gpio error

pi@raspberrypi:~$ [  541.033436] Unable to handle kernel NULL pointer dereference at virtual address 00000044
[  541.045765] pgd = dc724000
[  541.052604] [00000044] *pgd=1c703831, *pte=00000000, *ppte=00000000
[  541.063118] Internal error: Oops: 17 [#1] PREEMPT ARM

Entering kdb (current=0xdda3b180, pid 2183) Oops: (null)
due to oops @ 0xc027dd50

dCPU: 0 PID: 2183 Comm: bash Not tainted 3.10.37+ #3
dtask: dda3b180 ti: dc62c000 task.ti: dc62c000
PC is at gpiod_request+0x58/0x234
LR is at export_store+0x3c/0xdc
pc : [<c027dd50>]    lr : [<c027e998>]    psr: 60000093
sp : dc62def8  ip : 00000032  fp : 00ee8258
r10: a0000013  r9 : c0559980  r8 : fffffdfb
r7 : a0000013  r6 : 00000000  r5 : c06e4780  r4 : dc62c000
r3 : 00000001  r2 : 00000000  r1 : c0559980  r0 : c06e4780
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 00c5387d  Table: 1c724008  DAC: 00000015
dCPU: 0 PID: 2183 Comm: bash Not tainted 3.10.37+ #3
[<c0013b24>] (unwind_backtrace+0x0/0xf0) from [<c0010e80>] (show_stack+0x10/0x14)
[<c0010e80>] (show_stack+0x10/0x14) from [<c0077368>] (kdb_dumpregs+0x28/0x50)
[<c0077368>] (kdb_dumpregs+0x28/0x50) from [<c00795d8>] (kdb_main_loop+0x3c0/0x6c0)
[<c00795d8>] (kdb_main_loop+0x3c0/0x6c0) from [<c007bcd8>] (kdb_stub+0x154/0x380)
[<c007bcd8>] (kdb_stub+0x154/0x380) from [<c0072ec8>] (kgdb_handle_exception+0x32c/0x6c0)
[<c0072ec8>] (kgdb_handle_exception+0x32c/0x6c0) from [<c00132a4>] (kgdb_notify+0x24/0x40)
[<c00132a4>] (kgdb_notify+0x24/0x40) from [<c0462048>] (notifier_call_chain+0x44/0x84)
[<c0462048>] (notifier_call_chain+0x44/0x84) from [<c04620c0>] (__atomic_notifier_call_chain+0x38/0x4c)
[<c04620c0>] (__atomic_notifier_call_chain+0x38/0x4c) from [<c04620ec>] (atomic_notifier_call_chain+0x18/0x20)
[<c04620ec>] (atomic_notifier_call_chain+0x18/0x20) from [<c046212c>] (notify_die+0x38/0x44)
[<c046212c>] (notify_die+0x38/0x44) from [<c0010f48>] (die+0xc4/0x3a8)
[<c0010f48>] (die+0xc4/0x3a8) from [<c045989c>] (__do_kernel_fault.part.9+0x54/0x74)
[<c045989c>] (__do_kernel_fault.part.9+0x54/0x74) from [<c0461d74>] (do_page_fault+0x1dc/0x3c4)
[<c0461d74>] (do_page_fault+0x1dc/0x3c4) from [<c000834c>] (do_DataAbort+0x34/0x98)
[<c000834c>] (do_DataAbort+0x34/0x98) from [<c04605b8>] (__dabt_svc+0x38/0x60)
Exception stack(0xdc62deb0 to 0xdc62def8)
dea0:                                     c06e4780 c0559980 00000000 00000001
dec0: dc62c000 c06e4780 00000000 a0000013 fffffdfb c0559980 a0000013 00ee8258
dee0: 00000032 dc62def8 c027e998 c027dd50 60000093 ffffffff
[<c04605b8>] (__dabt_svc+0x38/0x60) from [<c027dd50>] (gpiod_request+0x58/0x234)
[<c027dd50>] (gpiod_request+0x58/0x234) from [<c027e998>] (export_store+0x3c/0xdc)
[<c027e998>] (export_store+0x3c/0xdc) from [<c02ba658>] (class_attr_store+0x18/0x24)
[<c02ba658>] (class_attr_store+0x18/0x24) from [<c01369f4>] (sysfs_write_file+0x168/0x19c)
[<c01369f4>] (sysfs_write_file+0x168/0x19c) from [<c00d75c0>] (vfs_write+0xb0/0x1c4)
[<c00d75c0>] (vfs_write+0xb0/0x1c4) from [<c00d7a70>] (SyS_write+0x3c/0x70)
[<c00d7a70>] (SyS_write+0x3c/0x70) from [<c000dbc0>] (ret_fast_syscall+0x0/0x30)
more>
kdb>