https://bugs.kde.org/show_bug.cgi?id=452147
Bug ID: 452147
Summary: Ark truncates/does not fully unpack .gz gzip files
with trailing data
Product: ark
Version: 21.12.2
Platform: Other
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: elvis.angelac...@kde.org
Reporter: valdi...@gmail.com
CC: aa...@kde.org, rthoms...@gmail.com
Target Milestone: ---
SUMMARY
KDE Ark discards (or does not handle correctly) the latest compressed gzip
block if it contains trailing "garbage", *silently* producing truncated
unpacked file.
STEPS TO REPRODUCE
1. Download
https://downloads.openwrt.org/releases/21.02.0/targets/x86/generic/openwrt-21.02.0-x86-generic-generic-ext4-combined.img.gz
2. Unpack it with Ark
3. Get the unpacked file 126 337 024 bytes in size
OBSERVED RESULT
The resulting file is truncated to 126 337 024 bytes, does not work as intended
(disk image does not boot).
EXPECTED RESULT
The resulting file is 126 353 408 bytes in size (16 KiB more), as unpacked with
gunzip.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 35
KDE Plasma Version: 5.24.3
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Kernel Version: 5.16.17-200.fc35.x86_64 (64-bit)
ADDITIONAL INFORMATION
OpenWRT build system appends signature metadata to the end of .gz file, which
for uncompressing program looks like a trailing garbage.
However, gunzip correctly uncompresses the file while Ark seem to discard the
last compressed block, silently unpacking incomplete file.
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