netmap: Handle overflow when computing ring sizes
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Authored by markj on Aug 5 2026, 5:37 PM.

Details

Reviewers

vmaffione

Commits

rG319414a926af: netmap: Handle overflow when computing ring sizes

Summary

PR: 297300
Reported by: Robert Morris
Reported by: syzkaller

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

markj created this revision.Aug 5 2026, 5:37 PM

Herald added a subscriber: imp. · View Herald TranscriptAug 5 2026, 5:37 PM

markj requested review of this revision.Aug 5 2026, 5:37 PM

Harbormaster completed remote builds in B75397: Diff 183475.Aug 5 2026, 5:37 PM

markj added a parent revision: D58677: netmap: Fix a race in kqueue registration.Aug 5 2026, 5:37 PM

vmaffione added a subscriber: giuseppe.lettieri_unipi.it.Aug 6 2026, 7:14 AM

vmaffione requested changes to this revision.Aug 6 2026, 7:16 AM

vmaffione added inline comments.

sys/dev/netmap/netmap_mem2.c
2024	Aren't we missing `len += sizeof(struct netmap_ring)` ?

This revision now requires changes to proceed.Aug 6 2026, 7:16 AM

Add missing addition

Harbormaster completed remote builds in B75416: Diff 183537.Aug 6 2026, 1:10 PM

vmaffione accepted this revision.Aug 7 2026, 1:35 PM

This revision is now accepted and ready to land.Aug 7 2026, 1:35 PM

Closed by commit rG319414a926af: netmap: Handle overflow when computing ring sizes (authored by markj). · Explain WhyAug 7 2026, 4:30 PM

This revision was automatically updated to reflect the committed changes.

markj added a commit: rG319414a926af: netmap: Handle overflow when computing ring sizes.

Revision Contents
Changeset List

Path

Size

sys/

dev/

netmap/

netmap_mem2.c

22 lines

Diff 183630

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sys/dev/netmap/netmap_mem2.c

netmap: Handle overflow when computing ring sizesClosedPublicActions