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7b8339fb522e67e8aebb019577c20bd317cf4152
asterisk/main
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Alexis Hadjisotiriou 7b8339fb52 channel: Prevent crash during DTMF emulation when no timing module is loaded 
Description:
When Asterisk is running without a timing module, attempting to process DTMF
triggers a segmentation fault. This occurs because the system
attempts to access a null timing file descriptor when setting up the
DTMF emulation timer.

This fix ensures that the system checks for a valid timing source before
attempting to start the DTMF emulation timer. If no timing module is
present, it logs a warning and skips the emulation instead of crashing
the process.

Changes:
- Modified main/channel.c to add a safety check within the __ast_read function.
- Implemented a graceful return path when no timing source is available
- Added a LOG_WARNING to inform the administrator that DTMF emulation
  was skipped due to missing timing modules.

Testing:
- Disabled all timing_ modules in modules.conf and confirmed with
  'timing test'.
- Reproduced the crash by modifying the dialplan with:
 exten => 707,1,NoOp(Starting DTMF - No Timing Mode)
 same => n,Answer()
 same => n,Background(demo-congrats)
 same => n,WaitExten(10)
 same => n,Hangup()
  And calling 707 followed by 1
- Verified that with the fix applied, the system logs "No timing module
  loaded; skipping DTMF timer" and continues dialplan
  execution without crashing.
- Confirmed stability during concurrent media sessions and DTMF input.

Fixes: #566
2026-03-09 13:08:35 +00:00
..
stdtime
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
.gitignore
…
abstract_jb.c
abstract_jb.c: Remove redundant timer check per static analysis.
2025-12-03 13:58:30 +00:00
acl.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
adsi.c
…
alaw.c
…
alertpipe.c
utils: Wrap socket() and pipe() to reduce syscalls
2018-12-07 09:06:08 -05:00
aoc.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
app.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
ast_expr2.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
ast_expr2.fl
general: Fix broken links.
2023-12-08 13:11:54 +00:00
ast_expr2.h
ael: Regenerate lexers and parsers.
2023-04-03 07:58:23 -05:00
ast_expr2.y
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
ast_expr2f.c
general: Fix broken links.
2023-12-08 13:11:54 +00:00
asterisk.c
asterisk.c: Use C.UTF-8 locale instead of relying on user's environment.
2026-01-26 19:42:23 +00:00
asterisk.dynamics
res_monitor: Remove deprecated module.
2023-01-13 08:32:33 -06:00
asterisk.exports.in
Scope Tracing: A new facility for tracing scope enter/exit
2020-06-02 11:35:07 -05:00
astfd.c
astfd.c: Avoid calling fclose with NULL argument.
2024-09-25 18:27:20 +00:00
astmm.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
astobj2_container_private.h
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
astobj2_container.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
astobj2_global.c
core: Fix ABI mismatch of ao2_global_obj.
2019-09-23 07:35:48 -04:00
astobj2_hash.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
astobj2_private.h
…
astobj2_rbtree.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
astobj2.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
audiohook.c
audiohook.c: Ensure correct AO2 reference is dereffed.
2025-09-11 14:47:39 +00:00
autochan.c
…
autoservice.c
autoservice: Do not sleep if autoservice_stop is called within autoservice thread
2024-09-09 23:17:20 +00:00
backtrace.c
build: Fix another GCC discarded-qualifiers const error.
2026-02-18 19:30:18 +00:00
bridge_after.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
bridge_basic.c
main: Explicitly mark case statement fallthrough as such.
2025-11-12 22:10:51 +00:00
bridge_channel.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
bridge_roles.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
bridge.c
bridge.c: Obey BRIDGE_NOANSWER variable to skip answering channel.
2025-08-15 15:59:31 +00:00
bucket.c
docs: Various XML fixes
2025-01-16 15:32:54 +00:00
buildinfo.c
…
callerid.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
ccss.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
cdr.c
cdr: add CANCEL dispostion in CDR
2025-08-06 15:37:52 +00:00
cel.c
CDR/CEL Custom Performance Improvements
2026-03-02 16:43:30 +00:00
channel_internal_api.c
Revert "func_hangupcause.c: Add access to Reason headers via HANGUPCAUSE()"
2025-12-09 17:04:14 +00:00
channel_private.h
chan_pjsip: Add technology-specific off-nominal hangup cause to events.
2025-10-20 13:19:22 +00:00
channel.c
channel: Prevent crash during DTMF emulation when no timing module is loaded
2026-03-09 13:08:35 +00:00
channelstorage_ao2_legacy.c
channelstorage: Allow storage driver read locking to be skipped.
2025-11-12 21:27:24 +00:00
channelstorage_cpp_map_name_id.cc
channelstorage_cpp_map_name_id: Fix get_by_name_prefix prefix match
2026-01-23 15:25:43 +00:00
channelstorage_makeopts.xml
channelstorage_makeopts.xml: Remove errant XML character.
2025-07-01 14:02:39 +00:00
channelstorage.c
channelstorage_cpp_map_name_id: Fix get_by_name_prefix prefix match
2026-01-23 15:25:43 +00:00
channelstorage.h
channelstorage: Allow storage driver read locking to be skipped.
2025-11-12 21:27:24 +00:00
chanvars.c
…
cli.c
cli.c: Allow 'channel request hangup' to accept patterns.
2026-01-13 16:03:31 +00:00
codec_builtin.c
codec_builtin.c: Adjust some of the quality scores to reflect reality.
2025-10-06 15:46:30 +00:00
codec.c
Reduce startup/shutdown verbose logging
2024-02-12 18:46:32 +00:00
config_options.c
config_options.c: Improve misleading warning.
2025-10-02 14:43:06 +00:00
config.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
conversions.c
conversions.c: Specify that we only want to parse decimal numbers.
2022-03-23 17:13:03 -05:00
core_local.c
ccss: Add option to ccss.conf to globally disable it.
2025-12-01 14:06:00 +00:00
core_unreal.c
ccss: Add option to ccss.conf to globally disable it.
2025-12-01 14:06:00 +00:00
crypt.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
cygload.c
…
data_buffer.c
res_rtp_asterisk: Free payload when error on insertion to data buffer
2020-04-15 13:56:40 -05:00
datastore.c
Geolocation: Base Asterisk Prereqs
2022-07-07 08:19:14 -05:00
db.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
devicestate.c
devicestate: Don't publish redundant device state messages.
2025-10-22 15:47:21 +00:00
dial.c
main/dial.c: Set channel hangup cause on timeout in handle_timeout_trip
2025-12-29 19:37:38 +00:00
dns_core.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
dns_naptr.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
dns_query_set.c
…
dns_recurring.c
progdocs: Fix for Doxygen, the hidden parts.
2021-12-02 10:37:38 -06:00
dns_srv.c
Compiler fixes for gcc 10
2020-06-10 09:33:28 -05:00
dns_system_resolver.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
dns_test.c
progdocs: Fix for Doxygen, the hidden parts.
2021-12-02 10:37:38 -06:00
dns_tlsa.c
…
dns_txt.c
core/dns: Add system include required on FreeBSD
2020-04-28 13:05:55 -05:00
dns.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
dnsmgr.c
dnsmgr.c: dnsmgr_refresh() incorrectly flags change with DNS round-robin
2024-10-10 15:34:31 +00:00
dsp.c
dsp.c: Add support for detecting R2 signaling tones.
2026-03-03 22:07:26 +00:00
ecdisa.h
…
editline_compat.c
asterisk.c: Allow multi-byte characters on the Asterisk CLI.
2026-01-05 14:46:27 +00:00
editline_compat.h
asterisk.c: Allow multi-byte characters on the Asterisk CLI.
2026-01-05 14:46:27 +00:00
endpoints.c
endpoints: Allow access to latest snapshot directly.
2026-02-17 13:31:31 +00:00
enum.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
event.c
channel: Add multi-tenant identifier.
2024-08-12 15:21:35 +00:00
features_config.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
features_config.h
…
features.c
Fix some doxygen, typos and whitespace
2025-09-22 17:39:24 +00:00
file.c
main/file: fix translated-frame write loop to use current frame
2026-03-03 21:51:53 +00:00
fixedjitterbuf.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
fixedjitterbuf.h
…
format_cache.c
Reduce startup/shutdown verbose logging
2024-02-12 18:46:32 +00:00
format_cap.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
format_compatibility.c
codecs: Remove test-law.
2021-01-04 05:00:58 -06:00
format.c
Reduce startup/shutdown verbose logging
2024-02-12 18:46:32 +00:00
frame.c
frame.c: validate frame data length is less than samples when adjusting volume
2025-05-20 13:54:08 +00:00
framehook.c
…
fskmodem_float.c
build: Fix unused-but-set-variable warnings with gcc 16.
2026-02-25 13:25:21 +00:00
fskmodem_int.c
main: Spelling fixes
2021-11-15 17:33:27 -06:00
fskmodem.c
…
global_datastores.c
…
hashtab.c
…
heap.c
…
http.c
acl: Add ACL support to http and ari
2026-03-05 12:52:43 +00:00
image.c
Reduce startup/shutdown verbose logging
2024-02-12 18:46:32 +00:00
indications.c
Reduce startup/shutdown verbose logging
2024-02-12 18:46:32 +00:00
io.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
iostream.c
iostream.c: Handle TLS handshake attacks in order to resolve the issue of exceeding the maximum number of HTTPS sessions.
2025-10-28 12:44:32 +00:00
jitterbuf.c
…
json.c
ARI: REST over Websocket
2025-04-02 12:16:41 +00:00
libasteriskpj.c
…
libasteriskssl.c
…
libasteriskssl.exports.in
…
loader.c
options: Change ast_options from ast_flags to ast_flags64.
2025-07-30 16:04:01 +00:00
lock.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
logger_category.c
Logging: Add debug logging categories
2020-10-02 12:58:18 -05:00
logger_doc.xml
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
logger.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
Makefile
fix: Add macOS (Darwin) compatibility for building Asterisk
2026-02-26 15:51:08 +00:00
manager_bridges.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
manager_channels.c
chan_pjsip: Add technology-specific off-nominal hangup cause to events.
2025-10-20 13:19:22 +00:00
manager_doc.xml
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
manager_endpoints.c
…
manager_mwi.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
manager_system.c
…
manager.c
docs: Add "Provided-by" to doc XML and CLI output.
2026-03-03 18:55:56 +00:00
max_forwards.c
…
md5.c
Prequisites for ARI Outbound Websockets
2025-04-21 13:29:33 +00:00
media_cache.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
media_index.c
media_index.c: Refactored so it doesn't cache the index
2019-01-28 12:26:58 -07:00
message.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
mixmonitor.c
…
mwi.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
named_acl.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
named_locks.c
…
netsock2.c
…
optional_api.c
progdocs: Fix for Doxygen, the hidden parts.
2021-12-02 10:37:38 -06:00
options.c
options: Change ast_options from ast_flags to ast_flags64.
2025-07-30 16:04:01 +00:00
parking.c
stasis: Improve topic/subscription names and statistics.
2019-03-11 11:39:35 -03:00
pbx_app.c
docs: Add "Provided-by" to doc XML and CLI output.
2026-03-03 18:55:56 +00:00
pbx_builtins.c
pbx_builtins: Allow custom tone for WaitExten.
2025-09-04 15:03:45 +00:00
pbx_functions.c
docs: Add "Provided-by" to doc XML and CLI output.
2026-03-03 18:55:56 +00:00
pbx_hangup_handler.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
pbx_ignorepat.c
…
pbx_include.c
aelparse: Accept an included context with timings.
2021-08-06 09:04:28 -05:00
pbx_private.h
…
pbx_sw.c
…
pbx_switch.c
…
pbx_timing.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
pbx_variables.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
pbx.c
pbx.c: Print new context count when reloading dialplan.
2025-11-19 17:19:51 +00:00
pickup.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
plc.c
options: Change ast_options from ast_flags to ast_flags64.
2025-07-30 16:04:01 +00:00
poll.c
…
presencestate.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
privacy.c
…
refer.c
ari/pjsip: Make it possible to control transfers through ARI
2025-02-11 22:05:28 +00:00
rtp_engine.c
rtp_engine.c: Add exception for comfort noise payload.
2025-09-11 14:08:08 +00:00
say.c
build: Fix unused-but-set-variable warnings with gcc 16.
2026-02-25 13:25:21 +00:00
sched.c
sched: fix and test a double deref on delete of an executing call back
2022-01-21 10:06:57 -06:00
sdp_srtp.c
…
security_events.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
sem.c
…
serializer_shutdown_group.c
taskpool: Add taskpool API, switch Stasis to using it.
2025-09-16 17:21:30 +00:00
serializer.c
taskpool: Add taskpool API, switch Stasis to using it.
2025-09-16 17:21:30 +00:00
sha1.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
sip_api.c
…
slinfactory.c
…
smoother.c
main: Spelling fixes
2021-11-15 17:33:27 -06:00
sorcery.c
sorcery: Move from threadpool to taskpool.
2025-09-30 13:50:37 +00:00
sounds.c
sounds: Sort 'core show sounds' output
2019-02-04 14:40:35 -06:00
srv.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
stasis_bridges.c
docs: AMI documentation fixes.
2025-03-07 16:53:19 +00:00
stasis_cache_pattern.c
stasis: Improve topic/subscription names and statistics.
2019-03-11 11:39:35 -03:00
stasis_cache.c
stasis: Fix for Doxygen.
2021-11-18 14:46:42 -06:00
stasis_channels.c
chan_pjsip: Add technology-specific off-nominal hangup cause to events.
2025-10-20 13:19:22 +00:00
stasis_endpoints.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
stasis_message_router.c
taskpool: Fix some references to threadpool that should be taskpool.
2025-10-13 15:34:18 +00:00
stasis_message.c
build: Fix a few gcc 13 issues
2023-06-09 18:19:53 +00:00
stasis_state.c
GCC12: Fixes for 18+. state_id_by_topic comparing wrong value
2022-05-09 08:20:46 -05:00
stasis_system.c
docs: Indent <since> tags.
2025-01-29 14:18:25 +00:00
stasis.c
stasis.c: Fix deadlock in stasis_topic_pool_get_topic during module load
2026-01-26 20:33:27 +00:00
strcompat.c
fix: Add macOS (Darwin) compatibility for building Asterisk
2026-02-26 15:51:08 +00:00
stream.c
core_unreal.c: Fix memory leak in ast_unreal_new_channels()
2024-10-17 15:20:44 +00:00
stringfields.c
…
strings.c
ARI Outbound Websockets
2025-06-02 16:35:34 +00:00
stun.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
syslog.c
…
taskpool.c
pjsip: Move from threadpool to taskpool
2025-12-16 17:03:49 +00:00
taskprocessor.c
build: Fix GCC discarded-qualifiers const errors.
2026-02-18 13:43:42 +00:00
tcptls.c
Prequisites for ARI Outbound Websockets
2025-04-21 13:29:33 +00:00
tdd.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
term.c
term.c: Add support for extended number format terminfo files.
2021-09-08 19:10:54 -05:00
test.c
Add ability to pass arguments to unit tests from the CLI
2025-01-02 14:52:18 +00:00
threadpool.c
taskprocessors: Improve logging and add new cli options
2025-12-04 16:13:08 +00:00
threadstorage.c
…
time.c
time: add support for time64 libcs
2022-03-24 12:00:58 -05:00
timing.c
…
translate.c
translate.c: implement new direct comp table mode
2024-02-28 13:03:26 +00:00
udptl.c
docs: Fix various typos in main/
2025-02-20 21:46:35 +00:00
ulaw.c
…
uri.c
uri.c: Simplify ast_uri_make_host_with_port()
2023-11-14 20:51:40 +00:00
utf8.c
res_pjsip: Replace invalid UTF-8 sequences in callerid name
2023-03-01 09:50:02 -06:00
utils.c
build: Fix unused-but-set-variable warnings with gcc 16.
2026-02-25 13:25:21 +00:00
uuid.c
main: Fix for Doxygen.
2021-12-02 15:02:09 -06:00
xml.c
fix: Add macOS (Darwin) compatibility for building Asterisk
2026-02-26 15:51:08 +00:00
xmldoc.c
docs: Add "Provided-by" to doc XML and CLI output.
2026-03-03 18:55:56 +00:00