nimble/audio: Bound broadcast sink subgroup count#2251
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Reject sync requests whose subgroup count exceeds the broadcast sink subgroup array before copying BIS sync values into it. The previous code relied on a debug assertion in the scan delegator path, but production builds can still receive an oversized sync option. Fixes apache#2188
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Summary
Root cause
ble_audio_broadcast_sink_config()copiedsync_opt->num_subgroupsinto
sink->num_subgroupsand then used it as the loop bound for thefixed
sink->subgroups[]array. The visible guard was only a debugassertion in the scan delegator path, so production builds could still
receive an oversized sync option.
Validation
git diff --checknewt test @apache-mynewt-nimble/nimble/host/audio/teststops onWindows before executing tests because the native Newt target includes
POSIX
sys/mman.h; the PR CI runs this path on Ubuntu.Fixes #2188.