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 = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006, 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: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 2254 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-12053-g744a759492b5 #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 : ffff80008c7672e0
x29: ffff80008c7672e0 x28: ffff00000a82d400 x27: ffff00003833a6b0
x26: ffff00003833a660 x25: ffff00003833a6a8 x24: 00000000ffffffd8
x23: ffff80008c7675b0 x22: 0000000000000cc0 x21: ffff80008c7673a0
x20: 1ffff000118ece70 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 00000000f1f1f1f1 x13: 00000000f2f2f2f2 x12: dfff800000000000
x11: ffff7000118ece98 x10: ffff800086047d20 x9 : ffff80008c7675b0
x8 : ffff80008c7675b0 x7 : 00000000ffffffd8 x6 : ffff80008c767580
x5 : 1ffff000118ece74 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
 netdev_register_kobject+0xe4/0x2c0 net/core/net-sysfs.c:2044
 register_netdevice+0x7ec/0xf24 net/core/dev.c:10136
 vti6_tnl_create2+0x6c/0xb8 net/ipv6/ip6_vti.c:190
 vti6_tnl_create net/ipv6/ip6_vti.c:229 [inline]
 vti6_locate+0x3ac/0x454 net/ipv6/ip6_vti.c:277
 vti6_siocdevprivate+0x59c/0xd18 net/ipv6/ip6_vti.c:841
 dev_siocdevprivate net/core/dev_ioctl.c:489 [inline]
 dev_ifsioc+0x17c/0xb9c net/core/dev_ioctl.c:597
 dev_ioctl+0xbac/0xcd8 net/core/dev_ioctl.c:811
 sock_ioctl+0x480/0x5d4 net/socket.c:1248
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __arm64_sys_ioctl+0x124/0x190 fs/ioctl.c:857
 __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