Re: [PATCH v3 05/10] ACPI: extlog: Validate PCIe error section length before payload access

On Fri, Jul 17, 2026 at 09:16:42AM -0700, Dave Jiang wrote:
> sashiko-bot flagged the missing section-length check before
> extlog_print_pcie() touches the PCIe payload.
> 
> extlog_print_pcie() reads pcie_err->validation_bits and device_id and
> copies the 96-byte aer_info buffer without checking that
> gdata->error_data_length is large enough for a struct cper_sec_pcie.
> cper_estatus_check() keeps the read within the estatus block, but a
> short section still lets stale adjacent bytes be treated as PCIe error
> data. Reject a section too small to hold the record before touching any
> field.
> 
> Reported-by: [email protected]
> Fixes: e778ffefa34d ("ACPI: extlog: Trace CPER PCI Express Error Section")
> Assisted-by: Claude:claude-opus-4-8
> Signed-off-by: Dave Jiang <[email protected]>

Reviewed-by: Alison Schofield <[email protected]>