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: 1 UID: 0 PID: 7304 Comm: syz.3.159 Not tainted 6.14.0-rc5-syzkaller-g77c95b8c7a16 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : llc_conn_state_process+0xb00/0x1140
lr : llc_conn_state_process+0xacc/0x1140 net/llc/llc_conn.c:140
sp : ffff800080017b10
x29: ffff800080017b40 x28: 0000000000000000 x27: ffff800092ba8d90
x26: ffff80008e03aaf0 x25: 0000000000000001 x24: 1fffe0001e1b5c02
x23: 0000000000000000 x22: 0000000000000007 x21: ffff0000f0dae012
x20: dfff800000000000 x19: ffff0000fce7c140 x18: ffff0000d0c04240
x17: ffff800123ca8000 x16: ffff8000806a1d08 x15: 0000000000000001
x14: 0000000000000000 x13: 0000000000000005 x12: ffff0000d724bd00
x11: 0000000000ff0100 x10: 0000000000000007 x9 : 0000000000000003
x8 : 0000000000000000 x7 : ffff800089a8c100 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800089a8c1c4
x2 : 0000000000000001 x1 : 0000000000000002 x0 : 0000000000000000
Call trace:
 llc_conn_state_process+0xb00/0x1140 (P)
 llc_process_tmr_ev net/llc/llc_c_ac.c:1445 [inline]
 llc_conn_tmr_common_cb+0x2d0/0x780 net/llc/llc_c_ac.c:1331
 llc_conn_ack_tmr_cb+0x24/0x34 net/llc/llc_c_ac.c:1354
 call_timer_fn+0x1b4/0x8b8 kernel/time/timer.c:1789
 expire_timers kernel/time/timer.c:1840 [inline]
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x56c/0x7b4 kernel/time/timer.c:2426
 run_timer_base kernel/time/timer.c:2435 [inline]
 run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2445
 handle_softirqs+0x320/0xd34 kernel/softirq.c:561
 __do_softirq+0x14/0x20 kernel/softirq.c:595
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86
 invoke_softirq kernel/softirq.c:442 [inline]
 __irq_exit_rcu+0x1d8/0x544 kernel/softirq.c:662
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:678
 __el1_irq arch/arm64/kernel/entry-common.c:561 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:575
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P)
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P)
 consume_stock mm/memcontrol.c:1795 [inline] (P)
 try_charge_memcg+0x2bc/0xd6c mm/memcontrol.c:2216 (P)
 try_charge mm/memcontrol-v1.h:19 [inline]
 charge_memcg+0xa0/0x148 mm/memcontrol.c:4488
 __mem_cgroup_charge+0x38/0xa8 mm/memcontrol.c:4505
 mem_cgroup_charge include/linux/memcontrol.h:644 [inline]
 shmem_alloc_and_add_folio+0x9cc/0x1564 mm/shmem.c:1912
 shmem_get_folio_gfp+0x554/0x1790 mm/shmem.c:2522
 shmem_get_folio mm/shmem.c:2628 [inline]
 shmem_write_begin+0x140/0x488 mm/shmem.c:3278
 generic_perform_write+0x29c/0x868 mm/filemap.c:4189
 shmem_file_write_iter+0x110/0x138 mm/shmem.c:3454
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x704/0xa9c fs/read_write.c:679
 ksys_write+0x15c/0x26c fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:739
 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 528000ea 1a9f0539 1a9f1556 d343fee8 (38f46908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	528000ea 	mov	w10, #0x7                   	// #7
   4:	1a9f0539 	csinc	w25, w9, wzr, eq	// eq = none
   8:	1a9f1556 	csinc	w22, w10, wzr, ne	// ne = any
   c:	d343fee8 	lsr	x8, x23, #3
* 10:	38f46908 	ldrsb	w8, [x8, x20] <-- trapping instruction