Exception RIP occurs in `_snapimage_close` function of `veeamsnap` module, causing kernel panic

Issue

• Exception RIP occurs in _snapimage_close function of veeamsnap module, causing kernel panic

crash> mod -t
NAME       TAINTS
veeamsnap  OE

crash> bt
PID: 6405     TASK: ffff8c7bcfedc200  CPU: 47   COMMAND: "fsaccd"
 #0 [ffff8c7bcfc7fa60] machine_kexec at ffffffffa2069854
 #1 [ffff8c7bcfc7fac0] __crash_kexec at ffffffffa2129ef2
 #2 [ffff8c7bcfc7fb90] crash_kexec at ffffffffa2129fe8
 #3 [ffff8c7bcfc7fba8] oops_end at ffffffffa27bc818
 #4 [ffff8c7bcfc7fbd0] no_context at ffffffffa207974c
 #5 [ffff8c7bcfc7fc20] __bad_area_nosemaphore at ffffffffa2079a2a
 #6 [ffff8c7bcfc7fc70] bad_area_nosemaphore at ffffffffa2079b54
 #7 [ffff8c7bcfc7fc80] __do_page_fault at ffffffffa27bf8d0
 #8 [ffff8c7bcfc7fcf0] do_page_fault at ffffffffa27bfb05
 #9 [ffff8c7bcfc7fd20] page_fault at ffffffffa27bb7b8
    [exception RIP: mutex_lock+21]
    RIP: ffffffffa27b6025  RSP: ffff8c7bcfc7fdd8  RFLAGS: 00010246
    RAX: 0000000000000000  RBX: 00000000000000f0  RCX: ffff8c7bcfc7ffd8
    RDX: 0000000000000000  RSI: 0000000000000083  RDI: 00000000000000f0
    RBP: ffff8c7bcfc7fde0   R8: ffff8c7227414000   R9: 0000000180080000
    R10: 0000000027415001  R11: ffff8c7227414000  R12: 00000000000000f0
    R13: ffff8c7bde5a2400  R14: 0000000000000083  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff8c7bcfc7fde8] _snapimage_close at ffffffffc0ca0d2b [veeamsnap]
#11 [ffff8c7bcfc7fe08] __blkdev_put at ffffffffa229f1ef
#12 [ffff8c7bcfc7fe48] blkdev_put at ffffffffa229fb9c
#13 [ffff8c7bcfc7fe70] kill_block_super at ffffffffa225ec04
#14 [ffff8c7bcfc7fe90] deactivate_locked_super at ffffffffa225ef56
#15 [ffff8c7bcfc7feb0] deactivate_super at ffffffffa225f70a
#16 [ffff8c7bcfc7fec8] cleanup_mnt at ffffffffa227fbdf
#17 [ffff8c7bcfc7fee0] __cleanup_mnt at ffffffffa227fc82
#18 [ffff8c7bcfc7fef0] task_work_run at ffffffffa20c7f6b
#19 [ffff8c7bcfc7ff30] do_notify_resume at ffffffffa202dcfd
#20 [ffff8c7bcfc7ff50] int_signal at ffffffffa27c56f7
    RIP: 00007f9f50f937a0  RSP: 00007ffe8ea5f248  RFLAGS: 00000246
    RAX: 0000000000000000  RBX: 0000000000000000  RCX: ffffffffffffffff
    RDX: 00000000012a6d30  RSI: 00007f9f50c7c760  RDI: 000000000000000b
    RBP: 000000000149f310   R8: 0000000000000000   R9: 0000000000000018
    R10: 0000000000000002  R11: 0000000000000246  R12: 0000000000478540
    R13: 000000000000000b  R14: 00000000013d5e80  R15: 000000000000fc02
    ORIG_RAX: 0000000000000003  CS: 0033  SS: 002b