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rust-osdev / uefi-rs

Star 808
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`Handle` may be dropped by firmware unexpectedly, leading to unsoundness

4
timrobertsdev
timrobertsdev commented Feb 14, 2022

Affected: Firmware targeting EFI < 1.10 and UEFI drivers that do not use BootServices.open_protocol and BootServices.close_protocol.

Prior to EFI 1.10, the EFI_BOOT_SERVICES.UninstallProtocolInterface function lacks the safety checks that were added in 1.10. It simply removes a protocol from a handle, and if the last protocol is removed from a handle, that handle is freed by firmware and

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bug help wanted good first issue

Foxboron / sbctl

Sponsor
Star 477
Open

Make issue template

1
Foxboron
Foxboron commented Dec 29, 2021

Issues should demand people attach the following outputs:

  • sudo sbctl status
  • sudo hexdump -C /sys/firmware/efi/efivars/PK-8be4df61-93ca-11d2-aa0d-00e098032b8c

And we should preferably implement sudo sbctl debug as a hidden command so we can have some better structured data we can use for debugging.

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good first issue
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