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Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 86bf3b40
[00000000] *pgd=86bf4003, *pmd=fe73e003
Internal error: Oops: 80000207 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 PID: 4353 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 : 86c21c30  ip : 00000000  fp : 86c21c5c
r10: 00000000  r9 : 00000000  r8 : 00000720
r7 : 00000007  r6 : 00000002  r5 : 85486000  r4 : 83420800
r3 : 00000007  r2 : 00000002  r1 : 85486000  r0 : 83420800
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 86bf3b40  DAC: 00000000
Process syz-executor.0 (pid: 4353, stack limit = 0x86c20210)
Stack: (0x86c21c30 to 0x86c22000)
1c20:                                     00000000 86c21c40 83420800 82b5fd50
1c40: 866f32c0 86c21cfc 000000a0 00000100 86c21c74 86c21c60 8095b608 808e8f58
1c60: 83420800 00000000 86c21cac 86c21c78 8095bdb0 8095b5dc 8095ad20 56b92eae
1c80: 83420800 56b92eae 86c21cac 83420800 00000000 866f32c0 86c21cfc 000000a0
1ca0: 86c21d34 86c21cb0 8095d078 8095bbc0 00000000 00000000 00000000 00000280
1cc0: 000001e0 0000001e 00000000 84491e00 866f32c0 000000a0 00000000 00000000
1ce0: 866f2000 000000a0 83420800 83420a74 000012c0 00000000 833a7cc4 854860e0
1d00: 833a7cb8 56b92eae 85486000 00000280 83420800 0000001e 833a7c6c 00000000
1d20: 833a7c6c 00000074 86c21d44 86c21d38 8095d0d0 8095cb18 86c21d7c 86c21d48
1d40: 808e920c 8095d0bc 83420800 86b51c00 00000000 00000001 833a7b34 00000001
1d60: 86b51c00 82b5a808 833aa120 82a23374 86c21dd4 86c21d80 808ebf00 808e9090
1d80: 86c21dac 808ed47c 00000001 84436c00 00000001 83420800 00000000 833aa144
1da0: 00000000 85486000 802d1e78 82a23374 84436c00 20000000 20000000 86bfda00
1dc0: 00000003 844aaa08 86c21dfc 86c21dd8 808ed48c 808ebd30 00000000 00000001
1de0: 00000001 56b92eae 8181dacc 00004610 86c21efc 86c21e00 808e19c8 808ed3d8
1e00: 00000000 00000000 81f94a4c 00000103 82bfd371 86bfda00 00000003 00000036
1e20: 86c21e54 86c21e30 8027ea14 8181c88c 00000000 00000000 81f94a4c 00000103
1e40: 00000000 00000001 86c21e84 86c21e58 8027eaa8 8027e794 00000000 00000000
1e60: 00000000 00000000 00000000 56b92eae 843e9d40 00000010 844aaa08 00000046
1e80: 00000001 86bfda00 00000003 00000036 86c21eec 86c21ea0 80701b40 806f7810
1ea0: 00000001 00000046 00000010 86c21ebc 85676490 8381c180 20004610 86bfda0b
1ec0: 86c21eb0 86bfda00 00000003 56b92eae 821280c8 56b92eae 86bfda00 00004610
1ee0: 00000000 86bfda01 20000000 86bfda00 86c21f0c 86c21f00 808e1c14 808e16b4
1f00: 86c21fa4 86c21f10 804f33f4 808e1bdc 8020d140 8020e34c 00000000 80200e90
1f20: 828a2438 80200e90 86c29040 80200060 86c21f4c 86c21f40 8181dacc 8181d97c
1f40: 86c21f74 86c21f50 8181cb8c 8181dabc 86c21f98 80384d84 828abd1c 80200e90
1f60: 60000093 30c5387d 86c21f94 86c21f78 828abd1c 56b92eae 00000000 00000000
1f80: 00000000 ffffffff 00000036 80200224 86c20000 00000036 00000000 86c21fa8
1fa0: 80200060 804f32e0 00000000 00000000 00000003 00004610 20000000 00000000
1fc0: 00000000 00000000 ffffffff 00000036 7e8a0332 76fee6d0 7e8a04ac 76fee20c
1fe0: 76fee048 76fee038 00018d58 0004b5e0 60000010 00000003 00000000 00000000
Backtrace: 
[<808e8f4c>] (fbcon_cursor) from [<8095b608>] (hide_cursor+0x38/0xa0 drivers/tty/vt/vt.c:907)
 r9:00000100 r8:000000a0 r7:86c21cfc r6:866f32c0 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 r7:86c21cfc r6:866f32c0 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 r7:86b51c00 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)
 r10:844aaa08 r9:00000003 r8:86bfda00 r7:20000000 r6:20000000 r5:84436c00
 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)
 r8:86bfda00 r7:20000000 r6:86bfda01 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(0x86c21fa8 to 0x86c21ff0)
1fa0:                   00000000 00000000 00000003 00004610 20000000 00000000
1fc0: 00000000 00000000 ffffffff 00000036 7e8a0332 76fee6d0 7e8a04ac 76fee20c
1fe0: 76fee048 76fee038 00018d58 0004b5e0
 r10:00000036 r9:86c20000 r8:80200224 r7:00000036 r6:ffffffff r5:00000000
 r4:00000000
Code: bad PC value
---[ end trace fe6d8d63bd1e1527 ]---