This service will be undergoing maintenance at 00:00 UTC, 2017-10-23 It is expected to last about 30 minutes
Bug 1003846 - qemu-io core dump when read 2000PB vmdk disk
qemu-io core dump when read 2000PB vmdk disk
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm (Show other bugs)
x86_64 Linux
low Severity low
: rc
: ---
Assigned To: Fam Zheng
Virtualization Bugs
: TestOnly
Depends On: 995866
  Show dependency treegraph
Reported: 2013-09-03 07:05 EDT by Xu Han
Modified: 2014-06-17 23:35 EDT (History)
7 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2014-06-13 07:14:16 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Xu Han 2013-09-03 07:05:19 EDT
Description of problem:
qemu-io core dump when read 2000PB vmdk disk

Version-Release number of selected component (if applicable):
kernel: 3.10.0-15.el7.x86_64

How reproducible:

Steps to Reproduce:
1.#qemu-img create -f vmdk test.vmdk 2048000T
2.#qemu-io -c "read 0 512" test.vmdk

Actual results:
after step2
(process:32326): GLib-ERROR **: gmem.c:165: failed to allocate 18446744071562067968 bytes
Trace/breakpoint trap (core dumped)

Expected results:
command execute properly

Additional info:
(gdb) bt
#0  0x00007ffff76f4e0d in g_logv () from /lib64/
#1  0x00007ffff76f4ff2 in g_log () from /lib64/
#2  0x00007ffff76f38dc in g_malloc () from /lib64/
#3  0x0000555555588a40 in vmdk_init_tables (extent=0x555555c03c00, bs=0x555555bfee90) at block/vmdk.c:429
#4  0x00005555555891ac in vmdk_open_vmdk4 (bs=bs@entry=0x555555bfee90, file=file@entry=0x555555c028d0, flags=<optimized out>) at block/vmdk.c:595
#5  0x00005555555893ed in vmdk_open_sparse (bs=bs@entry=0x555555bfee90, file=0x555555c028d0, flags=<optimized out>) at block/vmdk.c:647
#6  0x000055555558996b in vmdk_open (bs=0x555555bfee90, options=<optimized out>, flags=<optimized out>) at block/vmdk.c:775
#7  0x0000555555563d37 in bdrv_open_common (bs=bs@entry=0x555555bfee90, file=0x555555c028d0, options=options@entry=0x555555c00890, 
    flags=flags@entry=24578, drv=drv@entry=0x5555557f6f40 <bdrv_vmdk>) at block.c:747
#8  0x0000555555568f51 in bdrv_open (bs=0x555555bfee90, filename=filename@entry=0x7fffffffe708 "test.vmdk", options=0x555555c00890, options@entry=0x0, 
    flags=24578, flags@entry=16386, drv=<optimized out>, drv@entry=0x0) at block.c:1066
#9  0x00005555555b128d in openfile (name=0x7fffffffe708 "test.vmdk", flags=16386, growable=<optimized out>) at qemu-io.c:1776
#10 0x0000555555560786 in main (argc=<optimized out>, argv=0x7fffffffe488) at qemu-io.c:2023

# qemu-img info test.vmdk

(process:32430): GLib-ERROR **: gmem.c:165: failed to allocate 18446744071562067968 bytes
Trace/breakpoint trap (core dumped)
Comment 2 Xu Han 2013-09-03 22:25:20 EDT
Test on rhel6.5 as well,  rhel6.5 does not hit this issue.
qemu-io report:
L1 size too big
qemu-io: can't open device test.vmdk
no file open, try 'help open'

That is expected.
Comment 4 Ademar Reis 2013-10-15 21:27:25 EDT
The fixes for bug 995866 should have fixed this one as well. Marking TestOnly and ON_QA
Comment 5 Xu Han 2013-11-17 22:09:06 EST
Verify this bug with component:

1. Generate one 2000PB vmdk disk
# qemu-img create -f vmdk test.vmdk 2048000T
2. Read disk image via qemu-io
# qemu-io -c "read 0 512" test.vmdk

After step2:
# qemu-io -c "read 0 512" test.vmdk
qemu-io: can't open device test.vmdk: L1 size too big
no file open, try 'help open'

Base on comment 0 and this test result above, this bug has been fixed.
Comment 7 Ludek Smid 2014-06-13 07:14:16 EDT
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.

Note You need to log in before you can comment on or make changes to this bug.