Segfault on emulated NVME as SSD Cache

I had an idea to emulate an NVME and try to use it as cache in Synology DSM. I get to a point where it tried to mount the cache, then I get a segfault.

[ 1846.792660] kvm[24147]: segfault at 0 ip 000055bb2d97fb32 sp 00007fc7a62a2fb0 error 4 in qemu-system-x86_64[55bb2d857000+613000] likely on CPU 1 (core 1, socket 0)
[ 1846.793173] Code: e1 27 54 00 e8 6f 7b ed ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 53 48 8b 77 30 48 89 fb 44 8b 43 38 48 8b 06 8b 7e 60 <48> 8b 08 45 85 c0 78 46 80 7b 4c 00 74 58 8b 43 48 83 c0 01 3d 00
[ 1846.801440]  zd64: p1 p2 p3