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Differential D58896

netmap: Use ckdint.h helpers to check for overflow
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Authored by markj on Aug 17 2026, 6:43 PM.
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vmaffione
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rGd6f5c6531e48: netmap: Use ckdint.h helpers to check for overflow
Summary

This addresses a bug in the addition overflow check added in commit
319414a926af ("netmap: Handle overflow when computing ring sizes"): that
overflow wasn't actually caught by the check because "len" is promoted
to size_t.

Fixes: 319414a926af ("netmap: Handle overflow when computing ring sizes")

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rG FreeBSD src repository
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Event Timeline

markj created this revision.Aug 17 2026, 6:43 PM
Herald added a subscriber: imp. · View Herald TranscriptAug 17 2026, 6:43 PM
markj requested review of this revision.Aug 17 2026, 6:43 PM
Harbormaster completed remote builds in B75656: Diff 184212.Aug 17 2026, 6:43 PM
This revision was not accepted when it landed; it landed in state Needs Review.Thu, Aug 27, 1:33 PM
Closed by commit rGd6f5c6531e48: netmap: Use ckdint.h helpers to check for overflow (authored by markj). · Explain Why
This revision was automatically updated to reflect the committed changes.
markj added a commit: rGd6f5c6531e48: netmap: Use ckdint.h helpers to check for overflow.

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sys/
dev/
netmap/
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sys/dev/netmap/netmap_mem2.c

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