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Bug 1994194 - Qemu Core Dumped When Creating Snapshot Bases on '' Backing File
Summary: Qemu Core Dumped When Creating Snapshot Bases on '' Backing File
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: qemu-kvm
Version: 8.0
Hardware: x86_64
OS: All
medium
medium
Target Milestone: beta
: ---
Assignee: Kevin Wolf
QA Contact: Tingting Mao
URL:
Whiteboard:
Depends On: 1997410
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-08-17 02:47 UTC by Tingting Mao
Modified: 2021-12-07 22:45 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-09-17 06:05:40 UTC
Type: ---
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-93849 0 None None None 2021-08-17 14:20:28 UTC

Description Tingting Mao 2021-08-17 02:47:45 UTC 
Description of problem:
As subject.


Version-Release number of selected component (if applicable):
qemu-kvm-4.2.0-57.module+el8.5.0+12118+4998563d
kernel-4.18.0-330.el8.x86_64


How reproducible:
100%


Steps to Reproduce:
# qemu-img create -f qcow2 -b '' /home/foo
qemu-img: block.c:6024: bdrv_img_create: Assertion `full_backing' failed.
Aborted (core dumped)


Actual results:
As above, qemu core dumped.


Expected results:
Should list the hint message like below instead of core dumped.
# qemu-img create -f qcow2 -b '' foo
qemu-img: foo: Expected backing file name, got empty string


Additional info:
(gdb) bt
#0  0x00007fec2eb5237f in raise () from /lib64/libc.so.6
#1  0x00007fec2eb3cdb5 in abort () from /lib64/libc.so.6
#2  0x00007fec2eb3cc89 in __assert_fail_base.cold.0 () from /lib64/libc.so.6
#3  0x00007fec2eb4aa76 in __assert_fail () from /lib64/libc.so.6
#4  0x000055e328150b63 in bdrv_img_create (filename=0x7ffe75770342 "/home/foo", fmt=0x7ffe75770338 "qcow2", base_filename=<optimized out>, 
    base_fmt=<optimized out>, options=<optimized out>, img_size=<optimized out>, flags=0, quiet=false, errp=0x7ffe7576f000) at block.c:6024
#5  0x000055e32813c540 in img_create (argc=6, argv=0x7ffe7576f170) at qemu-img.c:574
#6  0x000055e32813ae1d in main (argc=6, argv=<optimized out>) at qemu-img.c:5385
Comment 1 Tingting Mao 2021-08-17 02:53:06 UTC 
This issue was fixed in RHELAV, refer to Bug 1809553, please.
Comment 2 Kevin Wolf 2021-08-19 11:06:39 UTC 
We're planning to rebase the qemu-kvm package for 8.6, so we'll get this automatically.
Comment 6 Tingting Mao 2021-09-17 06:05:40 UTC 
Verified this bug as below.


Tested with:
qemu-kvm-6.1.0-1.module+el8.6.0+12648+6ede71a5
kernel-4.18.0-339.el8.x86_64


Steps:
# qemu-img create -f qcow2 -b '' /home/foo
qemu-img: /home/foo: Expected backing file name, got empty string
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