Linux kernel commit 8a9ebe717a133ba7bc90b06047f43cc6b8bcb8b3 attrib->max_unmap_lba_count = (q->limits.max_discard_sectors << 9)
Since max_discard_sectors is 32-bit, there may be integer overflow, making wrong max_unmap_lba_count. For example, LVM Thin provisioning reports that it have 16 GB maximal discard block. Exactly the same bug in DRBD9, I have already reported. -- Segmentation fault
