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Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 86c800c0
[00000000] *pgd=86c84003, *pmd=fe58a003
Internal error: Oops: 80000207 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 PID: 3796 Comm: syz-executor.0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at 0x0
LR is at fbcon_cursor+0x134/0x138 drivers/video/fbdev/core/fbcon.c:1336
pc : [<00000000>]    lr : [<808e9080>]    psr: 20000013
sp : 8676fc30  ip : 00000000  fp : 8676fc5c
r10: 00000000  r9 : 00000000  r8 : 00000720
r7 : 00000007  r6 : 00000002  r5 : 8553f000  r4 : 83420800
r3 : 00000007  r2 : 00000002  r1 : 8553f000  r0 : 83420800
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 86c800c0  DAC: 00000000
Process syz-executor.0 (pid: 3796, stack limit = 0x8676e210)
Stack: (0x8676fc30 to 0x86770000)
fc20:                                     00000000 8676fc40 83420800 82b5fd50
fc40: 86cc12c0 8676fcfc 000000a0 00000100 8676fc74 8676fc60 8095b608 808e8f58
fc60: 83420800 00000000 8676fcac 8676fc78 8095bdb0 8095b5dc 8095ad20 56b92eae
fc80: 83420800 56b92eae 8676fcac 83420800 00000000 86cc12c0 8676fcfc 000000a0
fca0: 8676fd34 8676fcb0 8095d078 8095bbc0 00000000 00000000 00000000 00000280
fcc0: 000001e0 0000001e 00000000 84439e00 86cc12c0 000000a0 00000000 00000000
fce0: 86cc0000 000000a0 83420800 83420a74 000012c0 00000000 833a7cc4 8553f0e0
fd00: 833a7cb8 56b92eae 8553f000 00000280 83420800 0000001e 833a7c6c 00000000
fd20: 833a7c6c 00000074 8676fd44 8676fd38 8095d0d0 8095cb18 8676fd7c 8676fd48
fd40: 808e920c 8095d0bc 83420800 86be6600 00000000 00000001 833a7b34 00000001
fd60: 86be6600 82b5a808 833aa120 82a23374 8676fdd4 8676fd80 808ebf00 808e9090
fd80: 8676fdac 808ed47c 00000001 844aa800 00000001 83420800 00000000 833aa144
fda0: 00000000 8553f000 802d1e78 82a23374 8553f000 20000000 20000000 8358c3c0
fdc0: 00000003 854dc960 8676fdfc 8676fdd8 808ed48c 808ebd30 00000000 00000001
fde0: 00000001 56b92eae 8181dacc 00004610 8676fefc 8676fe00 808e19c8 808ed3d8
fe00: 00000000 00000000 81f94a4c 00000103 82bfd371 8358c3c0 00000003 00000036
fe20: 8676fe54 8676fe30 8027ea14 8181c88c 00000000 00000000 81f94a4c 00000103
fe40: 00000000 00000001 8676fe84 8676fe58 8027eaa8 8027e794 00000000 00000000
fe60: 00000000 00000000 00000000 56b92eae 8549c050 00000010 854dc960 00000046
fe80: 00000001 8358c3c0 00000003 00000036 8676feec 8676fea0 80701b40 806f7810
fea0: 00000001 00000046 00000010 8676febc 834a2e50 83e796c0 20004610 8358c30b
fec0: 8676feb0 8358c3c0 00000003 56b92eae 821280c8 56b92eae 8358c3c0 00004610
fee0: 00000000 8358c3c1 20000000 8358c3c0 8676ff0c 8676ff00 808e1c14 808e16b4
ff00: 8676ffa4 8676ff10 804f33f4 808e1bdc 8020d140 8020e34c 00000000 80200e90
ff20: 828a2438 80200e90 86cbd140 80200060 8676ff4c 8676ff40 8181dacc 8181d97c
ff40: 8676ff74 8676ff50 8181cb8c 8181dabc 8676ff98 80384d84 828abd1c 80200e90
ff60: 60000093 30c5387d 8676ff94 8676ff78 828abd1c 56b92eae 00000000 00000000
ff80: 00000000 00000000 00000036 80200224 8676e000 00000036 00000000 8676ffa8
ffa0: 80200060 804f32e0 00000000 00000000 00000003 00004610 20000000 00000000
ffc0: 00000000 00000000 00000000 00000036 7ed27332 76ffc6d0 7ed274ac 76ffc20c
ffe0: 76ffc048 76ffc038 00018c00 0004b490 60000010 00000003 00000000 00000000
Backtrace: 
[<808e8f4c>] (fbcon_cursor) from [<8095b608>] (hide_cursor+0x38/0xa0 drivers/tty/vt/vt.c:907)
 r9:00000100 r8:000000a0 r7:8676fcfc r6:86cc12c0 r5:82b5fd50 r4:83420800
[<8095b5d0>] (hide_cursor) from [<8095bdb0>] (redraw_screen+0x1fc/0x248 drivers/tty/vt/vt.c:1012)
 r5:00000000 r4:83420800
[<8095bbb4>] (redraw_screen) from [<8095d078>] (vc_do_resize+0x56c/0x5a4 drivers/tty/vt/vt.c:1325)
 r8:000000a0 r7:8676fcfc r6:86cc12c0 r5:00000000 r4:83420800
[<8095cb0c>] (vc_do_resize) from [<8095d0d0>] (vc_resize+0x20/0x24 drivers/tty/vt/vt.c:1345)
 r10:00000074 r9:833a7c6c r8:00000000 r7:833a7c6c r6:0000001e r5:83420800
 r4:00000280
[<8095d0b0>] (vc_resize) from [<808e920c>] (fbcon_set_disp+0x188/0x26c drivers/video/fbdev/core/fbcon.c:1402)
[<808e9084>] (fbcon_set_disp) from [<808ebf00>] (con2fb_init_display drivers/video/fbdev/core/fbcon.c:808 [inline])
[<808e9084>] (fbcon_set_disp) from [<808ebf00>] (set_con2fb_map+0x1dc/0x3e8 drivers/video/fbdev/core/fbcon.c:879)
 r10:82a23374 r9:833aa120 r8:82b5a808 r7:86be6600 r6:00000001 r5:833a7b34
 r4:00000001
[<808ebd24>] (set_con2fb_map) from [<808ed48c>] (fbcon_set_con2fb_map_ioctl+0xc0/0x124 drivers/video/fbdev/core/fbcon.c:3010)
 r10:854dc960 r9:00000003 r8:8358c3c0 r7:20000000 r6:20000000 r5:8553f000
 r4:82a23374
[<808ed3cc>] (fbcon_set_con2fb_map_ioctl) from [<808e19c8>] (do_fb_ioctl+0x320/0x528 drivers/video/fbdev/core/fbmem.c:1156)
 r4:00004610
[<808e16a8>] (do_fb_ioctl) from [<808e1c14>] (fb_ioctl+0x44/0x50 drivers/video/fbdev/core/fbmem.c:1185)
 r8:8358c3c0 r7:20000000 r6:8358c3c1 r5:00000000 r4:00004610
[<808e1bd0>] (fb_ioctl) from [<804f33f4>] (vfs_ioctl fs/ioctl.c:48 [inline])
[<808e1bd0>] (fb_ioctl) from [<804f33f4>] (do_vfs_ioctl fs/ioctl.c:725 [inline])
[<808e1bd0>] (fb_ioctl) from [<804f33f4>] (__do_sys_ioctl fs/ioctl.c:751 [inline])
[<808e1bd0>] (fb_ioctl) from [<804f33f4>] (sys_ioctl+0x120/0xaa4 fs/ioctl.c:739)
[<804f32d4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64)
Exception stack(0x8676ffa8 to 0x8676fff0)
ffa0:                   00000000 00000000 00000003 00004610 20000000 00000000
ffc0: 00000000 00000000 00000000 00000036 7ed27332 76ffc6d0 7ed274ac 76ffc20c
ffe0: 76ffc048 76ffc038 00018c00 0004b490
 r10:00000036 r9:8676e000 r8:80200224 r7:00000036 r6:00000000 r5:00000000
 r4:00000000
Code: bad PC value
---[ end trace 5ba4692f2556f800 ]---