We add the _OR_GOTO_DONE suffix to the macros that go to done if the
allocation fails. This makes it obvious what is different about the
macro versus the equivalent function, and that error handling is
built-in.
Renamed the cli_strdup to safer_strdup to make it obvious that it exists
because it is safer than regular strdup. Regular strdup doesn't have the
NULL check before trying to dup, and so may result in a NULL-deref
crash.
Also remove unused STRDUP (_OR_GOTO_DONE) macro, since the one with the
NULL-check is preferred.
There are a large number of allocations for fix sized buffers using the
`cli_malloc` and `cli_calloc` calls that check if the requested size is
larger than our allocation threshold for allocations based on untrusted
input. These allocations will *always* be higher than the threshold, so
the extra stack frame and check for these calls is a waste of CPU.
This commit replaces needless calls with A -> B:
- cli_malloc -> malloc
- cli_calloc -> calloc
- CLI_MALLOC -> MALLOC
- CLI_CALLOC -> CALLOC
I also noticed that our MPOOL_MALLOC / MPOOL_CALLOC are not limited by
the max-allocation threshold, when MMAP is found/enabled. But the
alternative was set to cli_malloc / cli_calloc when disabled. I changed
those as well.
I didn't change the cli_realloc/2 calls because our version of realloc
not only implements a threshold but also stabilizes the undefined
behavior in realloc to protect against accidental double-free's.
It may be worth implementing a cli_realloc that doesn't have the
threshold built-in, however, so as to allow reallocaitons for things
like buffers for loading signatures, which aren't subject to the same
concern as allocations for scanning possible malware.
There was one case in mbox.c where I changed MALLOC -> CLI_MALLOC,
because it appears to be allocating based on untrusted input.
* Added loglevel parameter to logg()
* Fix logg and mprintf internals with new loglevels
* Update all logg calls to set loglevel
* Update all mprintf calls to set loglevel
* Fix hidden logg calls
* Executed clam-format
The named "shared" is confusing, especially now that these features are
built as a static library instead of being directly compiled into the
various applications.
Coverity warnings:
- 293628 Uninitialized pointer read - In reload_db: Reads
an uninitialized pointer or its target. A fail case
could lead to `rldata` being used before initialization
- 293627 Uninitialized pointer read - In reload_th: Reads
an uninitialized pointer or its target. A fail case could
lead to `engine` being used before initialization
- 265483 Uninitialized pointer write - In parseEmailFile:
Write to target of an uninitialized pointer. A fail case
could lead `ret` to be dereferenced and written to
- 265482 Resource leak - In parseEmailFile: Leak of memory
or pointers to system resources. A fail case could lead
to `head` being leaked
- 225221 Resource leak - In onas_get_opt_list: Leak of memory
or pointers to system resources. A fail case could lead to
`opt_list` being leaked
- 225181 Resource leak - In onas_ht_rm_hierarchy: Leak of
memory or pointers to system resources. A fail case could
lead to `prntname` being leaked
- 193874 Resource leak - In cli_genfname: Leak of memory
or pointers to system resources. A fail case could lead
to `sanitized_prefix` being leaked
- 225196 Resource leak - In onas_fan_eloop: Leak of memory
or pointers to system resources. A fail cases could lead
to `event_data` being leaked
Also, I added some unresolved comments regarding clamonacc
functionality, and added a version compatibility check that
is shown in the example code in the `fanotify` man page
Added logic to inotify and fanotify startup to print an error and skip
watching the clamd TemporaryDirectory if specified, or the default tmp
directory if not specified to prevent users from watching the directory
where clamd will write temp files. In addition, when using inotify (DDD)
it will try to exclude the clamd temp directory in case it was included
by watching a parent directory. This means that users may set
TemporaryDirectory to something like /tmp/clam and then watch /tmp and
clamonacc will automatically ignore /tmp/clam.
Default --wait timeout adjusted from 29 to 30 seconds.
--ping and --wait should exit with CL_ETIMEOUT (21) on timeout.
--ping should only return exit code 0 if clamd responds.
Silenced a couple switch fall-through warnings.
Added proc_fd_fname stack buffer to use with readlink, because the
pointers are restricted and using the same buffer with readlink could
result in undefined behavior.
Relocated clamonacc log verbosity initialization so early verbose log
messages will be printed.
Added a new status code for clamonacc startup checks so the --ping
feature can exit the process early with exit code 0.
This patch adds experimental-quality CMake build tooling.
The libmspack build required a modification to use "" instead of <> for
header #includes. This will hopefully be included in the libmspack
upstream project when adding CMake build tooling to libmspack.
Removed use of libltdl when using CMake.
Flex & Bison are now required to build.
If -DMAINTAINER_MODE, then GPERF is also required, though it currently
doesn't actually do anything. TODO!
I found that the autotools build system was generating the lexer output
but not actually compiling it, instead using previously generated (and
manually renamed) lexer c source. As a consequence, changes to the .l
and .y files weren't making it into the build. To resolve this, I
removed generated flex/bison files and fixed the tooling to use the
freshly generated files. Flex and bison are now required build tools.
On Windows, this adds a dependency on the winflexbison package,
which can be obtained using Chocolatey or may be manually installed.
CMake tooling only has partial support for building with external LLVM
library, and no support for the internal LLVM (to be removed in the
future). I.e. The CMake build currently only supports the bytecode
interpreter.
Many files used include paths relative to the top source directory or
relative to the current project, rather than relative to each build
target. Modern CMake support requires including internal dependency
headers the same way you would external dependency headers (albeit
with "" instead of <>). This meant correcting all header includes to
be relative to the build targets and not relative to the workspace.
For example, ...
```c
include "../libclamav/clamav.h"
include "clamd/clamd_others.h"
```
... becomes:
```c
// libclamav
include "clamav.h"
// clamd
include "clamd_others.h"
```
Fixes header name conflicts by renaming a few of the files.
Converted the "shared" code into a static library, which depends on
libclamav. The ironically named "shared" static library provides
features common to the ClamAV apps which are not required in
libclamav itself and are not intended for use by downstream projects.
This change was required for correct modern CMake practices but was
also required to use the automake "subdir-objects" option.
This eliminates warnings when running autoreconf which, in the next
version of autoconf & automake are likely to break the build.
libclamav used to build in multiple stages where an earlier stage is
a static library containing utils required by the "shared" code.
Linking clamdscan and clamdtop with this libclamav utils static lib
allowed these two apps to function without libclamav. While this is
nice in theory, the practical gains are minimal and it complicates
the build system. As such, the autotools and CMake tooling was
simplified for improved maintainability and this feature was thrown
out. clamdtop and clamdscan now require libclamav to function.
Removed the nopthreads version of the autotools
libclamav_internal_utils static library and added pthread linking to
a couple apps that may have issues building on some platforms without
it, with the intention of removing needless complexity from the
source. Kept the regular version of libclamav_internal_utils.la
though it is no longer used anywhere but in libclamav.
Added an experimental doxygen build option which attempts to build
clamav.h and libfreshclam doxygen html docs.
The CMake build tooling also may build the example program(s), which
isn't a feature in the Autotools build system.
Changed C standard to C90+ due to inline linking issues with socket.h
when linking libfreshclam.so on Linux.
Generate common.rc for win32.
Fix tabs/spaces in shared Makefile.am, and remove vestigial ifndef
from misc.c.
Add CMake files to the automake dist, so users can try the new
CMake tooling w/out having to build from a git clone.
clamonacc changes:
- Renamed FANOTIFY macro to HAVE_SYS_FANOTIFY_H to better match other
similar macros.
- Added a new clamav-clamonacc.service systemd unit file, based on
the work of ChadDevOps & Aaron Brighton.
- Added missing clamonacc man page.
Updates to clamdscan man page, add missing options.
Remove vestigial CL_NOLIBCLAMAV definitions (all apps now use
libclamav).
Rename Windows mspack.dll to libmspack.dll so all ClamAV-built
libraries have the lib-prefix with Visual Studio as with CMake.
Val Snyder