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kmsan: skip memdescs of type MEMDESC_VMPAGES
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Authored by chs on Thu, Sep 24, 12:09 AM.

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olce

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Reviewers

imp
jhb
markj

Summary

In kmsan_bus_dmamap_sync(), do nothing if memdesc is of type
MEMDESC_VMPAGES. The data of such memdescs are not tracked by KMSAN.

Sponsored by: Netflix
Assisted-By: Claude Code - Opus 5 (1M context)

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Repository

rG FreeBSD src repository

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Lint Skipped

Unit

Tests Skipped

Build Status

Buildable 77232
Build 74115: arc lint + arc unit

Event Timeline

chs created this revision.Thu, Sep 24, 12:09 AM

Herald added a subscriber: olce. · View Herald TranscriptThu, Sep 24, 12:09 AM

chs requested review of this revision.Thu, Sep 24, 12:09 AM

Harbormaster completed remote builds in B77232: Diff 187545.Thu, Sep 24, 12:09 AM

chs added a parent revision: D59947: kmsan: skip unmapped bios.Thu, Sep 24, 12:09 AM

chs added a child revision: D59949: kmsan: avoid false reports while processing NMIs.

imp accepted this revision.Tue, Sep 29, 10:22 PM

This revision is now accepted and ready to land.Tue, Sep 29, 10:22 PM

imp added a reviewer: jhb.Tue, Sep 29, 10:22 PM

jhb added a reviewer: markj.Tue, Oct 13, 7:46 PM

Tagged @markj

kmsan_check_mbuf() is missing a check for M_EXTPG mbufs. kmsan_mark_mbuf() does check for M_EXTPG.

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sys/

kern/

subr_msan.c

4 lines

Diff 187545

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kmsan: skip memdescs of type MEMDESC_VMPAGESAcceptedPublicActions