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fix(modules): null-check packetPool/clientNotificationPool/mqttClientProxyMessagePool allocations (#10951)

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* fix(modules): null-check packetPool/clientNotificationPool/mqttClientProxyMessagePool allocations

Follow-up to fix/meshpacket-alloc-null-checks (PR meshtastic/firmware#10948),
which fixed the core routing path (Router/NextHopRouter/ReliableRouter/
MeshService/RadioLibInterface) after reproducing a HardFault on STM32WL
hardware under real mesh traffic. This covers the same allocCopy()/
allocZeroed() unchecked-return pattern in lower-frequency paths that were
out of scope for that PR: SimRadio.cpp (portduino sim RX/TX), NodeInfoModule,
the Telemetry modules' power-saving-sleep notifications, MQTT (map report,
client-proxy messages, config-validation notifications), PositionModule,
SerialModule, and KeyVerificationModule.

Sites where the allocation result was already read back through an
existing null check downstream (e.g. Telemetry's lastMeasurementPacket,
SimRadio's receivingPacket, AdminModule::sendWarning) were left as-is -
verified safe, not touched.

Router::allocForSending() (and everything that funnels through it, e.g.
allocDataProtobuf()) remains unguarded and out of scope here too - it's
called from 30+ sites across the codebase and needs its own audit.

Assisted-by: Claude Sonnet 5 <noreply@anthropic.com>
Signed-off-by: Andrew Yong <me@ndoo.sg>

* fix(KeyVerificationModule): bound cn->message writes with snprintf

CodeRabbit flagged unbounded sprintf() writes into the fixed-size
ClientNotification.message buffer as a static-analysis nitpick while
reviewing this PR's allocation null-checks. Align these four sites with
the snprintf(dest, sizeof(dest), ...) pattern already used for the same
field elsewhere in this PR (SerialModule.cpp, MQTT.cpp).

Assisted-by: Claude Sonnet 5 <noreply@anthropic.com>
Signed-off-by: Andrew Yong <me@ndoo.sg>

---------

Signed-off-by: Andrew Yong <me@ndoo.sg>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
This commit is contained in:
Andrew YongandBen Meadors authored and GitHub committed 2026-07-09 10:34:58 -05:00
1 parent 515fe8b94f
commit 6768bd08df
9 files changed
+112 -79
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src/modules/SerialModule.cpp
+6 -4
View File
@@ -96,10 +96,12 @@ bool SerialModule::isValidConfig(const meshtastic_ModuleConfig_SerialConfig &con
LOG_ERROR(warning);
#ifndef PIO_UNIT_TESTING
meshtastic_ClientNotification *cn = clientNotificationPool.allocZeroed();
cn->level = meshtastic_LogRecord_Level_ERROR;
cn->time = getValidTime(RTCQualityFromNet);
snprintf(cn->message, sizeof(cn->message), "%s", warning);
service->sendClientNotification(cn);
if (cn) {
cn->level = meshtastic_LogRecord_Level_ERROR;
cn->time = getValidTime(RTCQualityFromNet);
snprintf(cn->message, sizeof(cn->message), "%s", warning);
service->sendClientNotification(cn);
}
#endif
return false;
}