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Differential D48629

vm_phys_avail_count(): Fix out-of-bounds accesses
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Authored by olce on Jan 23 2025, 5:15 PM.
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markj
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alc
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rG7658c4f8c727: vm_phys_avail_count(): Fix out-of-bounds accesses
rG291b7bf071e8: vm_phys_avail_count(): Fix out-of-bounds accesses
Summary

On improper termination of phys_avail[] (two consecutive 0 starting at
an even index), this function would (unnecessarily) continue searching
for the termination markers even if the index was out of bounds.

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rG FreeBSD src repository
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Build Status
Buildable 61928
Build 58812: arc lint + arc unit

Event Timeline

olce created this revision.Jan 23 2025, 5:15 PM
Herald added a subscriber: imp. · View Herald TranscriptJan 23 2025, 5:15 PM
olce requested review of this revision.Jan 23 2025, 5:15 PM
Harbormaster completed remote builds in B61928: Diff 149785.Jan 23 2025, 5:15 PM
olce added a parent revision: D48628: vm_phys: Check for overlap when adding a segment.Jan 23 2025, 5:21 PM
olce added a child revision: D48630: vm_phys_avail_split(): Tolerate split requests at boundaries.
markj added inline comments.Jan 24 2025, 2:47 PM
sys/vm/vm_phys.c
1784
olce updated this revision to Diff 150690.Feb 7 2025, 5:20 PM
olce marked an inline comment as done.

Fix spacing.

Harbormaster completed remote builds in B62296: Diff 150690.Feb 7 2025, 5:20 PM
olce added a comment.Feb 7 2025, 5:20 PM

Spacing fixed.

markj accepted this revision.Feb 18 2025, 8:05 PM
This revision is now accepted and ready to land.Feb 18 2025, 8:05 PM
Closed by commit rG291b7bf071e8: vm_phys_avail_count(): Fix out-of-bounds accesses (authored by olce). · Explain WhyFeb 19 2025, 2:14 PM
This revision was automatically updated to reflect the committed changes.
olce added a commit: rG291b7bf071e8: vm_phys_avail_count(): Fix out-of-bounds accesses.
olce added a commit: rG7658c4f8c727: vm_phys_avail_count(): Fix out-of-bounds accesses.Apr 8 2025, 1:41 PM

Revision Contents
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sys/
vm/
10 lines

Diff 149785

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sys/vm/vm_phys.c

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