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[Qemu-devel] [Bug 1349972] [NEW] qcow2-refcount: qemu-io crashes on 'dis
From: |
Maria Kustova |
Subject: |
[Qemu-devel] [Bug 1349972] [NEW] qcow2-refcount: qemu-io crashes on 'discard' command |
Date: |
Tue, 29 Jul 2014 18:07:11 -0000 |
Public bug reported:
qemu-io is killed by SIGIOT at the 'discard' command on the image having
no refcount information.
Sequence:
1. Unpack test.img and backing_img.qed in the same directory (see the attached
archives for images)
2. Make a copy of test.img to copy.img (qemu-io modifies the image before being
kill, therefore the image backup is necessary)
3. Run the command
qemu-io copy.img -c 'discard 2210816 2856448'
Result: qemu-io is killed by SIGIOT with the reason:
qemu-io: block/qcow2-refcount.c:468: update_refcount_discard: Assertion
`d->bytes + length == new_end - new_start' failed.
The image was generated by the image fuzzer.
qemu.git HEAD: 1d80eb7a680d
** Affects: qemu
Importance: Undecided
Status: New
** Attachment added: "images.n.traces.tar.gz"
https://bugs.launchpad.net/bugs/1349972/+attachment/4165308/+files/images.n.traces.tar.gz
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https://bugs.launchpad.net/bugs/1349972
Title:
qcow2-refcount: qemu-io crashes on 'discard' command
Status in QEMU:
New
Bug description:
qemu-io is killed by SIGIOT at the 'discard' command on the image
having no refcount information.
Sequence:
1. Unpack test.img and backing_img.qed in the same directory (see the
attached archives for images)
2. Make a copy of test.img to copy.img (qemu-io modifies the image before
being kill, therefore the image backup is necessary)
3. Run the command
qemu-io copy.img -c 'discard 2210816 2856448'
Result: qemu-io is killed by SIGIOT with the reason:
qemu-io: block/qcow2-refcount.c:468: update_refcount_discard:
Assertion `d->bytes + length == new_end - new_start' failed.
The image was generated by the image fuzzer.
qemu.git HEAD: 1d80eb7a680d
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