loader.efi: efi_redirect_exceptions does use uninitialized pointer
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Authored by tsoome on Feb 8 2026, 11:02 AM.

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manu
kib

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rG23605a8e5124: loader.efi: efi_redirect_exceptions does use uninitialized pointer

Summary

loader_idt.rd_base is not set when we are attempting to bcopy(),
resulting to data stored to page 0 and therefore corrupting it.

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rG FreeBSD src repository

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Event Timeline

tsoome created this revision.Feb 8 2026, 11:02 AM

Herald added a reviewer: manu. · View Herald TranscriptFeb 8 2026, 11:02 AM

Herald added subscribers: dab, bcran, imp. · View Herald Transcript

tsoome requested review of this revision.Feb 8 2026, 11:02 AM

tsoome added a parent revision: D55179: loader.efi: free_tables() appears to free tss_pa twice..

Harbormaster completed remote builds in B70518: Diff 171448.Feb 8 2026, 11:02 AM

kib accepted this revision.Feb 8 2026, 12:03 PM

This revision is now accepted and ready to land.Feb 8 2026, 12:03 PM

Closed by commit rG23605a8e5124: loader.efi: efi_redirect_exceptions does use uninitialized pointer (authored by tsoome). · Explain WhyFeb 21 2026, 3:30 PM

This revision was automatically updated to reflect the committed changes.

tsoome added a commit: rG23605a8e5124: loader.efi: efi_redirect_exceptions does use uninitialized pointer.

bms added a subscriber: bms.Feb 21 2026, 3:51 PM

Revision Contents
Changeset List

Path

Size

stand/

efi/

loader/

arch/

amd64/

trap.c

1 line

Diff 172386

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stand/efi/loader/arch/amd64/trap.c

loader.efi: efi_redirect_exceptions does use uninitialized pointerClosedPublicActions