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Bug 604875

Summary: memory usage in wipefs(8)
Product: Red Hat Enterprise Linux 6 Reporter: Karel Zak <kzak>
Component: util-linux-ngAssignee: Karel Zak <kzak>
Status: CLOSED CURRENTRELEASE QA Contact: Martin Cermak <mcermak>
Severity: medium Docs Contact:
Priority: low    
Version: 6.0CC: azelinka, mcermak, ovasik, syeghiay
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: util-linux-ng-2.17.2-4.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-11-10 21:52:45 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Karel Zak 2010-06-16 21:47:00 UTC
Description of problem:

# valgrind --leak-check=no wipefs /dev/sda1

==18777== Memcheck, a memory error detector
==18777== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==18777== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==18777== Command: wipefs /dev/sda1
==18777== Warning: noted but unhandled ioctl 0x5331 with no size/direction hints
==18777==    This could cause spurious value errors to appear.
==18777==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on writing a proper wrapper.
==18777== Invalid write of size 1
==18777==    at 0x4A06ACC: memcpy (mc_replace_strmem.c:497)
==18777==    by 0x40183B: ??? (in /sbin/wipefs)
==18777==    by 0x388841EBEC: (below main) (in /lib64/
==18777==  Address 0x4c34811 is 1 bytes after a block of size 0 alloc'd
==18777==    at 0x4A0515D: malloc (vg_replace_malloc.c:195)
==18777==    by 0x401816: ??? (in /sbin/wipefs)
==18777==    by 0x388841EBEC: (below main) (in /lib64/
offset               type
0x438                ext3   [filesystem]
                     LABEL: /boot
                     UUID:  f1cd38fa-c887-4ab8-834b-c8ee659b97fe

==18777== HEAP SUMMARY:
==18777==     in use at exit: 131 bytes in 6 blocks
==18777==   total heap usage: 80 allocs, 74 frees, 40,939 bytes allocated
==18777== For a detailed leak analysis, rerun with: --leak-check=full
==18777== For counts of detected and suppressed errors, rerun with: -v
==18777== ERROR SUMMARY: 2 errors from 1 contexts (suppressed: 6 from 6)

The "Invalid write" means that application writes outside allocated memory. Fixed by upstream commit 9683e327eda75bf7f47e9d058cea9ff9445d58e4. 

It's one line patch, easy to verify by valgrind.

Comment 1 RHEL Product and Program Management 2010-06-16 23:12:54 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for

Comment 4 Karel Zak 2010-06-28 18:06:55 UTC
Fixed in util-linux-ng-2.17.2-4.el6

Comment 8 Martin Cermak 2010-09-16 10:51:46 UTC

Comment 9 2010-11-10 21:52:45 UTC
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.