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security: add total sample cache size limit in PulseAudio protocol

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There was no limit on the total size of the sample cache. A client
could upload many samples to exhaust server memory. Add a configurable
pulse.max-sample-cache property (default 64MB) to cap the total size
of all cached samples.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Wim Taymans 2026-04-29 16:39:57 +02:00
parent 37990b5e90
commit 52afec565b
5 changed files with 18 additions and 0 deletions
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src/daemon/pipewire-pulse.conf.in
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@ -120,6 +120,7 @@ pulse.properties = {
#pulse.min.quantum = 256/48000 # 5.3ms
#pulse.idle.timeout = 0 # don't pause after underruns
#pulse.max-streams = 64 # max streams per client
#pulse.max-sample-cache = 67108864 # max total sample cache size (64MB)
#pulse.default.format = F32
#pulse.default.position = [ FL FR ]
}