el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x140 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
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
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 10197 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
Hardware name: linux,dummy-virt (DT)
pstate: 10000005 (nzcV daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : strchr+0x24/0xd4 lib/string.c:329
lr : kvasprintf_const+0xcc/0x1e0 lib/kasprintf.c:45
sp : ffff80008bc57150
x29: ffff80008bc57150 x28: ffff00001033ce00 x27: ffff0000396a0068
x26: ffff0000396a0018 x25: ffff0000396a0060 x24: 00000000ffffffd8
x23: ffff80008bc57420 x22: 0000000000000cc0 x21: ffff80008bc57210
x20: 1ffff0001178ae3e x19: 0000000000000000 x18: 0000000000000000
x17: ffff7fffe451e000 x16: ffff800080000000 x15: ffff00006a8ceeb0
x14: 00000000f1f1f1f1 x13: 00000000f2f2f2f2 x12: dfff800000000000
x11: ffff70001178ae66 x10: ffff80008605bd20 x9 : ffff80008bc57420
x8 : ffff80008bc57420 x7 : 00000000ffffffd8 x6 : ffff80008bc573f0
x5 : 1ffff0001178ae42 x4 : 0000000000000000 x3 : 0000000000000000
x2 : dfff800000000000 x1 : 0000000000000025 x0 : 0000000000000000
Call trace:
 strchr+0x24/0xd4 lib/string.c:328
 kvasprintf_const+0xcc/0x1e0 lib/kasprintf.c:45
 kobject_set_name_vargs+0x5c/0x118 lib/kobject.c:272
 kobject_add_varg lib/kobject.c:366 [inline]
 kobject_add+0xf8/0x1e8 lib/kobject.c:424
 device_add+0x1f0/0x12dc drivers/base/core.c:3560
 nfc_register_device+0x4c/0x2e8 net/nfc/core.c:1118
 nci_register_device+0x60c/0x8c8 net/nfc/nci/core.c:1257
 virtual_ncidev_open+0x110/0x1cc drivers/nfc/virtual_ncidev.c:148
 misc_open+0x2d0/0x3a8 drivers/char/misc.c:165
 chrdev_open+0x1c0/0x518 fs/char_dev.c:414
 do_dentry_open+0x4e8/0x1138 fs/open.c:929
 vfs_open+0x90/0xc8 fs/open.c:1063
 do_open fs/namei.c:3639 [inline]
 path_openat+0x1488/0x2058 fs/namei.c:3796
 do_filp_open+0x16c/0x330 fs/namei.c:3823
 do_sys_openat2+0x12c/0x160 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_openat fs/open.c:1453 [inline]
 __se_sys_openat fs/open.c:1448 [inline]
 __arm64_sys_openat+0x12c/0x1b8 fs/open.c:1448
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:51
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x140 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: f2fbffe2 a90153f3 12000803 aa0003f3 (38e26882) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f2fbffe2 	movk	x2, #0xdfff, lsl #48
   4:	a90153f3 	stp	x19, x20, [sp, #16]
   8:	12000803 	and	w3, w0, #0x7
   c:	aa0003f3 	mov	x19, x0
* 10:	38e26882 	ldrsb	w2, [x4, x2] <-- trapping instruction