TypeError: Error while decompressing: 1

[prbluebottle]

Hi,

Running master (v0.3 tag) I get this while trying to decompress a big-endian JFFS2 filesystem from a mips_24kc architecture. Debian 10 on x64.

$ jefferson 3A0000.jffs2
duplicate inode use detected!!!
duplicate inode use detected!!!
duplicate inode use detected!!!
duplicate inode use detected!!!
duplicate inode use detected!!!
Traceback (most recent call last):
  File "/usr/local/bin/jefferson", line 513, in <module>
    main()
  File "/usr/local/bin/jefferson", line 484, in main
    fs_list = list(scan_fs(content, cstruct.BIG_ENDIAN, verbose=args.verbose))
  File "/usr/local/bin/jefferson", line 328, in scan_fs
    inode.unpack(content[0 + offset :])
  File "/usr/local/bin/jefferson", line 213, in unpack
    self.data = jffs2_lzma.decompress(node_data, self.dsize)
  File "/usr/local/lib/python3.7/dist-packages/jefferson/jffs2_lzma.py", line 20, in decompress
    decompressed = pylzma.decompress(lzma_data)
TypeError: Error while decompressing: 1

$ binwalk 3A0000.jffs2 

DECIMAL       HEXADECIMAL     DESCRIPTION
--------------------------------------------------------------------------------
0             0x0             JFFS2 filesystem, big endian

$ python3 --version
Python 3.7.3

$ pip3 list|egrep 'cstruct|pylzma'
cstruct          1.8           
pylzma           0.5.0

[managerboard]

you may try to disable duplicate node check to see if still issues.

src/scripts/jefferson

@@ def scan_fs(content, endianness, verbose=False):
dirent.unpack(content[0 + offset :], offset)
if dirent.ino in dirent_dict:
print("duplicate inode use detected!!!")
#remove below lines
fs_index += 1
fs[fs_index] = {}
fs[fs_index]["endianness"] = endianness
fs[fs_index][JFFS2_NODETYPE_INODE] = []
fs[fs_index][JFFS2_NODETYPE_DIRENT] = []
fs[fs_index][JFFS2_NODETYPE_XATTR] = []
fs[fs_index][JFFS2_NODETYPE_XREF] = []
fs[fs_index][JFFS2_NODETYPE_SUMMARY] = []
dirent_dict = {}