Fix possible out of bound read in armv8_crc32c
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Authored by jhb on Sep 5 2025, 7:33 PM.

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rG5660178fd14b: Fix possible out of bounds read in armv8_crc32c
rG64b51d35cef5: Fix possible out of bounds read in armv8_crc32c
rGf48b1a34ef85: Fix possible out of bounds read in armv8_crc32c

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Obtained from: CheriBSD

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rG FreeBSD src repository

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Buildable 66851
Build 63734: arc lint + arc unit

Event Timeline

jhb created this revision.Sep 5 2025, 7:33 PM

Herald added subscribers: emaste, imp. · View Herald TranscriptSep 5 2025, 7:33 PM

jhb requested review of this revision.Sep 5 2025, 7:33 PM

Harbormaster completed remote builds in B66851: Diff 161616.Sep 5 2025, 7:33 PM

I tested this in QEMU by using an NVMeoF connection using CRC32 digests over to another x86 VM running the target side of the NVMeoF connection.

andrew accepted this revision.Sep 9 2025, 1:55 PM

This revision is now accepted and ready to land.Sep 9 2025, 1:55 PM

Closed by commit rGf48b1a34ef85: Fix possible out of bounds read in armv8_crc32c (authored by Zhongqi Zhao <zz479@cam.ac.uk>, committed by jhb). · Explain WhySep 10 2025, 2:22 PM

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rGf48b1a34ef85: Fix possible out of bounds read in armv8_crc32c.

jhb added a commit: rG64b51d35cef5: Fix possible out of bounds read in armv8_crc32c.Fri, Oct 10, 9:05 PM

Herald added a reviewer: cheri. · View Herald TranscriptFri, Oct 10, 9:05 PM

jhb added a commit: rG5660178fd14b: Fix possible out of bounds read in armv8_crc32c.Fri, Oct 10, 9:05 PM

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sys/

libkern/

arm64/

crc32c_armv8.S

8 lines

Diff 161616

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sys/libkern/arm64/crc32c_armv8.S

Fix possible out of bound read in armv8_crc32cClosedPublicActions