We have a condition that occurs when we boot where we see the following message and our boot fails because of it. DEBUG ((EFI_D_ERROR, "Found a FFS3 formatted section in a non-FFS3 formatted FV.\n"));
Which is on line 773 of FwVol.c ( https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Core/Pei/FwVol/FwVol.c ) The condition is caused by a large firmware volume (greater than 16mb) that is compressed and put into a smaller FV (less than 16mb). My question is why isn't this allowed (seems like a valid scenario). Volinfo supports this and decodes binary fine. The PI Vol 3 spec has a section 3.2.2 EFI_FIRMWARE_FILE_SYSTEM3_GUID which says FileSystem2 doesn't support large files but it seems that the code is not taking into account that the section is compressed and therefore you can have a large file inside a compressed section inside a FV with File System2. Feedback/thoughts/comments/Bug? Here are some details of my scenario. Compressed FV has filesystem == 8c8ce578-8a3d-4f1c-9935-896185c32dd3 (ffs3) Non compressed FV has filesystem == 5473c07a-3dcb-4dca-bd6f-1e9689e7349a (ffs2) VolInfo dump of the Non Compressed FV showing the nested/compressed FV inside. Decoding VolInfo Version 1.0 Build Build 20909 Signature: _FVH (4856465F) Attributes: 4FEFF EFI_FVB2_READ_DISABLED_CAP EFI_FVB2_READ_ENABLED_CAP EFI_FVB2_READ_STATUS EFI_FVB2_WRITE_DISABLED_CAP EFI_FVB2_WRITE_ENABLED_CAP EFI_FVB2_WRITE_STATUS EFI_FVB2_LOCK_CAP EFI_FVB2_LOCK_STATUS EFI_FVB2_STICKY_WRITE EFI_FVB2_MEMORY_MAPPED EFI_FVB2_ERASE_POLARITY EFI_FVB2_READ_LOCK_CAP EFI_FVB2_READ_LOCK_STATUS EFI_FVB2_WRITE_LOCK_CAP EFI_FVB2_WRITE_LOCK_STATUS EFI_FVB2_ALIGNMENT_16 EFI_FVB2_ALIGNMENT_32 EFI_FVB2_ALIGNMENT_64 EFI_FVB2_ALIGNMENT_128 EFI_FVB2_ALIGNMENT_4K EFI_FVB2_ALIGNMENT_8K EFI_FVB2_ALIGNMENT_16K EFI_FVB2_ALIGNMENT_32K EFI_FVB2_ALIGNMENT_1M EFI_FVB2_ALIGNMENT_2M EFI_FVB2_ALIGNMENT_4M EFI_FVB2_ALIGNMENT_8M EFI_FVB2_ALIGNMENT_256M EFI_FVB2_ALIGNMENT_512M EFI_FVB2_ALIGNMENT_1G EFI_FVB2_ALIGNMENT_2G Header Length: 0x00000048 File System ID: 5473c07a-3dcb-4dca-bd6f-1e9689e7349a Revision: 0x0002 Number of Blocks: 0x00000028 Block Length: 0x00010000 Total Volume Size: 0x00280000 ============================================================ File Name: 9E21FD93-9C72-4C15-8C4B-E77F1DB2D792 File Offset: 0x00000048 File Length: 0x001F3FFD File Attributes: 0x00 File State: 0xF8 EFI_FILE_DATA_VALID File Type: 0x0B EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE ------------------------------------------------------------ Type: EFI_SECTION_GUID_DEFINED Size: 0x001F3FE5 SectionDefinitionGuid: ee4e5898-3914-4259-9d6e-dc7bd79403cf DataOffset: 0x0018 Attributes: 0x0001 ------------------------------------------------------------ Type: EFI_SECTION_RAW Size: 0x00000FF8 ------------------------------------------------------------ Type: EFI_SECTION_FIRMWARE_VOLUME_IMAGE Size: 0x01010008 ============================================================ Thanks Sean _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
