__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Unable to handle kernel paging request at virtual address dfff800000000001
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6549 Comm: syz.0.16 Not tainted 6.15.0-rc4-syzkaller-00040-g8bac8898fe39 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : fb_videomode_to_var+0x3c/0x638 drivers/video/fbdev/core/modedb.c:905
lr : fb_videomode_to_var+0x2c/0x638 drivers/video/fbdev/core/modedb.c:904
sp : ffff80009b767460
x29: ffff80009b767470 x28: ffff7000128d216c x27: ffff800094690c60
x26: 0000000000000020 x25: 0000000000000001 x24: ffff80008d3be6c8
x23: ffff80009b767520 x22: ffff0000c00893c0 x21: dfff800000000000
x20: 0000000000000000 x19: ffff80009b767520 x18: 00000000ffffffff
x17: ffff800090308000 x16: ffff800089b8cb88 x15: 0000000000000000
x14: 0000000000000000 x13: ffff7000136eceb8 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000007 x9 : 0000000000000001
x8 : 000000000000000c x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : ffffffffffffffe0 x3 : 0000000000000080
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff80009b767520
Call trace:
 fb_videomode_to_var+0x3c/0x638 drivers/video/fbdev/core/modedb.c:905 (P)
 display_to_var drivers/video/fbdev/core/fbcon.c:923 [inline]
 fbcon_switch+0x650/0x1af4 drivers/video/fbdev/core/fbcon.c:2118
 redraw_screen+0x4c0/0xcac drivers/tty/vt/vt.c:957
 vc_do_resize+0xc48/0x10cc drivers/tty/vt/vt.c:1272
 __vc_resize+0x5c/0x70 drivers/tty/vt/vt.c:1294
 vc_resize include/linux/vt_kern.h:49 [inline]
 fbcon_modechanged+0x63c/0xfdc drivers/video/fbdev/core/fbcon.c:2680
 fbcon_update_vcs+0x3c/0x4c drivers/video/fbdev/core/fbcon.c:2736
 do_fb_ioctl+0x9d0/0xb5c drivers/video/fbdev/core/fb_chrdev.c:92
 fb_ioctl+0xec/0x134 drivers/video/fbdev/core/fb_chrdev.c:169
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 91003288 d343fd09 1200090a 11000d4a (38f56929) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	91003288 	add	x8, x20, #0xc
   4:	d343fd09 	lsr	x9, x8, #3
   8:	1200090a 	and	w10, w8, #0x7
   c:	11000d4a 	add	w10, w10, #0x3
* 10:	38f56929 	ldrsb	w9, [x9, x21] <-- trapping instruction