[PATCH 0/6] staging: erofs: first stage of corrupted compressed images

From: Gao Xiang
Date: Mon Aug 19 2019 - 06:35:20 EST

Hi all,

I have fuzzed EROFS for about a day and observed the following
issues due to corrupted compression images by my first fuzzer
(It seems ok for uncompressed images for now). Now it can survive
for 10+ minutes on my PC (Let me send out what I'm done and
I will dig it more deeply...)

All the fixes are trivial.

Note that those have dependency on EFSCORRUPTED, so for-next
is needed and I will manually backport them by hand due to
many cleanup patches...

Gao Xiang

Gao Xiang (6):
staging: erofs: some compressed cluster should be submitted for
corrupted images
staging: erofs: cannot set EROFS_V_Z_INITED_BIT if fill_inode_lazy
staging: erofs: add two missing erofs_workgroup_put for corrupted
staging: erofs: avoid loop in submit chains
staging: erofs: detect potential multiref due to corrupted images
staging: erofs: avoid endless loop of invalid lookback distance 0

drivers/staging/erofs/zdata.c | 46 ++++++++++++++++++++++++++---------
drivers/staging/erofs/zmap.c | 9 +++++--
2 files changed, 42 insertions(+), 13 deletions(-)