[Bug 253860] ccp(4) immediately hangs when creating geli device

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253860

            Bug ID: 253860
           Summary: ccp(4) immediately hangs when creating geli device
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: asomers at FreeBSD.org

The ccp(4) driver immediately hangs if I try to use it on a freshly installed
13.3-BETA3 system.  I can load the driver, but it immediately hangs the first
time I try to use it, which is by creating a geli device.

> sudo kldload ccp
> sudo mdconfig -a -t swap -s 64m
md0
> sudo geli onetime -e aes-xts -l 256 -s 4096 /dev/md0
<hangs>

In another terminal, dmesg shows that it ccp is indeed being used:
> dmesg
...
ccp0: <AMD CCP-5a> mem 0xfc000000-0xfc0fffff,0xfc1cc000-0xfc1cdfff irq 54 at
device 0.2 on pci12
random: registering fast source AMD CCP TRNG
GEOM_ELI: Device md0.eli created.
GEOM_ELI: Encryption: AES-XTS 256
GEOM_ELI:     Crypto: hardware


> uname -a
FreeBSD XXX.YYY 13.0-BETA3 FreeBSD 13.0-BETA3 #0
releng/13.0-n244525-150b4388d3b: Fri Feb 19 04:04:34 UTC 2021    
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

> sysctl hw.model
hw.model: AMD Ryzen 3 3200G with Radeon Vega Graphics

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