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security: add per-client operation count limit in PulseAudio protocol

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There was no limit on pending operations per client. Commands like
SET_SINK_VOLUME each allocate an operation that persists until a
manager sync completes. A client flooding these commands can exhaust
server memory. Add a MAX_OPERATIONS (64) limit per client.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Wim Taymans 2026-04-29 17:16:44 +02:00
parent f32295429f
commit 138e30df38
3 changed files with 8 additions and 0 deletions
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1
src/modules/module-protocol-pulse/defs.h
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@ -42,6 +42,7 @@
#define MAX_CLIENTS 64u
#define MAX_STREAMS 64u
#define MAX_OPERATIONS 64u
#define MODULE_INDEX_MASK 0xfffffffu
#define MODULE_FLAG (1u << 29)