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Differential D45578

arm64 pmap: Release PTP reference on leaf ptpage allocation failure
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Authored by bnovkov on Jun 13 2024, 4:28 PM.
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markj
alc
kib
andrew
manu
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rG5d4545a2270e: arm64 pmap: Release PTP reference on leaf ptpage allocation failure
Summary

808f5ac fixed an edge case invloving mlock() and superpage creation
by creating and inserting a leaf pagetable page for mlock'd superpages.
However, the code does not properly release the reference to the
pagetable page in the error handling path.
This commit fixes the issue by adding calls to 'pmap_abort_ptp'
in the error handling path.

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rG FreeBSD src repository
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sys/
arm64/
arm64/
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sys/arm64/arm64/pmap.c

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