Failed to unlaod this modules used by -1 on IMX8QXP 4.14.78-toradex

[srpatcha]

Failed to unlaod this modules on IMX8QXP.
4.14.78-toradex_imx_4.14.78_1.0.0_ga-bring_up-gaf64dc9-dirty
Logs :
[ 2398.652989] Unable to handle kernel NULL pointer dereference at virtual address 00000070
[ 2398.661132] Mem abort info:
[ 2398.663968] Exception class = DABT (current EL), IL = 32 bi ts
[ 2398.669909] SET = 0, FnV = 0
[ 2398.672985] EA = 0, S1PTW = 0
[ 2398.676186] Data abort info:
[ 2398.679085] ISV = 0, ISS = 0x00000006
[ 2398.682950] CM = 0, WnR = 0
[ 2398.685921] user pgtable: 4k pages, 48-bit VAs, pgd = ffff800 079d67000
[ 2398.692471] [0000000000000070] *pgd=00000000f634e003, *pud=00 000000f9d15003, *pmd=0000000000000000
[ 2398.701466] Internal error: Oops: 96000006 [#1] PREEMPT SMP
[ 2398.707037] Modules linked in: rpmsg_multiept(-) crc3 2_ce crct10dif_ce isofs [last unloaded: imx_rpmsg_tty]
[ 2398.717492] CPU: 1 PID: 13208 Comm: rmmod Not tainted 4.14.78 -toradex_imx_4.14.78_1.0.0_ga-bring_up-gaf64dc9-dirty #1
[ 2398.728104] Hardware name: Conti Colibri iMX8QXP (DT)
[ 2398.733161] task: ffff800078ab5e80 task.stack: ffff0000131880 00
[ 2398.739096] PC is at sysfs_delete_link+0x38/0x70
[ 2398.743715] LR is at sysfs_delete_link+0x28/0x70
[ 2398.748338] pc : [] lr : [] pstate: 60000145
[ 2398.755737] sp : ffff00001318bc50
[ 2398.759047] x29: ffff00001318bc50 x28: ffff800078ab5e80
[ 2398.764363] x27: ffff000008a61000 x26: 000000000000006a
[ 2398.769680] x25: 0000000000000124 x24: ffff80007995c010
[ 2398.774997] x23: ffff000009010000 x22: ffff800079eb8280
[ 2398.780313] x21: 0000000000000000 x20: ffff8000797d5a18
[ 2398.785630] x19: ffff000008ffd000 x18: 000000000000002f
[ 2398.790947] x17: 000000000042d2c8 x16: ffff00000812c4d0
[ 2398.796264] x15: 0000000000000000 x14: ffff80007b175628
[ 2398.801582] x13: ffff80001071ce90 x12: ffff80007b175488
[ 2398.806897] x11: ffff80007b1754b0 x10: 0000000000000000
[ 2398.812214] x9 : 0000000000000030 x8 : 00000000400c0000
[ 2398.817530] x7 : 0000000000210d00 x6 : 000000000000002f
[ 2398.822849] x5 : ffff000008276f80 x4 : 0000000000000000
[ 2398.828164] x3 : 0000000000000000 x2 : 0000000000000000
[ 2398.833481] x1 : 0000000000000000 x0 : ffff8000797f8e58
[ 2398.838800] Process rmmod (pid: 13208, stack limit = 0xffff00 0013188000)
[ 2398.845506] Call trace:
[ 2398.847950] Exception stack(0xffff00001318bb10 to 0xffff00001 318bc50)
[ 2398.854397] bb00: ffff80007 97f8e58 0000000000000000
[ 2398.862233] bb20: 0000000000000000 0000000000000000 000000000 0000000 ffff000008276f80
[ 2398.870067] bb40: 000000000000002f 0000000000210d00 000000004 00c0000 0000000000000030
[ 2398.877903] bb60: 0000000000000000 ffff80007b1754b0 ffff80007 b175488 ffff80001071ce90
[ 2398.885739] bb80: ffff80007b175628 0000000000000000 ffff00000 812c4d0 000000000042d2c8
[ 2398.893576] bba0: 000000000000002f ffff000008ffd000 ffff80007 97d5a18 0000000000000000
[ 2398.901414] bbc0: ffff800079eb8280 ffff000009010000 ffff80007 995c010 0000000000000124
[ 2398.909248] bbe0: 000000000000006a ffff000008a61000 ffff80007 8ab5e80 ffff00001318bc50
[ 2398.917086] bc00: ffff00000827b158 ffff00001318bc50 ffff00000 827b168 0000000060000145
[ 2398.924920] bc20: ffff00001318bc30 ffff00000827877c 0000fffff fffffff ffff00000827aeb8
[ 2398.932755] bc40: ffff00001318bc50 ffff00000827b168
[ 2398.937641] [] sysfs_delete_link+0x38/0x70
[ 2398.943307] [] device_remove_class_symlinks +0x90/0xb0
[ 2398.949925] [] device_del+0x124/0x310
[ 2398.955153] [] device_unregister+0x14/0x30
[ 2398.960836] [] channel_device_free+0x80/0x1 d8 [rpmsg_multiept]
[ 2398.968947] [] channel_device_free+0x180/0x 1d8 [rpmsg_multiept]
[ 2398.977137] [] rpmsg_dev_remove+0x38/0x70
[ 2398.982713] [] device_release_driver_intern al+0x174/0x210
[ 2398.989678] [] driver_detach+0x44/0x80
[ 2398.994995] [] bus_remove_driver+0x54/0xc0
[ 2399.000659] [] driver_unregister+0x2c/0x50
[ 2399.006325] [] unregister_rpmsg_driver+0xc/ 0x20
[ 2399.012439] [] cleanup_module+0x48/0xf48 [ rpmsg_multiept]
[ 2399.020106] [] SyS_delete_module+0x1b8/0x22 0
[ 2399.025936] Exception stack(0xffff00001318bec0 to 0xffff00001 318c000)
[ 2399.032387] bec0: 000000003a5b17b8 0000000000000800 000000000 000000a 0000ffffcaf43491
[ 2399.040221] bee0: 0000ffffac811390 1999999999999999 000000000 0000000 0000ffffac7d1670
[ 2399.048058] bf00: 000000000000006a 0000000000000005 000000000 0000000 0000000000000028
[ 2399.055895] bf20: 746c756d5f67736d 0000ffffac6d02c8 0000ffffa c6c2de0 0000000000000000
[ 2399.063729] bf40: 0000ffffac78f740 000000000042d2c8 000000000 0004010 000000003a5b1750
[ 2399.071567] bf60: 0000ffffcaf44d5b 0000ffffcaf44748 0000ffffc af44740 000000003a5b0260
[ 2399.079403] bf80: 0000000000417de0 0000000000000000 000000000 0417000 0000000000000000
[ 2399.087237] bfa0: 0000000000000000 0000ffffcaf444d0 000000000 0411e88 0000ffffcaf444d0
[ 2399.095073] bfc0: 0000ffffac78f748 0000000080000000 000000003 a5b17b8 000000000000006a
[ 2399.102909] bfe0: 0000000000000000 0000000000000000 000000000 0000000 0000000000000000
[ 2399.110749] [] __sys_trace_return+0x0/0x4
[ 2399.116328] Code: f9401aa0 d2800015 b40000a0 f9401a81 (7940e0 21)
[ 2399.122425] ---[ end trace 9ec6eb1f4dfe8be9 ]---
[ 2399.127110] note: rmmod[13208] exited with preempt_count 1
Segmentation fault

in lsmod used by shows -1
Module Size Used by
rpmsg_multiept 36864 -1