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Differential D49242

libdtrace: Fix an off-by-one in the priority queue implementation
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Authored by markj on Mar 5 2025, 10:59 AM.
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DTrace
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rG1cbe8781642e: libdtrace: Fix an off-by-one in the priority queue implementation
rG7ee1bdd094d3: libdtrace: Fix an off-by-one in the priority queue implementation
Summary

The zero'th index in the array is unused, so a priority queue of N elements
needs N+1 array slots. Fix the allocation.

Also fix the assertion in dt_pq_insert(): the assertion needs to be checked
after incrementing the count of items in the priority queue, otherwise it can
miss an overflow.

Reported by: CHERI
Sponsored by: Innovate UK

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rG FreeBSD src repository
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Buildable 62768
Build 59652: arc lint + arc unit

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cddl/
contrib/
opensolaris/
lib/
libdtrace/
common/
6 lines

Diff 151910

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cddl/contrib/opensolaris/lib/libdtrace/common/dt_pq.c

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