Bug 1316098 - cpio crashes with segfault
cpio crashes with segfault
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: cpio (Show other bugs)
Unspecified Linux
unspecified Severity medium
: rc
: ---
Assigned To: Pavel Raiskup
Depends On:
  Show dependency treegraph
Reported: 2016-03-09 07:12 EST by Bill Craig
Modified: 2016-03-10 01:21 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2016-03-10 01:21:03 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
File list /tmp/cfl2 (4.90 MB, text/plain)
2016-03-09 07:12 EST, Bill Craig
no flags Details

  None (edit)
Description Bill Craig 2016-03-09 07:12:56 EST
Created attachment 1134491 [details]
File list /tmp/cfl2

Description of problem:
Attempts to create cpio archive of Centos 7 server fail when cpio crashes and logs a segfault in /var/log/messages

[root@linux ~]# grep segf /var/log/messages
Mar  8 13:28:51 edplinux kernel: cpio[30891]: segfault at 176b0ca ip 00007f3365f
38e10 sp 00007fff0abc6d78 error 4 in libc-2.17.so[7f3365df9000+1b6000]
Mar  8 18:06:38 edplinux kernel: cpio[31774]: segfault at 203809a ip 00007f1e21b
e1e10 sp 00007fffc873e168 error 4 in libc-2.17.so[7f1e21aa2000+1b6000]
Mar  8 18:25:46 edplinux kernel: cpio[31993]: segfault at 1ed7000 ip 00007f1e7f9
cc977 sp 00007fffcf9efd88 error 4 in libc-2.17.so[7f1e7f88c000+1b6000]
Mar  8 22:05:09 edplinux kernel: cpio[23842]: segfault at 240409a ip 00007fb5a31
d1e10 sp 00007fff7c312318 error 4 in libc-2.17.so[7fb5a3092000+1b6000]

Version-Release number of selected component (if applicable):
[root@linux ~]# uname -a
Linux linux 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x
86_64 x86_64 GNU/Linux

[root@linux /]# rpm -q centos-release

[root@linux ~]# cpio --version
cpio (GNU cpio) 2.11

[root@linux ~]# rpm -q cpio

How reproducible:

Steps to Reproduce:
cd /

find ./ -name proc -prune -o -print | egrep -v '^\./u/backup5|^\./usr/guests/|^\./u/idata*|^\./tmp/' | egrep -v '^\./tmp"|^\./u/u1a|^\./u/u1b|^\./u/u1c|^\./u/u2a|^\./u/u2b|^\./var/spool/uucppublic' > /tmp/cfl2

cat /tmp/cfl2 | cpio -Bocv | gzip -f | dd of=/tmp/cpiobusys.gz

Actual results:
Creates incomplete archive crashing at this point:
186731+1 records in
186731+1 records out
95606439 bytes (96 MB) copied, 7.23648 s, 13.2 MB/s

Expected results:

Additional info:
Removed file names from the start of the list and reran.
It went past the previous crash point and failed here:

cpio: ./sys/devices/pnp0/00:01/firmware_node: Warning: Cannot readlink: Invalid argument
cpio: ./sys/devices/pnp0/00:02/driver: Warning: Cannot readlink: Invalid argument
cpio: ./sys/devices/pnp0/00:02/subsystem: Warning: Cannot readlink: Invalid argument
3+1 records in
3+1 records out
1639 bytes (1.6 kB) copied, 0.00952303 s, 172 kB/s
[root@linux /]#

Mar  9 11:44:35 edplinux kernel: cpio[25835]: segfault at 1c8c0ca ip 00007feb446
dee10 sp 00007fff2f1debb8 error 4 in libc-2.17.so[7feb4459f000+1b6000]
Comment 2 Pavel Raiskup 2016-03-10 01:21:03 EST
Thanks for the report, but this should have been fixed already.
Have a look at cpio-2.11-24.el7_2.

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