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bc219657
|
2018-12-19T11:01:55
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Merge pull request #4833 from csware/drop-empty-dirs
Remove empty (sub-)directories when deleting refs
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0f299365
|
2018-12-14T14:29:36
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annotated_commit: add failing test for looking up from annotated tag
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168fe39b
|
2018-11-28T14:26:57
|
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object_type: use new enumeration names
Use the new object_type enumeration names within the codebase.
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18e71e6d
|
2018-11-28T13:31:06
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index: use new enum and structure names
Use the new-style index names throughout our own codebase.
|
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0ddc6094
|
2018-11-30T09:46:14
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Merge pull request #4770 from tiennou/feature/merge-analysis-any-branch
Allow merge analysis against any reference
|
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e7873eb2
|
2018-11-29T08:00:31
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Merge pull request #4888 from TheBB/add-cb
revwalk: Allow changing hide_cb
|
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487233fa
|
2018-11-29T07:21:41
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Merge pull request #4895 from pks-t/pks/unused-warnings
Unused function warnings
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a904fc6d
|
2018-11-28T20:31:30
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Merge pull request #4870 from libgit2/ethomson/proxy
Add builtin proxy support for the http transport
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02bb39f4
|
2018-11-22T08:49:09
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stream registration: take an enum type
Accept an enum (`git_stream_t`) during custom stream registration that
indicates whether the registration structure should be used for standard
(non-TLS) streams or TLS streams.
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43b592ac
|
2018-10-25T08:49:01
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tls: introduce a wrap function
Introduce `git_tls_stream_wrap` which will take an existing `stream`
with an already connected socket and begin speaking TLS on top of it.
This is useful if you've built a connection to a proxy server and you
wish to begin CONNECT over it to tunnel a TLS connection.
Also update the pluggable TLS stream layer so that it can accept a
registration structure that provides an `init` and `wrap` function,
instead of a single initialization function.
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6ba3e6af
|
2018-11-18T21:53:48
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proxy tests: rename credential callback
Rename credential callback to proxy_cred_cb to match new cert callback.
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394ae7e1
|
2018-10-22T17:35:35
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proxy tests: support self-signed proxy cert
Give the proxy tests a proxy certificate callback, and allow self-signed
certificates when the `GITTEST_REMOTE_PROXY_SELFSIGNED` environment
variable is set (to anything). In that case, simply compare the hostname
from the callback to the hostname that we connected to.
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df2cc108
|
2018-11-18T10:29:07
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stream: provide generic registration API
Update the new stream registration API to be `git_stream_register`
which takes a registration structure and a TLS boolean. This allows
callers to register non-TLS streams as well as TLS streams.
Provide `git_stream_register_tls` that takes just the init callback for
backward compatibliity.
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45054732
|
2018-10-29T10:45:59
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tests: optionally ignore https cert validation
For testing, we may wish to use a man-in-the-middle proxy that can
inspect the CONNECT traffic to our test endpoints. For this, we will
need to accept the proxy's certificate, which will not be valid for the
true endpoint.
Add a new environment variable, GITTEST_REMOTE_SSL_NOVERIFY to disable
https certificate validation for the tests.
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4ecc14cd
|
2018-10-21T23:47:53
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tests: support optional PROXY_SCHEME
As we want to support HTTPS proxies, support an optional
`GITTEST_REMOTE_PROXY_SCHEME` environment variable for tests that will
allow for HTTPS support. (When unset, the tests default to HTTP
proxies.)
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de60d9b4
|
2018-10-21T21:00:37
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tests: PROXY_URL is more accurately PROXY_HOST
Change the `GITTEST_REMOTE_PROXY_URL` environment variable to be
`GITTEST_REMOTE_PROXY_HOST`, since it is a host:port combination, not an
actual URL. (We cannot use a URL here since we may want to include the
username:password combination in the constructed URL.)
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14a9a4f3
|
2018-11-21T11:18:46
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tests: move apply_helpers functions into own compilation unit
Currently, the "apply_helper" functions used for testing the apply logic are all
statically defined in the "apply_helpers.h" header file. This may lead to
warnings from the compiler in case where this header file is included, but not
all functions it brings along are used in the compilation unit where it has been
included into.
Fix these potential warnings by moving the implementation into its own
compilation unit "apply_helpers.c".
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2521e11c
|
2018-11-23T20:02:31
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|
tests: mailmap: avoid definition of unused static variables
The mailmap testdata header contains a set of static variable
definitions. As these variables aren't used in all places where they are
used, they trigger the unused-const-variable warnings. As we have
currently disabled those warnings explicitly, they are never triggered,
but we intend to enable them.
Avoid the issue by only keeping variable definitions that are actually
used in all locations. Move the others to where they are used.
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852bc9f4
|
2018-11-23T19:26:24
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|
khash: remove intricate knowledge of khash types
Instead of using the `khiter_t`, `git_strmap_iter` and `khint_t` types,
simply use `size_t` instead. This decouples code from the khash stuff
and makes it possible to move the khash includes into the implementation
files.
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bbf9f5a7
|
2018-11-21T11:20:14
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tests: path: only compile test_canonicalize on Win32 platforms
The function `test_canonicalize` is only used on Win32 platforms. It will thus
result in an unused function warning if these warnings are enabled and one is on
a platform different than Win32.
Fix the issue by only compiling in the function on Win32 platforms.
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|
0836f069
|
2018-11-14T16:08:30
|
|
revwalk: Allow changing hide_cb
Since git_revwalk objects are encouraged to be reused, a public
interface for changing hide_cb is desirable.
|
|
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43cbe6b7
|
2018-11-28T13:36:47
|
|
config: fix adding files if their parent directory is a file
When we try to add a configuration file with `git_config_add_file_ondisk`, we
treat nonexisting files as empty. We do this by performing a stat call, ignoring
ENOENT errors. This works just fine in case the file or any of its parents
simply does not exist, but there is also the case where any of the parent
directories is not a directory, but a file. So e.g. trying to add a
configuration file "/dev/null/.gitconfig" will fail, as `errno` will be ENOTDIR
instead of ENOENT.
Catch ENOTDIR in addition to ENOENT to fix the issue. Add a test that verifies
we are able to add configuration files with such an invalid path file just fine.
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0e3e832d
|
2018-11-21T13:30:01
|
|
Merge pull request #4884 from libgit2/ethomson/index_iterator
index: introduce git_index_iterator
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|
11d33df8
|
2018-11-18T23:39:43
|
|
Merge branch 'tiennou/fix/logallrefupdates-always'
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|
e226ad8f
|
2018-11-17T17:55:10
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|
refs: add support for core.logAllRefUpdates=always
Since we were not expecting this config entry to contain a string, we
would fail as soon as its (cached) value would be accessed. Hence,
provide some constants for the 4 states we use, and account for "always"
when we decide to reflog changes.
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646a94be
|
2018-11-18T23:15:56
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|
Merge pull request #4847 from noahp/noahp/null-arg-fixes
tests: 🌀 address two null argument instances
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|
7321cff0
|
2018-11-15T09:17:51
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Merge pull request #4713 from libgit2/ethomson/win_symlinks
Support symlinks on Windows when core.symlinks=true
|
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c358bbc5
|
2018-11-12T17:22:47
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|
index: introduce git_index_iterator
Provide a public git_index_iterator API that is backed by an index
snapshot. This allows consumers to provide a stable iteration even
while manipulating the index during iteration.
|
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|
4209a512
|
2018-11-14T12:04:42
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strntol: fix out-of-bounds reads when parsing numbers with leading sign
When parsing a number, we accept a leading plus or minus sign to return
a positive or negative number. When the parsed string has such a leading
sign, we set up a flag indicating that the number is negative and
advance the pointer to the next character in that string. This misses
updating the number of bytes in the string, though, which is why the
parser may later on do an out-of-bounds read.
Fix the issue by correctly updating both the pointer and the number of
remaining bytes. Furthermore, we need to check whether we actually have
any bytes left after having advanced the pointer, as otherwise the
auto-detection of the base may do an out-of-bonuds access. Add a test
that detects the out-of-bound read.
Note that this is not actually security critical. While there are a lot
of places where the function is called, all of these places are guarded
or irrelevant:
- commit list: this operates on objects from the ODB, which are always
NUL terminated any may thus not trigger the off-by-one OOB read.
- config: the configuration is NUL terminated.
- curl stream: user input is being parsed that is always NUL terminated
- index: the index is read via `git_futils_readbuffer`, which always NUL
terminates it.
- loose objects: used to parse the length from the object's header. As
we check previously that the buffer contains a NUL byte, this is safe.
- rebase: this parses numbers from the rebase instruction sheet. As the
rebase code uses `git_futils_readbuffer`, the buffer is always NUL
terminated.
- revparse: this parses a user provided buffer that is NUL terminated.
- signature: this parser the header information of objects. As objects
read from the ODB are always NUL terminated, this is a non-issue. The
constructor `git_signature_from_buffer` does not accept a length
parameter for the buffer, so the buffer needs to be NUL terminated, as
well.
- smart transport: the buffer that is parsed is NUL terminated
- tree cache: this parses the tree cache from the index extension. The
index itself is read via `git_futils_readbuffer`, which always NUL
terminates it.
- winhttp transport: user input is being parsed that is always NUL
terminated
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fd4e3b21
|
2018-11-13T15:33:20
|
|
Merge pull request #4885 from pks-t/pks/apply-test-fixups
apply: small fixups in the test suite
|
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|
cf83809b
|
2018-11-13T14:26:26
|
|
Merge pull request #4883 from pks-t/pks/signature-tz-oob
signature: fix out-of-bounds read when parsing timezone offset
|
|
f127ce35
|
2018-11-13T08:22:25
|
|
tests: address two null argument instances
Handle two null argument cases that occur in the unit tests.
One is in library code, the other is in test code.
Detected by running unit tests with undefined behavior sanitizer:
```bash
# build
mkdir build && cd build
cmake -DBUILD_CLAR=ON -DCMAKE_C_FLAGS="-fsanitize=address \
-fsanitize=undefined -fstack-usage -static-libasan" ..
cmake --build .
# run with asan
ASAN_OPTIONS="allocator_may_return_null=1" ./libgit2_clar
...
............../libgit2/src/apply.c:316:3: runtime error: null pointer \
passed as argument 1, which is declared to never be null
...................../libgit2/tests/apply/fromfile.c:46:3: runtime \
error: null pointer passed as argument 1, which is declared to never be null
```
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afc64bcd
|
2018-11-13T14:13:40
|
|
tests: apply: fix reference to deprecated `git_buf_free`
Since commit 56ffdfc61 (buffer: deprecate `git_buf_free` in favor of
`git_buf_dispose`, 2018-02-08), the function `git_buf_free` is
deprecated and shall not be used anymore. As part of the new apply
framework that has been cooking for quite some time some new references
have been introduced to that deprecated function. Replace them with
calls to `git_buf_dispose`.
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|
fe215153
|
2018-11-13T14:08:49
|
|
tests: apply: fix missing `cl_git_pass` wrappers
Some function calls in the new "apply" test suite were missing the
checks whether they succeeded as expected. Fix this by adding the
missing `cl_git_pass` wrappers.
|
|
|
20cb30b6
|
2018-11-13T13:40:17
|
|
Merge pull request #4667 from tiennou/feature/remote-create-api
Remote creation API
|
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|
28239be3
|
2018-11-13T13:27:41
|
|
Merge pull request #4818 from pks-t/pks/index-collision
Index collision fixes
|
|
|
11fbead8
|
2018-11-11T16:40:56
|
|
Merge pull request #4705 from libgit2/ethomson/apply
Patch (diff) application
|
|
|
52f859fd
|
2018-11-09T19:32:08
|
|
signature: fix out-of-bounds read when parsing timezone offset
When parsing a signature's timezone offset, we first check whether there
is a timezone at all by verifying that there are still bytes left to
read following the time itself. The check thus looks like `time_end + 1
< buffer_end`, which is actually correct in this case. After setting the
timezone's start pointer to that location, we compute the remaining
bytes by using the formula `buffer_end - tz_start + 1`, re-using the
previous `time_end + 1`. But this is in fact missing the braces around
`(tz_start + 1)`, thus leading to an overestimation of the remaining
bytes by a length of two. In case of a non-NUL terminated buffer, this
will result in an overflow.
The function `git_signature__parse` is only used in two locations. First
is `git_signature_from_buffer`, which only accepts a string without a
length. The string thus necessarily has to be NUL terminated and cannot
trigger the issue.
The other function is `git_commit__parse_raw`, which can in fact trigger
the error as it may receive non-NUL terminated commit data. But as
objects read from the ODB are always NUL-terminated by us as a
cautionary measure, it cannot trigger the issue either.
In other words, this error does not have any impact on security.
|
|
|
4e746d80
|
2018-11-05T15:49:11
|
|
test: ensure applying a patch can't delete a file twice
|
|
|
f8b9493b
|
2018-11-05T15:46:08
|
|
apply: test re-adding a file after removing it
Ensure that we can add a file back after it's been removed. Update the
renamed/deleted validation in application to not apply to deltas that
are adding files to support this.
|
|
|
78580ad3
|
2018-11-05T15:34:59
|
|
apply: test modifying a file after renaming it
Ensure that we cannot modify a file after it's been renamed out of the
way. If multiple deltas exist for a single path, ensure that we do not
attempt to modify a file after it's been renamed out of the way.
To support this, we must track the paths that have been removed or
renamed; add to a string map when we remove a path and remove from the
string map if we recreate a path. Validate that we are not applying to
a path that is in this map, unless the delta is a rename, since git
supports renaming one file to two different places in two different
deltas.
Further, test that we cannot apply a modification delta to a path that
will be created in the future by a rename (a path that does not yet
exist.)
|
|
|
605066ee
|
2018-11-05T14:37:35
|
|
apply: test renaming a file after modifying it
Multiple deltas can exist in a diff, and can be applied in-order.
If there exists a delta that modifies a file followed by a delta that
renames that file, then both will be captured. The modification delta
will be applied and the resulting file will be staged with the original
filename. The rename delta will be independently applied - to the
original file (not the modified file from the original delta) and staged
independently.
|
|
|
bd682f3e
|
2018-11-04T19:01:57
|
|
apply: test that we can't rename a file after modifying it
Multiple deltas can exist in a diff, and can be applied in-order.
However if there exists a delta that renames a file, it must be first,
so that other deltas can reference the resulting target file.
git enforces this (`error: already exists in index`), so ensure that we
do, too.
|
|
|
a3c1070c
|
2018-11-04T14:07:22
|
|
apply: test modify delta after rename delta
Ensure that we can apply a delta after renaming a file.
|
|
|
07e71bfa
|
2018-11-04T13:14:20
|
|
apply: test multiple deltas to new file
|
|
|
df4258ad
|
2018-11-04T13:01:03
|
|
apply: handle multiple deltas to the same file
git allows a patch file to contain multiple deltas to the same file:
although it does not produce files in this format itself, this could
be the result of concatenating two different patch files that affected
the same file.
git apply behaves by applying this next delta to the existing postimage
of the file. We should do the same. If we have previously seen a file,
and produced a postimage for it, we will load that postimage and apply
the current delta to that. If we have not, get the file from the
preimage.
|
|
|
c71e964a
|
2018-11-04T12:21:57
|
|
apply: test rename 1 to 2
Test that a patch can contain two deltas that appear to rename an
initial source file to two different destination paths. Git creates
both target files with the initial source contents; ensure that we do,
too.
|
|
|
56a2ae0c
|
2018-11-04T12:18:01
|
|
apply: test rename 2 to 1
Test that we can apply a patch that renames two different files to the
same target filename. Git itself handles this scenario in a last-write
wins, such that the rename listed last is the one persisted in the
target. Ensure that we do the same.
|
|
|
235dc9b2
|
2018-11-04T12:05:46
|
|
apply: test circular rename
Test a rename from A->B simultaneous with a rename from B->A.
|
|
|
89b5a56e
|
2018-11-04T11:58:20
|
|
apply: test rename A -> B -> C scenarios
Test that we can rename some file from B->C and then rename some other
file from A->B. Do this with both exact rename patches (eg `rename from
...` / `rename to ...`) and patches that remove the files and replace
them entirely.
|
|
|
6fecf4d1
|
2018-11-04T11:47:46
|
|
apply: handle exact renames
Deltas containing exact renames are special; they simple indicate that a
file was renamed without providing additional metadata (like the
filemode). Teach the reader to provide the file mode and use the
preimage's filemode in the case that the delta does not provide one.)
|
|
|
12f9ac17
|
2018-11-04T11:26:42
|
|
apply: validate unchanged mode when applying both
When applying to both the index and the working directory, ensure that
the working directory's mode matches the index's mode. It's not
sufficient to look only at the hashed object id to determine that the
file is unchanged, git also takes the mode into account.
|
|
|
b73a42f6
|
2018-11-04T10:48:23
|
|
apply: test a patch with rename and modification
Create a test applying a patch with a rename and a modification of a
file.
|
|
620ac9c2
|
2017-04-11T14:41:57
|
|
patch: add tests for aborting hunk callback
|
|
|
72630572
|
2017-03-30T22:40:47
|
|
patch: add support for partial patch application
Add hunk callback parameter to git_apply__patch to allow hunks to be skipped.
|
|
|
47cc5f85
|
2018-09-29T19:32:51
|
|
apply: introduce a hunk callback
Introduce a callback to patch application that allows consumers to
cancel hunk application.
|
|
|
398d8bfe
|
2018-07-16T17:19:08
|
|
apply tests: tests a diff w/ many small changes
|
|
|
b8840db7
|
2018-07-10T16:18:45
|
|
apply tests: test delta callback skip
Test that we can return a non-zero value from the apply delta
callback and it will skip the application of a given delta.
|
|
|
db6b1164
|
2018-07-10T16:13:17
|
|
apply tests: test delta callback errors
Test that we can return an error from the apply delta callback and the
error code is propagated back to the caller.
|
|
|
37b25ac5
|
2018-07-08T16:12:58
|
|
apply: move location to an argument, not the opts
Move the location option to an argument, out of the options structure.
This allows the options structure to be re-used for functions that don't
need to know the location, since it's implicit in their functionality.
For example, `git_apply_tree` should not take a location, but is
expected to take all the other options.
|
|
|
813f0802
|
2018-07-01T15:14:36
|
|
apply: validate workdir contents match index for BOTH
When applying to both the index and the working directory, ensure that
the index contents match the working directory. This mirrors the
requirement in `git apply --index`.
This also means that - along with the prior commit that uses the working
directory contents as the checkout baseline - we no longer expect
conflicts during checkout. So remove the special-case error handling
for checkout conflicts. (Any checkout conflict now would be because the
file was actually modified between the start of patch application and
the checkout.)
|
|
|
3b674660
|
2018-07-01T13:46:59
|
|
apply tests: ensure we can patch a modified file
Patch application need not be on an unmodified file; applying to an
already changed file is supported provided the patch still applies
cleanly. Add tests that modifies the contents of a file then applies
the patch and ensures that the patch applies cleanly, and the original
changes are also kept.
|
|
|
eb76e985
|
2018-07-01T21:21:25
|
|
apply tests: ensure mode changes occur
Test that a mode change is reflected in the working directory or index.
|
|
|
5c63ce79
|
2018-07-01T11:10:03
|
|
apply tests: test with CR/LF filtering
Ensure that we accurately CR/LF filter when reading from the working
directory. If we did not, we would erroneously fail to apply the patch
because the index contents did not match the working directory contents.
|
|
|
4ff829e9
|
2018-06-30T17:20:03
|
|
apply tests: test index+workdir application
Test application with `GIT_APPLY_LOCATION_BOTH`, which emulates
`git apply --index`, updating both the index and the working directory
with the postimage.
|
|
|
9db66c79
|
2018-06-29T12:50:38
|
|
apply test: apply with non-conflicting changes
Ensure that we can apply to the working directory or the index when the
application target is modified, so long as there are not conflicting
changes to the items.
|
|
|
771bd81e
|
2018-06-29T12:40:16
|
|
apply tests: ensure apply failures leave index unmodified
|
|
|
2bd3cfea
|
2018-06-29T11:43:55
|
|
apply tests: modified wd items are ok when applying to index
When applying to the index (using `GIT_APPLY_LOCATION_INDEX`), ensure
that items modified in the working directory do not conflict with the
application.
|
|
|
d7090ee4
|
2018-06-28T17:26:24
|
|
apply tests: ensure we can add and remove files from the index
Add a test that adds a new file, and another that removes a file when
applying using `GIT_APPLY_LOCATION_INDEX` to ensure that they work.
|
|
|
9d81defa
|
2018-06-28T16:26:08
|
|
apply tests: GIT_APPLY_LOCATION_INDEX with parsed patches
|
|
|
eef34e4e
|
2018-06-28T16:24:21
|
|
apply tests: GIT_APPLY_LOCATION_INDEX with generated patches
Test a simple patch application with `GIT_APPLY_LOCATION_INDEX`, which
emulates `git apply --cached`.
|
|
|
c010c93b
|
2018-06-27T16:50:07
|
|
apply tests: move helpers into common area
|
|
|
35d525b0
|
2018-06-26T09:19:12
|
|
apply: test that failures don't dirty workdir
Ensure that when a patch application fails (due to a conflict in the
working directory, for example) that we do not half-apply the patch or
otherwise leave the working directory dirty.
This is rather obvious in our current apply implementation (we do a two
step process: one to create the post-image and one to check it out) but
this test is a safety net for future refactoring or improvements.
|
|
|
973bf0c8
|
2018-06-25T20:49:22
|
|
apply: test a patch can be applied even with a modified index
Ensure that we can apply a patch to the working directory, even to files
that are modified in the index (as long as the working directory
contents match the preimage - such that the working directory is
unmodified from HEAD).
|
|
|
553395dc
|
2018-06-25T20:21:01
|
|
apply: test that the index is not modified
Ensure that by default, when using GIT_APPLY_LOCATION_WORKDIR, that
patch application does not update the index, only the working directory.
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0eb63b9f
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2018-06-25T19:50:35
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apply tests: separate common patch hunks
Move the commonly-used patch hunks into a single constant location.
This allows us to avoid re-declaring them in each test, and allows
us to compose them to build a larger patch file that includes all
the hunks.
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702d4bec
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2018-06-26T15:26:37
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apply tests: use `git_iterator_foreach` for tests
Use the new `git_iterator_foreach` API to validate the workdir against
the expected workdir values instead of using the paired/multi iterator
comparison callback. This allows us to use the `git_iterator_foreach`
to validate the index as well, instead of assuming that the index and
HEAD must always match.
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9c34c996
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2018-06-25T17:03:14
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apply: handle file additions
Don't attempt to read the postimage file during a file addition, simply
use an empty buffer as the postimage. Also, test that we can handle
file additions.
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3b5378c5
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2018-06-25T16:27:06
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apply: handle file deletions
If the file was deleted in the postimage, do not attempt to update the
target. Instead, ignore it and simply allow it to stay removed in our
computed postimage. Also, test that we can handle file deletions.
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af3287f8
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2018-06-22T19:27:19
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apply: test `git_apply` with a parsed patch
Ensure that we can apply a simple patch to the working directory when we
have parsed it from a patch file.
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ff296b71
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2018-03-19T19:50:52
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apply: test `git_apply` application to a workdir
Introduce a standard test applying a diff to a working directory with no
complications.
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02b1083a
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2018-01-28T23:25:07
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apply: introduce `git_apply_tree`
Introduce `git_apply_tree`, which will apply a `git_diff` to a given
`git_tree`, allowing an in-memory patch application for a repository.
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2b12dcf6
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2018-03-19T19:45:11
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iterator: optionally hash filesystem iterators
Optionally hash the contents of files encountered in the filesystem or
working directory iterators. This is not expected to be used in
production code paths, but may allow us to simplify some test contexts.
For working directory iterators, apply filters as appropriate, since we
have the context able to do it.
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666c7bd8
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2018-10-08T20:51:45
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tests: unwarranted NULL-ification
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3652b83a
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2018-06-22T21:36:01
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tests: remote/create: remove macro and unroll tests
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d3650294
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2018-06-20T02:27:14
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remote: add a flag to prevent generation of the default fetchspec
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fdb116b3
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2018-06-20T02:27:12
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remote: add a creation flag for ignoring url.insteadOf
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3cbaebdf
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2018-06-20T02:27:11
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remote: provide a generic API for creating remotes
This supersedes the functionality of remote_create_with_fetchspec, remote_create_anonymous and remote_create_detached.
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0e5a27cd
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2018-06-20T02:26:58
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tests: count config section helper already exists
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f8fc987c
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2018-06-20T02:26:56
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tests: git_remote_create_detached
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4e0da450
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2018-06-20T02:26:55
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tests: check what happens with the remote. section counts
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f778af68
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2018-06-20T02:26:53
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tests: git_remote_create_anonymous
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fa69195e
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2018-06-20T02:26:52
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tests: git_remote_create_with_fetchspec
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10fa2dd6
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2018-06-20T02:26:50
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tests: consolidate all remote creation tests in one test suite
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798be87e
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2018-06-20T02:26:49
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tests: rename remote creation test suite
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7fafec0e
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2018-10-29T18:32:39
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tree: fix integer overflow when reading unreasonably large filemodes
The `parse_mode` option uses an open-coded octal number parser. The
parser is quite naive in that it simply parses until hitting a character
that is not in the accepted range of '0' - '7', completely ignoring the
fact that we can at most accept a 16 bit unsigned integer as filemode.
If the filemode is bigger than UINT16_MAX, it will thus overflow and
provide an invalid filemode for the object entry.
Fix the issue by using `git__strntol32` instead and doing a bounds
check. As this function already handles overflows, it neatly solves the
problem.
Note that previously, `parse_mode` was also skipping the character
immediately after the filemode. In proper trees, this should be a simple
space, but in fact the parser accepted any character and simply skipped
over it. As a consequence of using `git__strntol32`, we now need to an
explicit check for a trailing whitespace after having parsed the
filemode. Because of the newly introduced error message, the test
object::tree::parse::mode_doesnt_cause_oob_read needs adjustment to its
error message check, which in fact is a good thing as it demonstrates
that we now fail looking for the whitespace immediately following the
filemode.
Add a test that shows that we will fail to parse such invalid filemodes
now.
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f647bbc8
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2018-10-29T17:25:09
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tree: fix mode parsing reading out-of-bounds
When parsing a tree entry's mode, we will eagerly parse until we hit a
character that is not in the accepted set of octal digits '0' - '7'. If
the provided buffer is not a NUL terminated one, we may thus read
out-of-bounds.
Fix the issue by passing the buffer length to `parse_mode` and paying
attention to it. Note that this is not a vulnerability in our usual code
paths, as all object data read from the ODB is NUL terminated.
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d4ad658a
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2018-10-29T17:24:47
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tree: add various tests exercising the tree parser
We currently don't have any tests that directly exercise the tree
parser. This is due to the fact that the parsers for raw object data has
only been recently introduce with commit ca4db5f4a (object: implement
function to parse raw data, 2017-10-13), and previous to that the setup
simply was too cumbersome as it always required going through the ODB.
Now that we have the infrastructure, add a suite of tests that directly
exercise the tree parser and various edge cases.
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50d09407
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2018-10-29T18:05:27
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strntol: fix detection and skipping of base prefixes
The `git__strntol` family of functions has the ability to auto-detect
a number's base if the string has either the common '0x' prefix for
hexadecimal numbers or '0' prefix for octal numbers. The detection of
such prefixes and following handling has two major issues though that are
being fixed in one go now.
- We do not do any bounds checking previous to verifying the '0x' base.
While we do verify that there is at least one digit available
previously, we fail to verify that there are two digits available and
thus may do an out-of-bounds read when parsing this
two-character-prefix.
- When skipping the prefix of such numbers, we only update the pointer
length without also updating the number of remaining bytes. Thus if we
try to parse a number '0x1' of total length 3, we will first skip the
first two bytes and then try to read 3 bytes starting at '1'.
Fix both issues by disentangling the logic. Instead of doing the
detection and skipping of such prefixes in one go, we will now first try
to detect the base while also honoring how many bytes are left. Only if
we have a valid base that is either 8 or 16 and have one of the known
prefixes, we will now advance the pointer and update the remaining bytes
in one step.
Add some tests that verify that no out-of-bounds parsing happens and
that autodetection works as advertised.
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41863a00
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2018-10-29T17:19:58
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strntol: fix out-of-bounds read when skipping leading spaces
The `git__strntol` family of functions accepts leading spaces and will
simply skip them. The skipping will not honor the provided buffer's
length, though, which may lead it to read outside of the provided
buffer's bounds if it is not a simple NUL-terminated string.
Furthermore, if leading space is trimmed, the function will further
advance the pointer but not update the number of remaining bytes, which
may also lead to out-of-bounds reads.
Fix the issue by properly paying attention to the buffer length and
updating it when stripping leading whitespace characters. Add a test
that verifies that we won't read past the provided buffer length.
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