Bug 604210
| Summary: | Segmentation fault when check preallocated qcow2 image on lvm. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | lihuang <lihuang> |
| Component: | qemu-kvm | Assignee: | Kevin Wolf <kwolf> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 6.0 | CC: | kwolf, llim, mkenneth, quintela, tburke, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.82.el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-07-03 18:55:14 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux major release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Major release. This request is not yet committed for inclusion. (In reply to comment #0) > Description of problem: > the lvm is 2g. > > [root@t70 qemu-kvm-0.12.1.2]# lvs > LV VG Attr LSize Origin Snap% Move Log Copy% Convert > ... > lvtest vgtest -wi-a- 2.00g > > the qcow2 is created as 20G > qemu-img create -f qcow2 -o preallocation=metadata /dev/vgtest/lvtest 20G > > run qemu-img check on the image got the crash. > > ERROR: invalid cluster offset=0x1100010000000000 > > Core was generated by `qemu-img check -f qcow2 /dev/vgtest/lvtest'. > Program terminated with signal 11, Segmentation fault. > #0 0x000000000041f3aa in qcow2_check_refcounts (bs=0x1f662e0) > at block/qcow2-refcount.c:1098 > 1098 if (refcount_table[offset / s->cluster_size] != 1) { > Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.2.el6.x86_64 > libaio-0.3.107-10.el6.x86_64 zlib-1.2.3-24.el6.x86_64 Why not install the above and provide a better backtrace? > (gdb) bt > #0 0x000000000041f3aa in qcow2_check_refcounts (bs=0x1f662e0) > at block/qcow2-refcount.c:1098 A bit of check on the value of s->cluster_size and possibly the other variables in line 1098 would have produced a much better bug report. > #1 0x0000000000403bf1 in img_check (argc=<value optimized out>, > argv=<value optimized out>) at qemu-img.c:420 > #2 0x00000031d641ec5d in __libc_start_main () from /lib64/libc.so.6 > #3 0x0000000000402d09 in _start () > Tested on qemu-kvm-0.12.1.2-2.82.el6. 1. qemu-img reporting right error message wheh checking the faulty image (lv) in #c0 qemu-img check -f qcow2 /dev/vgtest/lvtest ERROR refcount block 8191 is outside image 1 errors were found on the image. 2. can not create image when offset is outside image . [root@t70 82]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert lvtest vgtest -wi-a- 2.00g [root@t70 82]# qemu-img create -f qcow2 -o preallocation=metadata /dev/vgtest/lvtest 2G Formatting '/dev/vgtest/lvtest', fmt=qcow2 size=10737418240 encryption=off cluster_size=0 preallocation='metadata' qemu-img: /dev/vgtest/lvtest: error while creating qcow2: Input/output error (In reply to comment #8) > Tested on qemu-kvm-0.12.1.2-2.82.el6. > > 1. qemu-img reporting right error message wheh checking the faulty image (lv) > in #c0 > > qemu-img check -f qcow2 /dev/vgtest/lvtest > ERROR refcount block 8191 is outside image > 1 errors were found on the image. > > > 2. can not create image when offset is outside image . > [root@t70 82]# lvs > LV VG Attr LSize Origin Snap% Move Log Copy% Convert > lvtest vgtest -wi-a- 2.00g > > [root@t70 82]# qemu-img create -f qcow2 -o preallocation=metadata > /dev/vgtest/lvtest 2G > Formatting '/dev/vgtest/lvtest', fmt=qcow2 size=10737418240 encryption=off > cluster_size=0 preallocation='metadata' > qemu-img: /dev/vgtest/lvtest: error while creating qcow2: Input/output error 3. create qcow2 without preallocation. full installation RHEL5.5 guest on with the image. run qemu-img check when the guest is PAUSED on enospc error. --> there is some harmless warnning. but no segfault. |
Description of problem: the lvm is 2g. [root@t70 qemu-kvm-0.12.1.2]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert ... lvtest vgtest -wi-a- 2.00g the qcow2 is created as 20G qemu-img create -f qcow2 -o preallocation=metadata /dev/vgtest/lvtest 20G run qemu-img check on the image got the crash. ERROR: invalid cluster offset=0x1100010000000000 Core was generated by `qemu-img check -f qcow2 /dev/vgtest/lvtest'. Program terminated with signal 11, Segmentation fault. #0 0x000000000041f3aa in qcow2_check_refcounts (bs=0x1f662e0) at block/qcow2-refcount.c:1098 1098 if (refcount_table[offset / s->cluster_size] != 1) { Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.2.el6.x86_64 libaio-0.3.107-10.el6.x86_64 zlib-1.2.3-24.el6.x86_64 (gdb) bt #0 0x000000000041f3aa in qcow2_check_refcounts (bs=0x1f662e0) at block/qcow2-refcount.c:1098 #1 0x0000000000403bf1 in img_check (argc=<value optimized out>, argv=<value optimized out>) at qemu-img.c:420 #2 0x00000031d641ec5d in __libc_start_main () from /lib64/libc.so.6 #3 0x0000000000402d09 in _start () Version-Release number of selected component (if applicable): qemu-kvm-0.12.1.2-2.74.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: