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AssumptionFailed { reason: "outside long mode, block group desc size must be zero, not 32" } #4

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surban opened this issue Sep 27, 2020 · 0 comments · May be fixed by #9
Open

AssumptionFailed { reason: "outside long mode, block group desc size must be zero, not 32" } #4

surban opened this issue Sep 27, 2020 · 0 comments · May be fixed by #9

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@surban
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surban commented Sep 27, 2020

I am getting this error trying to read an ext4 filesystem extracted from an Android device. The filesystem mounts fine on a standard Linux kernel and fsck.ext4 reports no errors.

Commenting out the corresponding check in parse.rs allows ext4-rs to parse the filesystem and correctly extract files from it.

However I am afraid that we might introduce data corruption issues by simply skipping this check.
surban added a commit to ENQT-GmbH/ext4-rs that referenced this issue Jan 27, 2022
@surban
Add option to disable check of blk group dsc size
16e7e03 
If set to true, the check that the block group descriptor size is zero
outside long mode is skipped. This is necessary to read some ext4
filesystems created by possibly buggy tools or kernels.

Fixes FauxFaux#4.
@surban surban linked a pull request Jan 27, 2022 that will close this issue
Open
pirroman pushed a commit to passware/ext4-rs that referenced this issue Nov 22, 2022
Pull request FauxFaux#4: Ext4: Поправлена расшифровка для зашифрованн…
e02013c 
…ых нод

Merge in CRATES/ext4-rs from cases/PKM-1243-generic-crypto to without_state_verification

* commit '0ac09052ce27fce6771836e454af1234d0771b4c':
  [PKM-1243] change panic behavior to throw errors
  [PKM-1243] use matches macro
  [PKM-1243] use trim
  [PKM-1243] use slice
  [PKM-1243] fixed errors
  [PKM-1243] clean code
  [PKM-1243] ref inner
  [PKM-1243] fixed decrypt page
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Add option to disable check of blk group dsc size ENQT-GmbH/ext4-rs
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@surban