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] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6582 Comm: syz.4.20 Not tainted 6.13.0-rc2-syzkaller-g2e7aff49b5da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : _compound_head include/linux/page-flags.h:242 [inline]
pc : put_page include/linux/mm.h:1552 [inline]
pc : skb_page_unref include/linux/skbuff_ref.h:43 [inline]
pc : __skb_frag_unref+0x80/0x214 include/linux/skbuff_ref.h:56
lr : netmem_to_page include/net/netmem.h:83 [inline]
lr : skb_page_unref include/linux/skbuff_ref.h:43 [inline]
lr : __skb_frag_unref+0x78/0x214 include/linux/skbuff_ref.h:56
sp : ffff800080016d20
x29: ffff800080016d20 x28: dfff800000000000 x27: 0000000000000007
x26: ffff0000d1bd6b40 x25: ffff0000d1bd6b70 x24: 0000000000000000
x23: ffff0000d1bd6b42 x22: 1fffe0001a37ad68 x21: dfff800000000000
x20: 0000000000000008 x19: 0000000000000000 x18: ffff0000f4e7430c
x17: 000000000001cdde x16: ffff800080699390 x15: 0000000000000001
x14: 1fffe0001a37ad6c x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001a37ad6d x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff80008977cd4c
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 _compound_head include/linux/page-flags.h:242 [inline] (P)
 put_page include/linux/mm.h:1552 [inline] (P)
 skb_page_unref include/linux/skbuff_ref.h:43 [inline] (P)
 __skb_frag_unref+0x80/0x214 include/linux/skbuff_ref.h:56 (P)
 netmem_to_page include/net/netmem.h:83 [inline] (L)
 skb_page_unref include/linux/skbuff_ref.h:43 [inline] (L)
 __skb_frag_unref+0x78/0x214 include/linux/skbuff_ref.h:56 (L)
 skb_release_data+0x3c4/0x618 net/core/skbuff.c:1119
 skb_release_all net/core/skbuff.c:1190 [inline]
 __kfree_skb+0x58/0x78 net/core/skbuff.c:1204
 tcp_wmem_free_skb include/net/tcp.h:306 [inline]
 tcp_rtx_queue_unlink_and_free+0x2e8/0x4a8 include/net/tcp.h:2091
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline]
 tcp_ack+0x1c84/0x5598 net/ipv4/tcp_input.c:4032
 tcp_rcv_state_process+0x50c/0x3b84 net/ipv4/tcp_input.c:6805
 tcp_v4_do_rcv+0x71c/0xc44 net/ipv4/tcp_ipv4.c:1939
 tcp_v4_rcv+0x2498/0x2dbc net/ipv4/tcp_ipv4.c:2351
 ip_protocol_deliver_rcu+0x1f8/0x484 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x284/0x4f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314
 ip_local_deliver+0x120/0x194 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_rcv_finish+0x220/0x24c net/ipv4/ip_input.c:447
 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314
 ip_rcv+0x7c/0x9c net/ipv4/ip_input.c:567
 __netif_receive_skb_one_core net/core/dev.c:5672 [inline]
 __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5785
 process_backlog+0x640/0x123c net/core/dev.c:6117
 __napi_poll+0xb4/0x3fc net/core/dev.c:6883
 napi_poll net/core/dev.c:6952 [inline]
 net_rx_action+0x6a8/0xf4c net/core/dev.c:7074
 handle_softirqs+0x320/0xd34 kernel/softirq.c:554
 __do_softirq+0x14/0x20 kernel/softirq.c:588
 ____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
 do_softirq+0x90/0xf8 kernel/softirq.c:455
 __local_bh_enable_ip+0x288/0x44c kernel/softirq.c:382
 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33
 put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:244 [inline]
 fpsimd_restore_current_state+0x64/0xec arch/arm64/kernel/fpsimd.c:1811
 do_notify_resume+0x114/0x1f4 arch/arm64/kernel/entry-common.c:154
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 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: 37000653 979e4040 91002274 d343fe88 (38756908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	37000653 	tbnz	w19, #0, 0xc8
   4:	979e4040 	bl	0xfffffffffe790104
   8:	91002274 	add	x20, x19, #0x8
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	38756908 	ldrb	w8, [x8, x21] <-- trapping instruction