DF-3049 fixed-module re-run (same kernel, ext2fs.ko rebuilt with fix.diff hunk 1):

$ /root/vntool attach 0 /root/df3049.img
attached /root/df3049.img size=0
$ mount -t ext2fs -o ro /dev/vn0 /mnt/e2 ; echo MOUNT-RC=$?
mount_ext2fs: /dev/vn0: Invalid argument     <- rejected at s_desc_size check
MOUNT-RC=71
$ grep "bad gd" console -> (empty)            <- no OOB read, no oracle print