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Diffstat (limited to 'results/classifier/deepseek-1/output/files/1349972')
| -rw-r--r-- | results/classifier/deepseek-1/output/files/1349972 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/results/classifier/deepseek-1/output/files/1349972 b/results/classifier/deepseek-1/output/files/1349972 new file mode 100644 index 000000000..9f3089b34 --- /dev/null +++ b/results/classifier/deepseek-1/output/files/1349972 @@ -0,0 +1,41 @@ + + qcow2-refcount: qemu-io crashes on 'discard' command + +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 + + + +FWIW: + +While trying to restore (apply) a snapshot on a Windows VM (ie: qemu-img snapshot -a snapshotname windows.qcow2 where the image file is 150gb in size,) I got the above error: + +qemu-img: /build/buildd/qemu-2.0.0+dfsg/block/qcow2-refcount.c:467: update_refcount_discard: Assertion `d->bytes + length == new_end - new_start' failed. + +(My VM is now broken.) + +This is the only reference that I found using Google. + +HTH + +I sent a patch that fixes the original problem that Maria reported. It's hard to say whether this is the same problem as you saw, Sam, but it's quite possible. + +Fix has been included here: +http://git.qemu.org/?p=qemu.git;a=commitdiff;h=ecbda7a22576591a84 +... so I think it should be OK now to mark this ticket as fixed. + |