|
2dc7b5ef
|
2019-12-14T12:53:04
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|
tests: pack: add missing asserts around `git_packbuilder_write`
|
|
|
11e8ee1f
|
2020-01-06T15:41:18
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|
tests: submodule: verify setup of relative URLs
When setting up relative URLs for a submodule, then we resolve it to
the actual location and write that into ".git/config" instead of
writing the relative value. We do not yet have a test to nail down this
behaviour, which is now being added by this commit.
|
|
|
2f6f10bb
|
2019-12-13T13:35:40
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|
Merge pull request #5300 from tiennou/fix/branch-documentation
branch: clarify documentation around branches
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|
97b8491b
|
2019-12-08T15:25:52
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|
refs: rename git_reference__set_name to git_reference__realloc
As git_reference__name will reallocate storage to account for longer
names (it's actually allocator-dependent), it will cause all existing
pointers to the old object to become dangling, as they now point to
freed memory.
Fix the issue by renaming to a more descriptive name, and pass a pointer
to the actual reference that can safely be invalidated if the realloc
succeeds.
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b3178587
|
2019-12-13T08:35:25
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|
Merge pull request #5333 from lrm29/attr_binary_macro
attr: Update definition of binary macro
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|
cf286d5e
|
2019-12-12T10:58:56
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attr: Update definition of binary macro
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14ff3516
|
2019-12-03T23:15:47
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|
path: support non-ascii drive letters on dos
Windows/DOS only supports drive letters that are alpha characters A-Z.
However, you can `subst` any one-character as a drive letter, including
numbers or even emoji. Test that we can identify emoji as drive
letters.
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85d4ff77
|
2019-12-03T19:50:18
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index: ensure that we respect core.protectNTFS=false
Users may want to turn off core.protectNTFS, perhaps to import (and then
repair) a broken tree. Ensure that core.protectNTFS=false is honored.
|
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ba4c769b
|
2019-12-03T23:23:02
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|
tree: ensure we protect NTFS paths everywhere
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e4034dfa
|
2019-12-03T19:24:59
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|
path: protect NTFS everywhere
Enable core.protectNTFS by default everywhere and in every codepath, not
just on checkout.
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d9c0c9cf
|
2019-12-03T19:17:41
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|
test: ensure we can't add a protected path
Test that when we enable core.protectNTFS that we cannot add
platform-specific invalid paths to the index.
|
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72df1cd8
|
2019-12-03T19:01:00
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|
test: improve badname verification test
The name of the `add_invalid_filename` function suggests that we
_want_ to add an invalid filename. Rename the function to show that
we expect to _fail_ to add the invalid filename.
|
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f3b28604
|
2019-12-03T18:57:16
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|
test: ensure treebuilder validate new protection rules
Ensure that the new protection around .git::$INDEX_ALLOCATION rules are
enabled for using the treebuilder when core.protectNTFS is set.
|
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336991db
|
2019-12-03T18:56:31
|
|
test: ensure index adds validate new protection rules
Ensure that the new protection around .git::$INDEX_ALLOCATION rules are
enabled for adding to the index when core.protectNTFS is set.
|
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a3cbd204
|
2019-12-03T18:49:23
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|
test: improve badname verification test
The name of the `write_invalid_filename` function suggests that we
_want_ to write an invalid filename. Rename the function to show that
we expect to _fail_ to write the invalid filename.
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e1832eb2
|
2019-09-18T16:33:18
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|
path: also guard `.gitmodules` against NTFS Alternate Data Streams
We just safe-guarded `.git` against NTFS Alternate Data Stream-related
attack vectors, and now it is time to do the same for `.gitmodules`.
Note: In the added regression test, we refrain from verifying all kinds
of variations between short names and NTFS Alternate Data Streams: as
the new code disallows _all_ Alternate Data Streams of `.gitmodules`, it
is enough to test one in order to know that all of them are guarded
against.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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3f7851ea
|
2019-09-18T14:32:05
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Disallow NTFS Alternate Data Stream attacks, even on Linux/macOS
A little-known feature of NTFS is that it offers to store metadata in
so-called "Alternate Data Streams" (inspired by Apple's "resource
forks") that are copied together with the file they are associated with.
These Alternate Data Streams can be accessed via `<file name>:<stream
name>:<stream type>`.
Directories, too, have Alternate Data Streams, and they even have a
default stream type `$INDEX_ALLOCATION`. Which means that `abc/` and
`abc::$INDEX_ALLOCATION/` are actually equivalent.
This is of course another attack vector on the Git directory that we
definitely want to prevent.
On Windows, we already do this incidentally, by disallowing colons in
file/directory names.
While it looks as if files'/directories' Alternate Data Streams are not
accessible in the Windows Subsystem for Linux, and neither via
CIFS/SMB-mounted network shares in Linux, it _is_ possible to access
them on SMB-mounted network shares on macOS.
Therefore, let's go the extra mile and prevent this particular attack
_everywhere_. To keep things simple, let's just disallow *any* Alternate
Data Stream of `.git`.
This is libgit2's variant of CVE-2019-1352.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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|
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64c612cc
|
2019-09-18T15:25:02
|
|
Protect against 8.3 "short name" attacks also on Linux/macOS
The Windows Subsystem for Linux (WSL) is getting increasingly popular,
in particular because it makes it _so_ easy to run Linux software on
Windows' files, via the auto-mounted Windows drives (`C:\` is mapped to
`/mnt/c/`, no need to set that up manually).
Unfortunately, files/directories on the Windows drives can be accessed
via their _short names_, if that feature is enabled (which it is on the
`C:` drive by default).
Which means that we have to safeguard even our Linux users against the
short name attacks.
Further, while the default options of CIFS/SMB-mounts seem to disallow
accessing files on network shares via their short names on Linux/macOS,
it _is_ possible to do so with the right options.
So let's just safe-guard against short name attacks _everywhere_.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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d29d4de2
|
2019-09-18T15:08:56
|
|
cl_git_fail: do not report bogus error message
When we expect a checkout operation to fail, but it succeeds, we
actually do not want to see the error messages that were generated in
the meantime for errors that were handled gracefully by the code (e.g.
when an object could not be found in a pack: in this case, the next
backend would have been given a chance to look up the object, and
probably would have found it because the checkout succeeded, after all).
Which means that in the specific case of `cl_git_fail()`, we actually
want to clear the global error state _after_ evaluating the command: we
know that any still-available error would be bogus, seeing as the
command succeeded (unexpectedly).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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7f6fdb82
|
2019-12-01T14:11:22
|
|
Merge pull request #5312 from pks-t/pks/patch-base85-overflow
patch_parse: fix out-of-bounds reads caused by integer underflow
|
|
|
7f20778b
|
2019-11-29T09:14:04
|
|
Merge pull request #5311 from pks-t/pks/clar-trace-warning
tests: fix compiler warning if tracing is disabled
|
|
|
361ebbcb
|
2019-11-28T15:36:40
|
|
tests: config: only test parsing huge file with GITTEST_INVASIVE_SPEED
The test in config::stress::huge_section_with_many_values takes quite a
long time to execute. Hide it behind the GITTEST_INVASIVE_SPEED
environment varibale to not needlessly blow up execution time of tests.
As this environment variable is being set by the continuous integration,
we will execute it regularly anyway.
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33e6c402
|
2019-11-28T15:26:36
|
|
patch_parse: fix out-of-bounds reads caused by integer underflow
The patch format for binary files is a simple Base85 encoding with a
length byte as prefix that encodes the current line's length. For each
line, we thus check whether the line's actual length matches its
expected length in order to not faultily apply a truncated patch. This
also acts as a check to verify that we're not reading outside of the
line's string:
if (encoded_len > ctx->parse_ctx.line_len - 1) {
error = git_parse_err(...);
goto done;
}
There is the possibility for an integer underflow, though. Given a line
with a single prefix byte, only, `line_len` will be zero when reaching
this check. As a result, subtracting one from that will result in an
integer underflow, causing us to assume that there's a wealth of bytes
available later on. Naturally, this may result in an out-of-bounds read.
Fix the issue by checking both `encoded_len` and `line_len` for a
non-zero value. The binary format doesn't make use of zero-length lines
anyway, so we need to know that there are both encoded bytes and
remaining characters available at all.
This patch also adds a test that works based on the last error message.
Checking error messages is usually too tightly coupled, but in fact
parsing the patch failed even before the change. Thus the only
possibility is to use e.g. Valgrind, but that'd result in us not
catching issues when run without Valgrind. As a result, using the error
message is considered a viable tradeoff as we know that we didn't start
decoding Base85 in the first place.
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|
|
1d470a71
|
2019-11-28T14:45:15
|
|
tests: fix compiler warning if tracing is disabled
If building libgit2's test suite with tracing disabled, then the
compiler will emit a warning due to the unused `message_prefix`
function. Fix the issue by wrapping the whole file into ifdef's for
`GIT_TRACE` and providing separate empty function implementations for
both `cl_global_trace_register` and `cl_global_trace_disable`.
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|
|
fb439c97
|
2019-11-28T14:41:58
|
|
Merge pull request #5306 from herrerog/patchid
diff: complete support for git patchid
|
|
|
61176a9b
|
2019-11-28T14:31:16
|
|
Merge pull request #5243 from pks-t/pks/config-optimize-mem
Memory optimizations for config entries
|
|
ece5bb5e
|
2019-11-07T14:10:00
|
|
diff: make patchid computation work with all types of commits.
Current implementation of patchid is not computing a correct patchid
when given a patch where, for example, a new file is added or removed.
Some more corner cases need to be handled to have same behavior as git
patch-id command.
Add some more tests to cover those corner cases.
Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
|
|
|
b63ad958
|
2019-11-28T13:19:50
|
|
Merge pull request #5309 from libgit2/ethomson/trace
Improve trace support in tests
|
|
|
0e5243b7
|
2019-11-28T12:42:36
|
|
Merge pull request #5123 from libgit2/ethomson/off_t
Move `git_off_t` to `git_object_size_t`
|
|
|
b7f70bc2
|
2019-11-27T12:36:17
|
|
tests: optionally show test execution tracing
Only show test trace execution when the CLAR_TRACE_TESTS environment
variable is set. This reduces the noise during tracing.
|
|
|
85efe896
|
2019-11-27T12:34:10
|
|
tests: display trace level with prefix in tests
|
|
|
6460e8ab
|
2019-06-23T18:13:29
|
|
internal: use off64_t instead of git_off_t
Prefer `off64_t` internally.
|
|
|
0005c77a
|
2019-11-24T15:49:49
|
|
test: add an azure repos test
We currently talk to Azure Repos for executing an online test
(online::clone::path_whitespace). Add a simpler test to talk to Azure
Repos to make it obvious that strange test failures are not likely the
whitespace in the path, but actually a function of talking to Azure
Repos itself.
|
|
|
048e94ad
|
2019-11-07T14:13:14
|
|
patch_parse: correct parsing of patch containing not shown binary data.
When not shown binary data is added or removed in a patch, patch parser
is currently returning 'error -1 - corrupt git binary header at line 4'.
Fix it by correctly handling case where binary data is added/removed.
Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
|
|
|
de7659cc
|
2019-11-10T18:44:56
|
|
patch_parse: use paths from "---"/"+++" lines for binary patches
For some patches, it is not possible to derive the old and new file
paths from the patch header's first line, most importantly when they
contain spaces. In such a case, we derive both paths from the "---" and
"+++" lines, which allow for non-ambiguous parsing. We fail to use these
paths when parsing binary patches without data, though, as we always
expect the header paths to be filled in.
Fix this by using the "---"/"+++" paths by default and only fall back to
header paths if they aren't set. If neither of those paths are set, we
just return an error. Add two tests to verify this behaviour, one of
which would have previously caused a segfault.
|
|
|
01ea911b
|
2019-11-06T06:04:55
|
|
Merge pull request #5299 from pks-t/pks/config-mem-snapshots
config_mem: implement support for snapshots
|
|
|
146e5bf7
|
2019-11-06T07:27:35
|
|
config_mem: implement support for snapshots
Similar as in commit dadbb33b6 (Fix crash if snapshotting a
config_snapshot, 2019-11-01), let's implement snapshots for in-memory
configuration entries. As this deletes more code than it adds, it
doesn't make any sense to not allow for this and allows users to treat
config backends mostly the same.
|
|
|
de543e29
|
2019-11-05T22:44:27
|
|
patch_parse: fix segfault when header path contains whitespace only
When parsing header paths from a patch, we reject any patches with empty
paths as malformed patches. We perform the check whether a path is empty
before sanitizing it, though, which may lead to a path becoming empty
after the check, e.g. if we have trimmed whitespace. This may lead to a
segfault later when any part of our patching logic actually references
such a path, which may then be a `NULL` pointer.
Fix the issue by performing the check after sanitizing. Add tests to
catch the issue as they would have produced a segfault previosuly.
|
|
|
b7dcea04
|
2019-09-26T15:06:12
|
|
config_entries: micro-optimize storage of multivars
Multivars are configuration entries that have many values for the same
name; we can thus micro-optimize this case by just retaining the name of
the first configuration entry and freeing all the others, letting them
point to the string of the first entry.
The attached test case is an extreme example that demonstrates this. It
contains a section name that is approximately 500kB in size with 20.000
entries "a=b". Without the optimization, this would require at least
20000*500kB bytes, which is around 10GB. With this patch, it only
requires 500kB+20000*1B=20500kB.
The obvious culprit here is the section header, which we repeatedly
include in each of the configuration entry's names. This makes it very
easier for an adversary to provide a small configuration file that
disproportionally blows up in memory during processing and is thus a
feasible way for a denial-of-service attack. Unfortunately, we cannot
fix the root cause by e.g. having a separate "section" field that may
easily be deduplicated due to the `git_config_entry` structure being
part of our public API. So this micro-optimization is the best we can do
for now.
|
|
|
82d7a114
|
2019-11-05T11:18:14
|
|
Merge pull request #5293 from csware/config_snapshot-snapshot
Fix crash if snapshotting a config_snapshot
|
|
|
bf2911d7
|
2019-11-02T07:30:32
|
|
Merge pull request #5275 from pks-t/pks/reflogs-with-newlines
reflogs: fix behaviour around reflogs with newlines
|
|
dadbb33b
|
2019-11-01T18:55:54
|
|
Fix crash if snapshotting a config_snapshot
Signed-off-by: Sven Strickroth <email@cs-ware.de>
|
|
0974e02f
|
2019-10-30T20:35:48
|
|
commit: add failing tests for object checking for git_commit_with_signature
There can be a significant difference between the system where we created the
buffer (if at all) and when the caller provides us with the contents of a
commit.
Provide some test cases (we have to adapt the existing ones because they refer
to trees and commits which do not exist).
|
|
|
2a7d6de3
|
2019-10-29T07:52:31
|
|
Merge pull request #5276 from pks-t/pks/patch-fuzzing-fixes
patch_parse: fixes for fuzzing errors
|
|
|
a31f4c4b
|
2019-10-24T13:16:03
|
|
Merge pull request #5227 from ddevault/check
apply: add GIT_APPLY_CHECK
|
|
|
c405f231
|
2019-10-24T10:26:43
|
|
Merge pull request #5264 from henkesn/refs-unlock-on-commit
refs: unlock unmodified refs on transaction commit
|
|
02af1fcb
|
2019-09-14T14:03:36
|
|
apply: add GIT_APPLY_CHECK
This adds an option which will check if a diff is applicable without
actually applying it; equivalent to git apply --check.
|
|
|
37141ff7
|
2019-10-21T18:56:59
|
|
patch_parse: detect overflow when calculating old/new line position
When the patch contains lines close to INT_MAX, then it may happen that
we end up with an integer overflow when calculating the line of the
current diff hunk. Reject such patches as unreasonable to avoid the
integer overflow.
As the calculation is performed on integers, we introduce two new
helpers `git__add_int_overflow` and `git__sub_int_overflow` that perform
the integer overflow check in a generic way.
|
|
|
468e3ddc
|
2019-10-19T16:48:11
|
|
patch_parse: fix out-of-bounds read with No-NL lines
We've got two locations where we copy lines into the patch. The first
one is when copying normal " ", "-" or "+" lines, while the second
location gets executed when we copy "\ No newline at end of file" lines.
While the first one correctly uses `git__strndup` to copy only until the
newline, the other one doesn't. Thus, if the line occurs at the end of
the patch and if there is no terminating NUL character, then it may
result in an out-of-bounds read.
Fix the issue by using `git__strndup`, as was already done in the other
location. Furthermore, add allocation checks to both locations to detect
out-of-memory situations.
|
|
|
6c6c15e9
|
2019-10-19T15:52:35
|
|
patch_parse: reject empty path names
When parsing patch headers, we currently accept empty path names just
fine, e.g. a line "--- \n" would be parsed as the empty filename. This
is not a valid patch format and may cause `NULL` pointer accesses at a
later place as `git_buf_detach` will return `NULL` in that case.
Reject such patches as malformed with a nice error message.
|
|
|
223e7e43
|
2019-10-19T15:42:54
|
|
patch_parse: reject patches with multiple old/new paths
It's currently possible to have patches with multiple old path name
headers. As we didn't check for this case, this resulted in a memory
leak when overwriting the old old path with the new old path because we
simply discarded the old pointer.
Instead of fixing this by free'ing the old pointer, we should reject
such patches altogether. It doesn't make any sense for the "---" or
"+++" markers to occur multiple times within a patch n the first place.
This also implicitly fixes the memory leak.
|
|
|
7968e90f
|
2019-10-18T12:33:07
|
|
refdb_fs: properly parse corrupted reflogs
In previous versions, libgit2 could be coerced into writing reflog
messages with embedded newlines into the reflog by using
`git_stash_save` with a message containing newlines. While the root
cause is fixed now, it was noticed that upstream git is in fact able to
read such corrupted reflog messages just fine.
Make the reflog parser more lenient in order to just skip over
malformatted reflog lines to bring us in line with git. This requires us
to change an existing test that verified that we do indeed _fail_ to
parse such logs.
|
|
|
d8233feb
|
2019-10-18T09:24:14
|
|
reflog: allow adding entries with newlines in their message
Currently, the reflog disallows any entries that have a message with
newlines, as that would effectively break the reflog format, which may
contain a single line per entry, only. Upstream git behaves a bit
differently, though, especially when considering stashes: instead of
rejecting any reflog entry with newlines, git will simply replace
newlines with spaces. E.g. executing 'git stash push -m "foo\nbar"' will
create a reflog entry with "foo bar" as entry message.
This commit adjusts our own logic to stop rejecting commit messages with
newlines. Previously, this logic was part of `git_reflog_append`, only.
There is a second place though where we add reflog entries, which is the
serialization code in the filesystem refdb. As it didn't contain any
sanity checks whatsoever, the refdb would have been perfectly happy to
write malformatted reflog entries to the disk. This is being fixed with
the same logic as for the reflog itself.
|
|
|
c9464bf7
|
2019-10-17T18:33:12
|
|
Merge pull request #5273 from dlax/parse-diff-without-extended-headers
patch_parse: handle patches without extended headers
|
|
|
73e9535d
|
2019-10-17T13:43:26
|
|
tests: submodule: test cloning edge cases
Add two more tests that verify our behaviour in some edge cases, notably
when cloning into a non-empty directory and when cloning the same
submodule twice.
|
|
|
de412fc2
|
2019-10-17T13:36:22
|
|
tests: submodule: make use of sandboxes to clean repos
The test submodule::add::submodule_clone doesn't use a sandbox, and thus
the created repo will not get deleted after the test has finished.
Convert the test to use the empty standard repo sandbox instead to fix
this.
|
|
|
09b1ac11
|
2019-10-17T13:32:22
|
|
tests: submodule: fix tests for cloning submodules
The test submodule::add::homemade_clone unfortunately doesn't test
what's expected, but does instead clone the submodule to a directory
that is outside of the parent repository. Fixing this by cloning to the
correct location isn't possible, though, as `git_submodule_add_setup`
will have pre-created a ".git" file already, which will cause
`git_clone` to error out.
As it's not possible to perform the clone without fiddling around with
the repo's layout, let's just remove this test as that is in fact what
the new `git_submodule_clone` function is for.
|
|
47531f47
|
2019-10-11T12:44:09
|
|
refs: unlock unmodified refs on transaction commit
Refs which are locked in a transaction without an altered target,
still should to be unlocked on `git_transaction_commit`.
`git_transaction_free` also unlocks refs but the moment of calling of `git_transaction_free`
cannot be controlled in all situations.
Some binding libs call `git_transaction_free` on garbage collection or not at all if the
application exits before and don't provide public access to `git_transaction_free`.
It is better to release locks as soon as possible.
|
|
|
3c5d78bd
|
2019-05-01T16:16:26
|
|
submodule: provide a wrapper for simple submodule clone steps
|
|
11de594f
|
2019-10-16T22:11:33
|
|
patch_parse: handle patches without extended headers
Extended header lines (especially the "index <hash>..<hash> <mode>") are
not required by "git apply" so it import patches. So we allow the
from-file/to-file lines (--- a/file\n+++ b/file) to directly follow the
git diff header.
This fixes #5267.
|
|
|
ef5a3851
|
2019-10-11T07:47:17
|
|
Merge pull request #5257 from henkesn/master
Fix file locking on POSIX OS
|
|
|
1f9b4970
|
2019-10-11T07:44:10
|
|
Merge pull request #5260 from pks-t/pks/cmake3
cmake: update minimum CMake version to v3.5.1
|
|
|
3335a034
|
2019-10-10T15:28:46
|
|
refs: fix locks getting forcibly removed
The flag GIT_FILEBUF_FORCE currently does two things:
1. It will cause the filebuf to create non-existing leading
directories for the file that is about to be written.
2. It will forcibly remove any pre-existing locks.
While most call sites actually do want (1), they do not want to
remove pre-existing locks, as that renders the locking mechanisms
effectively useless.
Introduce a new flag `GIT_FILEBUF_CREATE_LEADING_DIRS` to
separate both behaviours cleanly from each other and convert
callers to use it instead of `GIT_FILEBUF_FORCE` to have them
honor locked files correctly.
As this conversion removes all current users of `GIT_FILEBUF_FORCE`,
this commit removes the flag altogether.
|
|
|
6716e2f3
|
2019-10-10T12:34:45
|
|
Merge pull request #5248 from dlax/parse-patch-empty-files
patch_parse: handle patches with new empty files
|
|
|
ebabb88f
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2019-10-10T09:25:32
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cmake: update minimum CMake version to v3.5.1
Back in commit cf9f34521 (cmake: bump minimum version to 2.8.11,
2017-09-06), we have bumped the minimum CMake version to require at
least v2.8.11. The main hold-backs back then were distributions like
RHEL/CentOS as well as Ubuntu Trusty, which caused us to not target a
more modern version. Nowadays, Ubuntu Trusty has been EOL'd and CentOS 6
has CMake v3.6.1 available via the EPEL6 repository, and thus it seems
fair to upgrade to a more recent version.
Going through repology [1], one can see that all supported mainstream
distributions do in fact have CMake 3 available. Going through the list,
the minimum version that is supported by all mainstream distros is in
fact v3.5.1:
- CentOS 6 via EPEL6: 3.6.1
- Debian Oldstable: 3.7.2
- Fedora 26: 3.8.2
- OpenMandriva 3.x: 3.5.1
- Slackware 14.2: 3.5.2
- Ubuntu 16.04: 3.5.1
Consequentally, let's upgrade CMake to the minimum version of 3.5.1 and
remove all the version CMake checks that aren't required anymore.
[1]: https://repology.org/project/cmake/versions
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63307cba
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2019-09-28T17:32:18
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Merge pull request #5226 from pks-t/pks/regexp-api
regexp: implement a new regular expression API
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b61810bf
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2019-09-28T15:52:25
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patch_parse: handle patches with new empty files
Patches containing additions of empty files will not contain diff data
but will end with the index header line followed by the terminating
sequence "-- ". We follow the same logic as in cc4c44a and allow "-- "
to immediately follow the index header.
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f585b129
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2019-09-12T14:29:28
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posix: remove superseded POSIX regex wrappers
The old POSIX regex wrappers have been superseded by our own regexp API
that provides a higher-level abstraction. Remove the POSIX wrappers in
favor of the new one.
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d77378eb
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2019-09-13T08:54:26
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regexp: implement new regular expression API
We currently support a set of different regular expression backends with
PCRE, PCRE2, regcomp(3P) and regcomp_l(3). The current implementation of
this is done via a simple POSIX wrapper that either directly uses
supplied functions or that is a very small wrapper.
To support PCRE and PCRE2, we use their provided <pcreposix.h> and
<pcre2posix.h> wrappers. These wrappers are implemented in such a way
that the accompanying libraries pcre-posix and pcre2-posix provide the
same symbols as the libc ones, namely regcomp(3P) et al. This works out
on some systems just fine, most importantly on glibc-based ones, where
the regular expression functions are implemented as weak aliases and
thus get overridden by linking in the pcre{,2}-posix library. On other
systems we depend on the linking order of libc and pcre library, and as
libc always comes first we will end up with the functions of the libc
implementation. As a result, we may use the structures `regex_t` and
`regmatch_t` declared by <pcre{,2}posix.h>, but use functions defined by
the libc, leading to segfaults.
The issue is not easily solvable. Somed distributions like Debian have
resolved this by patching PCRE and PCRE2 to carry custom prefixes to all
the POSIX function wrappers. But this is not supported by upstream and
thus inherently unportable between distributions. We could instead try
to modify linking order, but this starts becoming fragile and will not
work e.g. when libgit2 is loaded via dlopen(3P) or similar ways. In the
end, this means that we simply cannot use the POSIX wrappers provided by
the PCRE libraries at all.
Thus, this commit introduces a new regular expression API. The new API
is on a tad higher level than the previous POSIX abstraction layer, as
it tries to abstract away any non-portable flags like e.g. REG_EXTENDED,
which has no equivalents in all of our supported backends. As there are
no users of POSIX regular expressions that do _not_ reguest REG_EXTENDED
this is fine to be abstracted away, though. Due to the API being
higher-level than before, it should generally be a tad easier to use
than the previous one.
Note: ideally, the new API would've been called `git_regex_foobar` with
a file "regex.h" and "regex.c". Unfortunately, this is currently
impossible to implement due to naming clashes between the then-existing
"regex.h" and <regex.h> provided by the libc. As we add the source
directory of libgit2 to the header search path, an include of <regex.h>
would always find our own "regex.h". Thus, we have to take the bitter
pill of adding one more character to all the functions to disambiguate
the includes.
To improve guarantees around cross-backend compatibility, this commit
also brings along an improved regular expression test suite
core::regexp.
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174b7a32
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2019-09-19T12:24:06
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buffer: fix printing into out-of-memory buffer
Before printing into a `git_buf` structure, we always call `ENSURE_SIZE`
first. This macro will reallocate the buffer as-needed depending on
whether the current amount of allocated bytes is sufficient or not. If
`asize` is big enough, then it will just do nothing, otherwise it will
call out to `git_buf_try_grow`. But in fact, it is insufficient to only
check `asize`.
When we fail to allocate any more bytes e.g. via `git_buf_try_grow`,
then we set the buffer's pointer to `git_buf__oom`. Note that we touch
neither `asize` nor `size`. So if we just check `asize > targetsize`,
then we will happily let the caller of `ENSURE_SIZE` proceed with an
out-of-memory buffer. As a result, we will print all bytes into the
out-of-memory buffer instead, resulting in an out-of-bounds write.
Fix the issue by having `ENSURE_SIZE` verify that the buffer is not
marked as OOM. Add a test to verify that we're not writing into the OOM
buffer.
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208f1d7a
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2019-09-19T12:46:37
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buffer: fix infinite loop when growing buffers
When growing buffers, we repeatedly multiply the currently allocated
number of bytes by 1.5 until it exceeds the requested number of bytes.
This has two major problems:
1. If the current number of bytes is tiny and one wishes to resize
to a comparatively huge number of bytes, then we may need to loop
thousands of times.
2. If resizing to a value close to `SIZE_MAX` (which would fail
anyway), then we probably hit an infinite loop as multiplying the
current amount of bytes will repeatedly result in integer
overflows.
When reallocating buffers, one typically chooses values close to 1.5 to
enable re-use of resulting memory holes in later reallocations. But
because of this, it really only makes sense to use a factor of 1.5
_once_, but not looping until we finally are able to fit it. Thus, we
can completely avoid the loop and just opt for the much simpler
algorithm of multiplying with 1.5 once and, if the result doesn't fit,
just use the target size. This avoids both problems of looping
extensively and hitting overflows.
This commit also adds a test that would've previously resulted in an
infinite loop.
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8bf0f7eb
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2019-09-09T13:00:27
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cred: separate public interface from low-level details
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5d8a4659
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2019-09-13T10:31:49
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Merge pull request #5195 from tiennou/fix/commitish-smart-push
smart: use push_glob instead of manual filtering
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b545be3d
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2019-09-10T11:14:36
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open:fix memory leak when passing NULL to git_repository_open_ext
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c3a7892f
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2019-09-09T13:10:24
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Merge pull request #5209 from mkostyuk/apply-wrong-patch
apply: Fix a patch corruption related to EOFNL handling
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17d6cd45
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2019-09-09T13:06:22
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Merge pull request #5210 from buddyspike/master
ignore: correct handling of nested rules overriding wild card unignore
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585fbd74
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2019-08-28T23:18:31
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apply: Test for EOFNL mishandling when several hunks are processed
Introduce an unit test to validate that git_apply__patch() properly
handles EOFNL changes in case of patches with several hunks.
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a7b4b639
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2019-08-24T12:14:31
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ignore: correct handling of nested rules overriding wild card unignore
problem:
filesystem_iterator loads .gitignore files in top-down order.
subsequently, ignore module evaluates them in the order they are loaded.
this creates a problem if we have unignored a rule (using a wild card)
in a sub dir and ignored it again in a level further below (see the test
included in this patch).
solution:
process ignores in reverse order.
closes #4963
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5fc27aac
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2019-08-27T13:38:08
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Merge pull request #5208 from mkostyuk/apply-removed-new-file
apply: git_apply_to_tree fails to apply patches that add new files
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5498c318
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2019-08-27T13:10:53
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apply: free test data
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6de48085
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2019-08-27T11:29:24
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Merge pull request #5189 from libgit2/ethomson/attrs_from_head
Optionally read `.gitattributes` from HEAD
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aaa48d06
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2019-08-27T11:26:50
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Merge pull request #5196 from pks-t/pks/config-include-onbranch
config: implement "onbranch" conditional
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8cbef12d
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2019-08-08T11:52:54
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util: do not perform allocations in insertsort
Our hand-rolled fallback sorting function `git__insertsort_r` does an
in-place sort of the given array. As elements may not necessarily be
pointers, it needs a way of swapping two values of arbitrary size, which
is currently implemented by allocating a temporary buffer of the
element's size. This is problematic, though, as the emulated `qsort`
interface doesn't provide any return values and thus cannot signal an
error if allocation of that temporary buffer has failed.
Convert the function to swap via a temporary buffer allocated on the
stack. Like this, it can `memcpy` contents of both elements in small
batches without requiring a heap allocation. The buffer size has been
chosen such that in most cases, a single iteration of copying will
suffice. Most importantly, it can fully contain `git_oid` structures and
pointers.
Add a bunch of tests for the `git__qsort_r` interface to verify nothing
breaks. Furthermore, this removes the declaration of `git__insertsort_r`
and makes it static as it is not used anywhere else.
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dceedbb8
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2019-08-21T15:03:50
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apply: Test for git_apply_to_tree failures when new files are added
Introduce an unit test to validate if git_apply_to_tree() fails when an
applied patch adds new files.
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39d18fe6
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2019-07-31T08:37:10
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smart: use push_glob instead of manual filtering
The code worked under the assumption that anything under `refs/tags` are
tag objects, and all the rest would be peelable to a commit. As it is
completely valid to have tags to blobs under a non `refs/tags` ref, this
would cause failures when trying to peel a tag to a commit.
Fix the broken filtering by switching to `git_revwalk_push_glob`, which
already handles this case.
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071750a3
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2019-08-15T14:18:26
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cmake: move _WIN32_WINNT definitions to root
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0f40e68e
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2019-08-14T09:05:07
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Merge pull request #5187 from ianhattendorf/fix/clone-whitespace
clone: don't decode URL percent encodings
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62b80138
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2019-08-13T09:10:10
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clone: Remove whitespace ssh test
Will add later when infrastructure is configured
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b15e7f2d
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2019-08-12T09:56:51
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clone: Update whitespace test url
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cdbbb364
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2019-07-21T16:25:41
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filter: test second-level in-repo `.gitattributes`
Ensure that a `.gitattributes` file that is deeper in the tree is
honored, not just an attributes file at the root.
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ff25ec83
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2019-07-21T16:25:11
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tests: add a subdirectory to crlf tests
Add a subdirectory in the crlf.git bare repository that has a
second-level .gitattribute file.
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3661e35e
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2019-06-23T23:52:24
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filter: test we can filter a blob in a bare repo
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e7fc8601
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2019-07-21T11:53:29
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filter: test that system attributes can be ignored
Test that we can optionally ignore system attributes when filtering a
blob.
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c66f7605
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2019-07-21T11:44:11
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filter: ensure system attributes are read
By default, `/etc/gitattributes` (or the system equivalent) is read to
provide attributes. Ensure that, by default, this is read when
filtering blobs.
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a008ceea
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2019-07-21T11:01:36
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blob: convert users of git_blob_filtered_content
Move users of `git_blob_filtered_content` to `git_blob_filter`.
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b0692d6b
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2019-08-09T09:01:56
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Merge pull request #4913 from implausible/feature/signing-rebase-commits
Add sign capability to git_rebase_commit
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722ba93f
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2019-08-01T15:14:06
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config: implement "onbranch" conditional
With Git v2.23.0, the conditional include mechanism gained another new
conditional "onbranch". As the name says, it will cause a file to be
included if the "onbranch" pattern matches the currently checked out
branch.
Implement this new condition and add a bunch of tests.
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e208b195
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2019-08-01T13:42:19
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tests: config: catch OOM when assembling conditional config
When assembling contents of the conditionally including file, we use
`git_buf_printf` and `git_buf_puts` without checking for error returns.
Add `cl_git_pass` to fix this.
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835211dc
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2019-08-01T13:23:16
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tests: config: assert behaviour around includes
Add a few tests that verify some behaviour centered around includes. The
first set of tests verifies that we correctly override values depending
on the order of includes and other keys, the second set asserts that we
can correctly snapshot configuration files with includes.
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304e58c0
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2019-08-01T13:20:17
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tests: config::snapshot: modernize tests
Modernize the tests in config::snapshot to make them easier to
understand. Most important, include a cleanup function that frees config
and snapshot and unlink config files at the end of each test.
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