pkg/paho-mqtt: fix memory corruption #17503
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This fixes instances where a pointer to an enum (possibly sized one byte) is casted to a pointer to int (which is at least two and in most cases four bytes in size). As result, out-of-bounds memory accesses are bound to happen. This was detected by GCC 11.2.0 with -Wstringop-overflow.
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Reported issue upstream: eclipse-paho/paho.mqtt.embedded-c#233 Maybe upstream acts so promptly that we could just bump the version instead. |
benpicco
approved these changes
Jan 12, 2022
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Contribution description
This fixes instances where a pointer to an
enum(possibly sized one byte) is casted to a pointer toint(which is at least two and in most cases four bytes in size). As result, out-of-bounds memory accesses are bound to happen.This was detected by GCC 11.2.0 with
-Wstringop-overflow.Testing procedure
Green Murdock & pkg should still work as before
Issues/PRs references
Found in #17004