New: gunzip fails to uncompress files

https://bugs.busybox.net/show_bug.cgi?id=8501

Summary: gunzip fails to uncompress files
Product: buildroot
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: major
Priority: P5
Component: Other
AssignedTo: unassigned at buildroot.uclibc.org
ReportedBy: rush0033 at hotmail.com
CC: buildroot at uclibc.org
Estimated Hours: 0.0

Created attachment 6231
--> https://bugs.busybox.net/attachment.cgi?id=6231
Buildroot .config file

In buildroot-2015.11, the busybox gunzip applet fails to uncompress some files, even those created with the busybox gzip applet. There is no error information printed to the screen, but the value of the exit code (e.g. echo $?) is 1. The issue appears to be related to the content of the files.

For example, these steps work correctly:
dd if=/dev/urandom bs=512 count=10000 of=test_random gzip test_random
gunzip test_random.gz

However, these steps fail to uncompress the file:
dd if=/dev/zero bs=512 count=10000 of=test_zero
gzip test_zero
gunzip test_zero.gz

The test_zero.gz file produced by the busybox gzip applet can be uncompressed by another computer running Linux. So it appears to be a valid file.

This issue did not exist in 2015.11-rc1, but appears to have manifested in 2015.11-rc2 and is still present in the final release of 2015.11.

This issue occurs with a clean stock x86 build of buildroot. The .config file used is attached.

Linux Kernel: 3.18.24 x86_64
Buildroot userland running as an x86 32-bit initrd image

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https://bugs.busybox.net/show_bug.cgi?id=8501

Arnout Vandecappelle <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at buildroot.uclibc |arnout at mind.be
                   |.org                        |

--- Comment #1 from Arnout Vandecappelle <[email protected]> 2015-12-01 20:21:29 UTC --- That's due to 0002-unzip.patch; upstream has got an additional fix in 6bd3fff51aa74e2ee2d87887b12182a3b09792ef. I'll add it.

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https://bugs.busybox.net/show_bug.cgi?id=8501

--- Comment #2 from Jason Rush <[email protected]> 2015-12-01 22:16:45 UTC --- I added the patch for upstream commit 6bd3fff51aa74e2ee2d87887b12182a3b09792ef to my local tree, and I can confirm that fixes the issue.

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https://bugs.busybox.net/show_bug.cgi?id=8501

Peter Korsgaard <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #3 from Peter Korsgaard <[email protected]> --- Fixed in git and will be part of 2015.11.1, thanks.

commit 63fdab6b4fcc860abd8dbc8342c7b01643a37e1a

Author: Arnout Vandecappelle (Essensium/Mind) <[email protected]>
Date:   Tue Dec 1 21:30:29 2015 +0100

busybox: add another upstream patch to fix (g)unzip

0002-unzip.patch was added in 69516e0 to fix a segmentation fault in the gunzip applet. However, it introduced a new issue that made the unzipping of some files fail.

Add an upstream patch that fixes this new issue.

Fixes #8501.

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