8960844a7 (check patch_delta bounds
more carefully, 2006-04-07), which adds these overflow checks.
Reported-by: Riccardo Schirone <rschiron@redhat.com>
|
|
|
9844d38b
|
2018-06-29T09:11:02
|
|
delta: fix out-of-bounds read of delta
When computing the offset and length of the delta base, we repeatedly
increment the `delta` pointer without checking whether we have advanced
past its end already, which can thus result in an out-of-bounds read.
Fix this by repeatedly checking whether we have reached the end. Add a
test which would cause Valgrind to produce an error.
Reported-by: Riccardo Schirone <rschiron@redhat.com>
Test-provided-by: Riccardo Schirone <rschiron@redhat.com>
|
|
|
3f461902
|
2018-06-29T07:45:18
|
|
delta: fix sign-extension of big left-shift
Our delta code was originally adapted from JGit, which itself adapted it
from git itself. Due to this heritage, we inherited a bug from git.git
in how we compute the delta offset, which was fixed upstream in
48fb7deb5 (Fix big left-shifts of unsigned char, 2009-06-17). As
explained by Linus:
Shifting 'unsigned char' or 'unsigned short' left can result in sign
extension errors, since the C integer promotion rules means that the
unsigned char/short will get implicitly promoted to a signed 'int' due to
the shift (or due to other operations).
This normally doesn't matter, but if you shift things up sufficiently, it
will now set the sign bit in 'int', and a subsequent cast to a bigger type
(eg 'long' or 'unsigned long') will now sign-extend the value despite the
original expression being unsigned.
One example of this would be something like
unsigned long size;
unsigned char c;
size += c << 24;
where despite all the variables being unsigned, 'c << 24' ends up being a
signed entity, and will get sign-extended when then doing the addition in
an 'unsigned long' type.
Since git uses 'unsigned char' pointers extensively, we actually have this
bug in a couple of places.
In our delta code, we inherited such a bogus shift when computing the
offset at which the delta base is to be found. Due to the sign extension
we can end up with an offset where all the bits are set. This can allow
an arbitrary memory read, as the addition in `base_len < off + len` can
now overflow if `off` has all its bits set.
Fix the issue by casting the result of `*delta++ << 24UL` to an unsigned
integer again. Add a test with a crafted delta that would actually
succeed with an out-of-bounds read in case where the cast wouldn't
exist.
Reported-by: Riccardo Schirone <rschiron@redhat.com>
Test-provided-by: Riccardo Schirone <rschiron@redhat.com>
|
|
|
7392799d
|
2018-05-30T08:35:06
|
|
submodule: detect duplicated submodule paths
When loading submodule names, we build a map of submodule paths and
their respective names. While looping over the configuration keys,
we do not check though whether a submodule path was seen already. This
leads to a memory leak in case we have multiple submodules with the same
path, as we just overwrite the old value in the map in that case.
Fix the error by verifying that the path to be added is not yet part of
the string map. Git does not allow to have multiple submodules for a
path anyway, so we now do the same and detect this duplication,
reporting it to the user.
|
|
|
f2e5c092
|
2018-04-27T15:31:43
|
|
cmake: remove now-useless LIBGIT2_LIBDIRS handling
With the recent change of always resolving pkg-config libraries to their
full path, we do not have to manage the LIBGIT2_LIBDIRS variable
anymore. The only other remaining user of LIBGIT2_LIBDIRS is winhttp,
which is a CMake-style library target and can thus be resolved by CMake
automatically.
Remove the variable to simplify our build system a bit.
|
|
|
0c8ff50f
|
2018-04-27T10:38:49
|
|
cmake: resolve libraries found by pkg-config
Libraries found by CMake modules are usually handled with their full
path. This makes linking against those libraries a lot more robust when
it comes to libraries in non-standard locations, as otherwise we might
mix up libraries from different locations when link directories are
given.
One excemption are libraries found by PKG_CHECK_MODULES. Instead of
returning libraries with their complete path, it will return the
variable names as well as a set of link directories. In case where
multiple sets of the same library are installed in different locations,
this can lead the compiler to link against the wrong libraries in the
end, when link directories of other dependencies are added.
To fix this shortcoming, we need to manually resolve library paths
returned by CMake against their respective library directories. This is
an easy task to do with `FIND_LIBRARY`.
|
|
a137cdbd
|
2018-04-18T21:41:44
|
|
refspec: check for valid parameters in git_refspec__dwim_one
CID:1383993, "In git_refspec__dwim_one: All paths that lead to this null pointer comparison already dereference the pointer earlier (CWE-476)"
|
|
|
7fa6c8ce
|
2018-03-29T10:18:51
|
|
util: fix missing headers for MinGW environments
There are multiple references to undefined functions in the Microsoft
builds. Add headers to make them known.
|
|
0f09d9f5
|
2018-04-02T20:00:07
|
|
Fix build with LibreSSL 2.7
LibreSSL 2.7 adds OpenSSL 1.1 API
Signed-off-by: Bernard Spil <brnrd@FreeBSD.org>
|
|
16b62dd4
|
2018-04-04T21:28:31
|
|
diff: Add missing GIT_DELTA_TYPECHANGE -> 'T' mapping.
This adds the 'T' status character to git_diff_status_char() for diff
entries that change type.
|
|
|
07011e60
|
2018-04-12T13:32:27
|
|
revwalk: fix uninteresting revs sometimes not limiting graphwalk
When we want to limit our graphwalk, we use the heuristic of checking
whether the newest limiting (uninteresting) revision is newer than the
oldest interesting revision. We do so by inspecting whether the first
item's commit time of the user-supplied list of revisions is newer than
the last added interesting revision. This is wrong though, as the user
supplied list is in no way guaranteed to be sorted by increasing commit
dates. This could lead us to abort the revwalk early before applying all
relevant limiting revisions, outputting revisions which should in fact
have been hidden.
Fix the heuristic by instead checking whether _any_ of the limiting
commits was made earlier than the last interesting commit. Add a test.
|
|
|
b2f3ff56
|
2018-04-19T01:08:18
|
|
worktree: fix calloc of the wrong object type
|
|
0f88adb6
|
2018-02-08T12:36:47
|
|
Submodule API should report .gitmodules parse errors
Signed-off-by: Sven Strickroth <email@cs-ware.de>
|
|
|
8fa0b34b
|
2018-04-19T01:05:05
|
|
local: fix a leaking reference when iterating over a symref
Valgrind log :
==17702== 18 bytes in 1 blocks are indirectly lost in loss record 69 of 1,123
==17702== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==17702== by 0x5FDBB49: strdup (strdup.c:42)
==17702== by 0x632B3E: git__strdup (util.h:106)
==17702== by 0x632D2C: git_reference__alloc_symbolic (refs.c:64)
==17702== by 0x62E0AF: loose_lookup (refdb_fs.c:408)
==17702== by 0x62E636: refdb_fs_backend__iterator_next (refdb_fs.c:565)
==17702== by 0x62CD8E: git_refdb_iterator_next (refdb.c:147)
==17702== by 0x6347F2: git_reference_next (refs.c:838)
==17702== by 0x6345CB: git_reference_foreach (refs.c:748)
==17702== by 0x66BE62: local_download_pack (local.c:579)
==17702== by 0x5DB48F: git_fetch_download_pack (fetch.c:148)
==17702== by 0x639028: git_remote_download (remote.c:932)
==17702== by 0x63919A: git_remote_fetch (remote.c:969)
==17702== by 0x4ABEDD: test_fetchhead_nonetwork__fetch_into_repo_with_symrefs (nonetwork.c:362)
==17702== by 0x4125D9: clar_run_test (clar.c:222)
==17702== by 0x41287C: clar_run_suite (clar.c:286)
==17702== by 0x412DDE: clar_test_run (clar.c:433)
==17702== by 0x4105E1: main (main.c:24)
|
|
|
2fe887e6
|
2018-04-18T20:57:16
|
|
remote: repo is optional here
As per CID:1378747, we might be called with a NULL repo, which would be deferenced in write_add_refspec
|
|
|
96329606
|
2018-03-11T15:35:56
|
|
worktree: Read worktree specific reflog for HEAD
Signed-off-by: Sven Strickroth <email@cs-ware.de>
|
|
|
b89988c7
|
2018-03-27T15:03:15
|
|
transports: ssh: replace deprecated function `libssh2_session_startup`
The function `libssh2_session_startup` has been deprecated since libssh2
version 1.2.8 in favor of `libssh2_session_handshake` introduced in the
same version. libssh2 1.2.8 was released in April 2011, so it is already
seven years old. It is available in Debian Wheezy, Ubuntu Trusty and
CentOS 7.4, so the most important and conservative distros already have
it available. As such, it seems safe to just use the new function.
|
|
|
b2e7d8c2
|
2018-03-27T14:49:21
|
|
transports: ssh: disconnect session before freeing it
The function `ssh_stream_free` takes over the responsibility of closing
channels and streams just before freeing their memory, but it does not
do so for the session. In fact, we never disconnect the session
ourselves at all, as libssh2 will not do so itself upon freeing the
structure. Quoting the documentation of `libssh2_session_free`:
> Frees all resources associated with a session instance. Typically
> called after libssh2_session_disconnect_ex,
The missing disconnect probably stems from a misunderstanding what it
actually does. As we are already closing the TCP socket ourselves, the
assumption was that no additional disconnect is required. But calling
`libssh2_session_disconnect` will notify the server that we are cleanly
closing the connection, such that the server can free his own resources.
Add a call to `libssh2_session_disconnect` to fix that issue.
[1]: https://www.libssh2.org/libssh2_session_free.html
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|
|
e2a80124
|
2018-04-10T21:16:43
|
|
refs: preserve the owning refdb when duping reference
This fixes a segfault in git_reference_owner on references returned from git_reference__read_head and git_reference_dup ones.
|
|
|
b260fdc8
|
2018-04-06T12:24:10
|
|
attr_file: fix handling of directory patterns with trailing spaces
When comparing whether a path matches a directory rule, we pass the
both the path and directory name to `fnmatch` with
`GIT_ATTR_FNMATCH_DIRECTORY` being set. `fnmatch` expects the pattern to
contain no trailing directory '/', which is why we try to always strip
patterns of trailing slashes. We do not handle that case correctly
though when the pattern itself has trailing spaces, causing the match to
fail.
Fix the issue by stripping trailing spaces and tabs for a rule previous
to checking whether the pattern is a directory pattern with a trailing
'/'. This replaces the whitespace-stripping in our ignore file parsing
code, which was stripping whitespaces too late. Add a test to catch
future breakage.
|
|
|
a714e836
|
2018-04-06T10:39:16
|
|
transports: local: fix assert when fetching into repo with symrefs
When fetching into a repository which has symbolic references via the
"local" transport we run into an assert. The assert is being triggered
while we negotiate the packfile between the two repositories. When
hiding known revisions from the packbuilder revwalk, we unconditionally
hide all references of the local refdb. In case one of these references
is a symbolic reference, though, this means we're trying to hide a
`NULL` OID, which triggers the assert.
Fix the issue by only hiding OID references from the revwalk. Add a test
to catch this issue in the future.
|
|
|
59012bf4
|
2018-03-29T09:15:48
|
|
odb: mempack: fix leaking objects when freeing mempacks
When a ODB mempack gets free'd, we take no measures at all to free its
contents, most notably the objects added to the database, resulting in a
memory leak. Call `git_mempack_reset` previous to freeing the ODB
structures themselves, which takes care of releasing all associated
data structures.
|
|
4d4a7dbf
|
2018-03-28T17:37:39
|
|
sha1dc: update to fix errors with endianess
This updates the version of SHA1DC to c3e1304ea3.
|
|
cfed1be8
|
2018-05-24T20:28:36
|
|
submodule: plug leaks from the escape detection
|
|
|
f650153a
|
2018-05-24T19:05:59
|
|
submodule: replace index with strchr which exists on Windows
|
|
|
a3df20cf
|
2018-05-24T19:00:13
|
|
submodule: the repostiory for _name_is_valid should not be const
We might modify caches due to us trying to load the configuration to figure out
what kinds of filesystem protections we should have.
|
|
|
a9e60994
|
2018-05-23T08:40:17
|
|
path: check for a symlinked .gitmodules in fs-agnostic code
We still compare case-insensitively to protect more thoroughly as we don't know
what specifics we'll see on the system and it's the behaviour from git.
|
|
|
aa003557
|
2018-05-22T16:13:47
|
|
path: reject .gitmodules as a symlink
Any part of the library which asks the question can pass in the mode to have it
checked against `.gitmodules` being a symlink.
This is particularly relevant for adding entries to the index from the worktree
and for checking out files.
|
|
|
08d4b459
|
2018-05-22T15:48:38
|
|
index: stat before creating the entry
This is so we have it available for the path validity checking. In a later
commit we will start rejecting `.gitmodules` files as symlinks.
|
|
|
c7cac088
|
2018-05-22T15:21:08
|
|
path: accept the name length as a parameter
We may take in names from the middle of a string so we want the caller to let us
know how long the path component is that we should be checking.
|
|
|
d7ee21ee
|
2018-05-22T13:58:24
|
|
path: expose dotgit detection functions per filesystem
These will be used by the checkout code to detect them for the particular
filesystem they're on.
|
|
f907a6f5
|
2018-05-18T15:16:53
|
|
path: hide the dotgit file functions
These can't go into the public API yet as we don't want to introduce API or ABI
changes in a security release.
|
|
|
0cc14627
|
2018-05-16T15:56:04
|
|
path: add functions to detect .gitconfig and .gitattributes
|
|
|
26b3cec0
|
2018-05-16T15:42:08
|
|
path: add a function to detect an .gitmodules file
Given a path component it knows what to pass to the filesystem-specific
functions so we're protected even from trees which try to use the 8.3 naming
rules to get around us matching on the filename exactly.
The logic and test strings come from the equivalent git change.
|
|
|
dd364dde
|
2018-05-16T14:47:04
|
|
path: provide a generic function for checking dogit files on NTFS
It checks against the 8.3 shortname variants, including the one which includes
the checksum as part of its name.
|
|
|
37dc60b6
|
2018-05-16T11:56:04
|
|
path: provide a generic dogit checking function for HFS
This lets us check for other kinds of reserved files.
|
|
|
916af8ea
|
2018-05-14T16:03:15
|
|
submodule: also validate Windows-separated paths for validity
Otherwise we would also admit `..\..\foo\bar` as a valid path and fail to
protect Windows users.
Ideally we would check for both separators without the need for the copied
string, but this'll get us over the RCE.
|
|
|
e6c757a7
|
2018-04-30T13:47:15
|
|
submodule: ignore submodules which include path traversal in their name
If the we decide that the "name" of the submodule (i.e. its path inside
`.git/modules/`) is trying to escape that directory or otherwise trick us, we
ignore the configuration for that submodule.
This leaves us with a half-configured submodule when looking it up by path, but
it's the same result as if the configuration really were missing.
The name check is potentially more strict than it needs to be, but it lets us
re-use the check we're doing for the checkout. The function that encapsulates
this logic is ready to be exported but we don't want to do that in a security
release so it remains internal for now.
|
|
|
a52b4c51
|
2018-03-23T09:59:46
|
|
odb: fix writing to fake write streams
In commit 7ec7aa4a7 (odb: assert on logic errors when writing objects,
2018-02-01), the check for whether we are trying to overflowing the fake
stream buffer was changed from returning an error to raising an assert.
The conversion forgot though that the logic around `assert`s are
basically inverted. Previously, if the statement
stream->written + len > steram->size
evaluated to true, we would return a `-1`. Now we are asserting that
this statement is true, and in case it is not we will raise an error. So
the conversion to the `assert` in fact changed the behaviour to the
complete opposite intention.
Fix the assert by inverting its condition again and add a regression
test.
|
|
0e4f3d9d
|
2018-03-03T21:47:22
|
|
gitno_extract_url_parts: decode hostnames
RFC 3986 says that hostnames can be percent encoded. Percent decode
hostnames in our URLs.
|
|
|
05551ca0
|
2018-03-03T20:14:54
|
|
Remove now unnecessary `gitno_unescape`
|
|
|
60e7848e
|
2018-03-03T20:13:30
|
|
gitno_extract_url_parts: use `git_buf`s
Now that we can decode percent-encoded strings as part of `git_buf`s,
use that decoder in `gitno_extract_url_parts`.
|
|
|
6f577906
|
2018-03-03T20:09:09
|
|
ssh urls: use `git_buf_decode_percent`
Use `git_buf_decode_percent` so that we can avoid allocating a temporary
buffer.
|
|
|
8070a357
|
2018-03-03T18:47:35
|
|
Introduce `git_buf_decode_percent`
Introduce a function to take a percent-encoded string (URI encoded,
described by RFC 1738) and decode it into a `git_buf`.
|
|
16210877
|
2018-02-28T12:59:47
|
|
Unescape repo before constructing ssh request
|
|
|
8a2cdbd3
|
2018-02-28T12:58:58
|
|
Rename unescape and make non-static
|
|
|
3db1af1f
|
2018-03-08T12:36:46
|
|
index: error out on unreasonable prefix-compressed path lengths
When computing the complete path length from the encoded
prefix-compressed path, we end up just allocating the complete path
without ever checking what the encoded path length actually is. This can
easily lead to a denial of service by just encoding an unreasonable long
path name inside of the index. Git already enforces a maximum path
length of 4096 bytes. As we also have that enforcement ready in some
places, just make sure that the resulting path is smaller than
GIT_PATH_MAX.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
|
3207ddb0
|
2018-03-08T12:00:27
|
|
index: fix out-of-bounds read with invalid index entry prefix length
The index format in version 4 has prefix-compressed entries, where every
index entry can compress its path by using a path prefix of the previous
entry. Since implmenting support for this index format version in commit
5625d86b9 (index: support index v4, 2016-05-17), though, we do not
correctly verify that the prefix length that we want to reuse is
actually smaller or equal to the amount of characters than the length of
the previous index entry's path. This can lead to a an integer underflow
and subsequently to an out-of-bounds read.
Fix this by verifying that the prefix is actually smaller than the
previous entry's path length.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
|
58a6fe94
|
2018-03-08T11:49:19
|
|
index: convert `read_entry` to return entry size via an out-param
The function `read_entry` does not conform to our usual coding style of
returning stuff via the out parameter and to use the return value for
reporting errors. Due to most of our code conforming to that pattern, it
has become quite natural for us to actually return `-1` in case there is
any error, which has also slipped in with commit 5625d86b9 (index:
support index v4, 2016-05-17). As the function returns an `size_t` only,
though, the return value is wrapped around, causing the caller of
`read_tree` to continue with an invalid index entry. Ultimately, this
can lead to a double-free.
Improve code and fix the bug by converting the function to return the
index entry size via an out parameter and only using the return value to
indicate errors.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
53e692af
|
2018-03-02T12:49:54
|
|
worktree: rename parameter creason to reason
|
|
|
12356076
|
2018-03-02T12:41:04
|
|
worktree: lock reason should be const
|
|
|
8a8ea1db
|
2018-02-28T18:14:52
|
|
Merge pull request #4552 from libgit2/cmn/config-header-common
Cast less blindly between configuration objects
|
|
|
e8e490b2
|
2018-02-28T17:01:47
|
|
Merge pull request #4554 from pks-t/pks/curl-init
curl: initialize and cleanup global curl state
|
|
|
9cd0c6f1
|
2018-02-28T16:01:16
|
|
config: return an error if config_refresh is called on a snapshot
Instead of treating it as a no-op, treat it as a programming error and return
the same kind of error as if you called to set or delete variables on a
snapshot.
|
|
|
2022b004
|
2018-02-28T12:06:59
|
|
curl: explicitly initialize and cleanup global curl state
Our curl-based streams make use of the easy curl interface. This
interface automatically initializes and de-initializes the global curl
state by calling out to `curl_global_init` and `curl_global_cleanup`.
Thus, all global state will be repeatedly re-initialized when creating
multiple curl streams in succession. Despite being inefficient, this is
not thread-safe due to `curl_global_init` being not thread-safe itself.
Thus a multi-threaded programing handling multiple curl streams at the
same time is inherently racy.
Fix the issue by globally initializing and cleaning up curl's state.
|
|
|
a33deeb4
|
2018-02-28T12:20:23
|
|
win32: strncmp -> git__strncmp
The win32 C library is compiled cdecl, however when configured with
`STDCALL=ON`, our functions (and function pointers) will use the stdcall
calling convention. You cannot set a `__stdcall` function pointer to a
`__cdecl` function, so it's easier to just use our `git__strncmp`
instead of sorting that mess out.
|
|
|
2424e64c
|
2018-02-28T12:06:02
|
|
config: harden our use of the backend objects a bit
When we create an iterator we don't actually know that we have a live config
object and we must instead only rely on the header. We fixed it to use this in a
previous commit, but this makes it harder to misuse by converting to use the
header object in the typecast.
We also guard inside the `config_refresh` function against being given a
snapshot (although callers right now do check).
|
|
|
1785de4e
|
2018-02-28T11:46:17
|
|
config: move the level field into the header
We use it in a few places where we might have a full object or a snapshot so
move it to where we can actually access it.
|
|
|
c1524b2e
|
2018-02-28T11:33:11
|
|
config: move the repository to the diskfile header
We pass this around and when creating a new iterator we need to read the
repository pointer.
Put it in a common place so we can reach it regardless of whether we got a full
object or a snapshot.
|
|
|
c9d59c61
|
2018-02-27T12:45:21
|
|
Merge pull request #4545 from libgit2/ethomson/checkout_filemode
Respect core.filemode in checkout
|
|
|
5ecb6220
|
2018-02-25T15:46:51
|
|
winhttp: enable TLS 1.2 on Windows 7 and earlier
Versions of Windows prior to Windows 8 do not enable TLS 1.2 by default,
though support may exist. Try to enable TLS 1.2 support explicitly on
connections.
This request may fail if the operating system does not have TLS 1.2
support - the initial release of Vista lacks TLS 1.2 support (though
it is available as a software update) and XP completely lacks TLS 1.2
support. If this request does fail, the HTTP context is still valid,
and still maintains the original protocol support. So we ignore the
failure from this operation.
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934e6a3b
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2018-02-27T11:24:30
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winhttp: include constants for TLS 1.1/1.2 support
For platforms that do not define `WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1`
and/or `WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2`.
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8c8db980
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2018-02-27T10:32:29
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mingw: update TLS option flags
Include the constants for `WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1` and
`WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2` so that they can be used by mingw.
This updates both the `deps/winhttp` framework (for classic mingw) and
adds the defines for mingw64, which does not use that framework.
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c214ba19
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2018-02-20T00:35:27
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checkout: respect core.filemode when comparing filemodes
Fixes #4504
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894ccf4b
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2018-02-20T16:14:54
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Merge pull request #4535 from libgit2/ethomson/checkout_typechange_with_index_and_wd
checkout: when examining index (instead of workdir), also examine mode
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ce7080a0
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2018-02-20T10:38:27
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diff_tform: fix rename detection with rewrite/delete pair
A rewritten file can either be classified as a modification of its
contents or of a delete of the complete file followed by an addition of
the new content. This distinction becomes important when we want to
detect renames for rewrites. Given a scenario where a file "a" has been
deleted and another file "b" has been renamed to "a", this should be
detected as a deletion of "a" followed by a rename of "a" -> "b". Thus,
splitting of the original rewrite into a delete/add pair is important
here.
This splitting is represented by a flag we can set at the current delta.
While the flag is already being set in case we want to break rewrites,
we do not do so in case where the `GIT_DIFF_FIND_RENAMES_FROM_REWRITES`
flag is set. This can trigger an assert when we try to match the source
and target deltas.
Fix the issue by setting the `GIT_DIFF_FLAG__TO_SPLIT` flag at the delta
when it is a rename target and `GIT_DIFF_FIND_RENAMES_FROM_REWRITES` is
set.
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d7fea1e1
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2018-02-18T16:10:33
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checkout: take mode into account when comparing index to baseline
When checking out a file, we determine whether the baseline (what we
expect to be in the working directory) actually matches the contents
of the working directory. This is safe behavior to prevent us from
overwriting changes in the working directory.
We look at the index to optimize this test: if we know that the index
matches the working directory, then we can simply look at the index
data compared to the baseline.
We have historically compared the baseline to the index entry by oid.
However, we must also compare the mode of the two items to ensure that
they are identical. Otherwise, we will refuse to update the working
directory for a mode change.
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f1ad004c
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2018-02-18T22:29:48
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Merge pull request #4529 from libgit2/ethomson/index_add_requires_files
git_index_add_frombuffer: only accept files/links
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5f774dbf
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2018-02-11T10:14:13
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git_index_add_frombuffer: only accept files/links
Ensure that the buffer given to `git_index_add_frombuffer` represents a
regular blob, an executable blob, or a link. Explicitly reject commit
entries (submodules) - it makes little sense to allow users to add a
submodule from a string; there's no possible path to success.
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92324d84
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2018-02-16T11:28:53
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util: clean up header includes
While "util.h" declares the macro `git__tolower`, which simply resorts
to tolower(3P) on Unix-like systems, the <ctype.h> header is only being
included in "util.c". Thus, anybody who has included "util.h" without
having <ctype.h> included will fail to compile as soon as the macro is
in use.
Furthermore, we can clean up additional includes in "util.c" and simply
replace them with an include for "common.h".
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06b8a40f
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2018-02-16T11:29:46
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Explicitly mark fallthrough cases with comments
A lot of compilers nowadays generate warnings when there are cases in a
switch statement which implicitly fall through to the next case. To
avoid this warning, the last line in the case that is falling through
can have a comment matching a regular expression, where one possible
comment body would be `/* fall through */`.
An alternative to the comment would be an explicit attribute like e.g.
`[[clang::fallthrough]` or `__attribute__ ((fallthrough))`. But GCC only
introduced support for such an attribute recently with GCC 7. Thus, and
also because the fallthrough comment is supported by most compilers, we
settle for using comments instead.
One shortcoming of that method is that compilers are very strict about
that. Most interestingly, that comment _really_ has to be the last line.
In case a closing brace follows the comment, the heuristic will fail.
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7c6e9175
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2018-02-16T11:11:11
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index: shut up warning on uninitialized variable
Even though the `entry` variable will always be initialized when
`read_entry` returns success and even though we never dereference
`entry` in case `read_entry` fails, GCC prints a warning about
uninitialized use. Just initialize the pointer to `NULL` in order to
shut GCC up.
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84f03b3a
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2018-02-16T10:48:55
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streams: openssl: fix use of uninitialized variable
When verifying the server certificate, we do try to make sure that the
hostname actually matches the certificate alternative names. In cases
where the host is either an IPv4 or IPv6 address, we have to compare the
binary representations of the hostname with the declared IP address of
the certificate. We only do that comparison in case we were successfully
able to parse the hostname as an IP, which would always result in the
memory region being initialized. Still, GCC 6.4.0 was complaining about
usage of non-initialized memory.
Fix the issue by simply asserting that `addr` needs to be initialized.
This shuts up the GCC warning.
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ee6be190
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2018-01-31T08:36:19
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http: standardize user-agent addition
The winhttp and posix http each need to add the user-agent to their
requests. Standardize on a single function to include this so that we
do not get the version numbers we're sending out of sync.
Assemble the complete user agent in `git_http__user_agent`, returning
assembled strings.
Co-authored-by: Patrick Steinhardt <ps@pks.im>
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178fda8a
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2018-02-09T17:55:18
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hash: win32: fix missing comma in `giterr_set`
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638c6b8c
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2018-02-09T17:32:15
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odb_loose: only close file descriptor if it was opened successfully
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a43bcd2c
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2018-02-09T17:31:50
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odb: fix memory leaks due to not freeing hash context
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9985edb5
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2018-02-01T06:32:55
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hash: set error messages on failure
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619f61a8
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2018-02-01T06:22:36
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odb: error when we can't create object header
Return an error to the caller when we can't create an object header for
some reason (printf failure) instead of simply asserting.
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7ec7aa4a
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2018-02-01T05:54:57
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odb: assert on logic errors when writing objects
There's no recovery possible if we're so confused or corrupted that
we're trying to overwrite our memory. Simply assert.
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138e4c2b
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2018-02-01T06:35:31
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git_odb__hashfd: propagate error on failures
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35ed256b
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2018-02-01T05:11:05
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git_odb__hashobj: provide errors messages on failures
Provide error messages on hash failures: assert when given invalid
input instead of failing with a user error; provide error messages
on program errors.
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59d99adc
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2018-01-31T09:34:52
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odb: check for alloc errors on hardcoded objects
It's unlikely that we'll fail to allocate a single byte, but let's check
for allocation failures for good measure. Untangle `-1` being a marker
of not having found the hardcoded odb object; use that to reflect actual
errors.
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ef902864
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2018-01-31T09:30:51
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odb: error when we can't alloc an object
At the moment, we're swallowing the allocation failure. We need to
return the error to the caller.
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0fd0bfe4
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2018-02-08T22:51:46
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Merge pull request #4450 from libgit2/ethomson/odb_loose_readstream
Streaming read support for the loose ODB backend
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d749822c
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2018-02-08T22:50:58
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Merge pull request #4491 from libgit2/ethomson/recursive
Recursive merge: reverse the order of merge bases
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ba4faf6e
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2018-02-08T17:15:33
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buf_text: remove `offset` parameter of BOM detection function
The function to detect a BOM takes an offset where it shall look for a
BOM. No caller uses that, and searching for the BOM in the middle of a
buffer seems to be very unlikely, as a BOM should only ever exist at
file start.
Remove the parameter, as it has already caused confusion due to its
weirdness.
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2eea5f1c
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2018-02-08T10:27:31
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config_parse: fix reading files with BOM
The function `skip_bom` is being used to detect and skip BOM marks
previously to parsing a configuration file. To do so, it simply uses
`git_buf_text_detect_bom`. But since the refactoring to use the parser
interface in commit 9e66590bd (config_parse: use common parser
interface, 2017-07-21), the BOM detection was actually broken.
The issue stems from a misunderstanding of `git_buf_text_detect_bom`. It
was assumed that its third parameter limits the length of the character
sequence that is to be analyzed, while in fact it was an offset at which
we want to detect the BOM. Fix the parameter to be `0` instead of the
buffer length, as we always want to check the beginning of the
configuration file.
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848153f3
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2018-02-08T10:02:29
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config_parse: handle empty lines with CRLF
Currently, the configuration parser will fail reading empty lines with
just an CRLF-style line ending. Special-case the '\r' character in order
to handle it the same as Unix-style line endings. Add tests to spot this
regression in the future.
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5340ca77
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2018-02-08T09:31:51
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config_parse: add comment to clarify logic getting next character
Upon each line, the configuration parser tries to get either the first
non-whitespace character or the first whitespace character, in case
there is no non-whitespace character. The logic handling this looks
rather odd and doesn't immediately convey this meaning, so add a comment
to clarify what happens.
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1403c612
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2018-01-22T14:44:31
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merge: virtual commit should be last argument to merge-base
Our virtual commit must be the last argument to merge-base: since our
algorithm pushes _both_ parents of the virtual commit, it needs to be
the last argument, since merge-base:
> Given three commits A, B and C, git merge-base A B C will compute the
> merge base between A and a hypothetical commit M
We want to calculate the merge base between the actual commit ("two")
and the virtual commit ("one") - since one actually pushes its parents
to the merge-base calculation, we need to calculate the merge base of
"two" and the parents of one.
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b924df1e
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2018-01-21T18:05:45
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merge: reverse merge bases for recursive merge
When the commits being merged have multiple merge bases, reverse the
order when creating the virtual merge base. This is for compatibility
with git's merge-recursive algorithm, and ensures that we build
identical trees.
Git does this to try to use older merge bases first. Per 8918b0c:
> It seems to be the only sane way to do it: when a two-head merge is
> done, and the merge-base and one of the two branches agree, the
> merge assumes that the other branch has something new.
>
> If we start creating virtual commits from newer merge-bases, and go
> back to older merge-bases, and then merge with newer commits again,
> chances are that a patch is lost, _because_ the merge-base and the
> head agree on it. Unlikely, yes, but it happened to me.
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ed51feb7
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2018-01-21T18:01:20
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oidarray: introduce git_oidarray__reverse
Provide a simple function to reverse an oidarray.
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26f5d36d
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2018-02-04T10:27:39
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Merge pull request #4489 from libgit2/ethomson/conflicts_crlf
Conflict markers should match EOL style in conflicting files
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8abd514c
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2018-02-02T17:37:12
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Merge pull request #4499 from pks-t/pks/setuid-config
sysdir: do not use environment in setuid case
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2553cbe3
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2018-02-02T11:33:46
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Merge pull request #4512 from libgit2/ethomson/header_guards
Consistent header guards
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53454b68
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2018-02-02T11:31:15
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Merge pull request #4510 from pks-t/pks/attr-file-bare-stat
attr: avoid stat'ting files for bare repositories
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0967459e
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2018-01-25T13:11:34
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sysdir: do not use environment in setuid case
In order to derive the location of some Git directories, we currently
use the environment variables $HOME and $XDG_CONFIG_HOME. This might
prove to be problematic whenever the binary is run with setuid, that is
when the effective user does not equal the real user. In case the
environment variables do not get sanitized by the caller, we thus might
end up using the real user's configuration when doing stuff as the
effective user.
The fix is to use the passwd entry's directory instead of $HOME in this
situation. As this might break scenarios where the user explicitly sets
$HOME to another path, this fix is only applied in case the effective
user does not equal the real user.
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09df354e
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2018-02-01T16:52:43
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odb_loose: HEADER_LEN -> MAX_HEADER_LEN
`MAX_HEADER_LEN` is a more descriptive constant name.
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624614b2
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2017-12-19T00:43:49
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odb_loose: validate length when checking for zlib content
When checking to see if a file has zlib deflate content, make sure that
we actually have read at least two bytes before examining the array.
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