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Assert only valid flag bits are passed to visibilitymap_set()

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If visibilitymap_set() is called with flags containing a higher bit than
VISIBILITYMAP_ALL_FROZEN, the state of neighboring pages is affected. While
there was an assertion that *some* valid bits were set, it did not check
that *only* valid bits were. Change that.

Discussion: https://postgr.es/m/20230331043300.gux3s5wzrapqi4oe@awork3.anarazel.de
This commit is contained in:
Andres Freund 2023-04-01 17:55:33 -07:00
parent 14f98e0af9
commit a88a18b125
1 changed files with 1 additions and 1 deletions
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2
src/backend/access/heap/visibilitymap.c
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@ -259,9 +259,9 @@ visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf,
Assert(InRecovery || XLogRecPtrIsInvalid(recptr));
Assert(InRecovery || PageIsAllVisible((Page) BufferGetPage(heapBuf)));
Assert((flags & VISIBILITYMAP_VALID_BITS) == flags);
/* Must never set all_frozen bit without also setting all_visible bit */
Assert(flags & VISIBILITYMAP_VALID_BITS);
Assert(flags != VISIBILITYMAP_ALL_FROZEN);
/* Check that we have the right heap page pinned, if present */