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305e8a8a5c
Could be reached via few of our lvm2 test cases: ==11501== Invalid read of size 8 ==11501== at 0x49B2E0: _area_length (import-extents.c:204) ==11501== by 0x49B40C: _read_linear (import-extents.c:222) ==11501== by 0x49B952: _build_segments (import-extents.c:323) ==11501== by 0x49B9A0: _build_all_segments (import-extents.c:334) ==11501== by 0x49BB4C: import_extents (import-extents.c:364) ==11501== by 0x497655: _format1_vg_read (format1.c:217) ==11501== by 0x47E43E: _vg_read (metadata.c:2901) cut from t-vgcvgbackup-usage.sh -- pvcreate -M1 $(cat DEVICES) vgcreate -M1 -c n $vg $(cat DEVICES) lvcreate -l1 -n $lv1 $vg $dev1 -- Idea of the fix is rather defensive - to allocate one extra element to 'map' array which is then used in _area_length() - where the loop checks, whether next map entry is continuous. By placing there always one extra zero entry - we fix the read of unallocated memory, and we make sure the data would not make a continous block. FIXME: there could be a problem if some special broken lvm1 data would be imported. As the format1 is currently not really used - leave it for future fix and use this small hotfix for now.
This tree contains the LVM2 and device-mapper tools and libraries. For more information about LVM2 read the changelog in the WHATS_NEW file. Installation instructions are in INSTALL. There is no warranty - see COPYING and COPYING.LIB. Tarballs are available from: ftp://sources.redhat.com/pub/lvm2/ To access the CVS tree use: cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 login CVS password: cvs cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 co LVM2 Mailing list for general discussion related to LVM2: linux-lvm@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for LVM2 development, patches and commits: lvm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm Mailing list for device-mapper development, including kernel patches and multipath-tools: dm-devel@redhat.com Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel