If I run:

$ sudo dmsetup create baddev '--table=0 1024 zero'
$ sudo dmsetup load baddev '--table=0 1024 linear /dev/mapper/baddev 0'
$ sudo dmsetup suspend baddev
$ sudo dmsetup resume baddev

the kernel immediately panics.  Console output indicates infinite
recursion in dm_block_ioctl.  This is Fedora’s Linux 6.0.5 in case it
matters.
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)

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