==================================================================
BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline]
BUG: KASAN: use-after-free in __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
BUG: KASAN: use-after-free in rhashtable_lookup include/linux/rhashtable.h:646 [inline]
BUG: KASAN: use-after-free in rhashtable_lookup_fast+0x668/0x814 include/linux/rhashtable.h:672
Read of size 4 at addr ffff0000d2fb8008 by task kworker/0:5/6314

CPU: 0 PID: 6314 Comm: kworker/0:5 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events linkwatch_event
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380
 rht_key_hashfn include/linux/rhashtable.h:159 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
 rhashtable_lookup include/linux/rhashtable.h:646 [inline]
 rhashtable_lookup_fast+0x668/0x814 include/linux/rhashtable.h:672
 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline]
 ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline]
 ila_nf_input+0x210/0x404 net/ipv6/ila/ila_xlat.c:190
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x230 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x22c/0x3d4 include/linux/netfilter.h:312
 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310
 __netif_receive_skb_one_core net/core/dev.c:5544 [inline]
 __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5658
 process_backlog+0x3dc/0x754 net/core/dev.c:5987
 __napi_poll+0xb4/0x3fc net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x608/0xe2c net/core/dev.c:6822
 handle_softirqs+0x2ec/0xc34 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:889
 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
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210
 dev_reset_queue+0x184/0x1fc
 netdev_for_each_tx_queue include/linux/netdevice.h:2500 [inline]
 dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1365
 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1388
 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:175
 __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:234
 linkwatch_event+0x58/0x68 net/core/link_watch.c:277
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112fb8
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000000 fffffdffc3448c08 ffff0001b3e04b70 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d2fb7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000d2fb7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000d2fb8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                      ^
 ffff0000d2fb8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000d2fb8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in lib/rhashtable.c:1182:34
shift exponent 4294901760 is too large for 32-bit type 'int'
CPU: 0 PID: 6314 Comm: kworker/0:5 Tainted: G    B              6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events linkwatch_event
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 dump_stack+0x1c/0x28 lib/dump_stack.c:123
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:468
 __rht_bucket_nested+0x508/0x5b4 lib/rhashtable.c:1182
 rht_bucket_nested+0x48/0x6c lib/rhashtable.c:1214
 rht_bucket include/linux/rhashtable.h:289 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:605 [inline]
 rhashtable_lookup include/linux/rhashtable.h:646 [inline]
 rhashtable_lookup_fast+0x5fc/0x814 include/linux/rhashtable.h:672
 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline]
 ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline]
 ila_nf_input+0x210/0x404 net/ipv6/ila/ila_xlat.c:190
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x230 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x22c/0x3d4 include/linux/netfilter.h:312
 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310
 __netif_receive_skb_one_core net/core/dev.c:5544 [inline]
 __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5658
 process_backlog+0x3dc/0x754 net/core/dev.c:5987
 __napi_poll+0xb4/0x3fc net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x608/0xe2c net/core/dev.c:6822
 handle_softirqs+0x2ec/0xc34 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:889
 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
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210
 dev_reset_queue+0x184/0x1fc
 netdev_for_each_tx_queue include/linux/netdevice.h:2500 [inline]
 dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1365
 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1388
 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:175
 __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:234
 linkwatch_event+0x58/0x68 net/core/link_watch.c:277
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
vkms_vblank_simulate: vblank timer overrun
---[ end trace ]---
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in lib/rhashtable.c:1183:32
shift exponent 4294901760 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 6314 Comm: kworker/0:5 Tainted: G    B              6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events linkwatch_event
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 dump_stack+0x1c/0x28 lib/dump_stack.c:123
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:468
 __rht_bucket_nested+0x5b0/0x5b4 lib/rhashtable.c:1183
 rht_bucket_nested+0x48/0x6c lib/rhashtable.c:1214
 rht_bucket include/linux/rhashtable.h:289 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:605 [inline]
 rhashtable_lookup include/linux/rhashtable.h:646 [inline]
 rhashtable_lookup_fast+0x5fc/0x814 include/linux/rhashtable.h:672
 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline]
 ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline]
 ila_nf_input+0x210/0x404 net/ipv6/ila/ila_xlat.c:190
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x230 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x22c/0x3d4 include/linux/netfilter.h:312
 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310
 __netif_receive_skb_one_core net/core/dev.c:5544 [inline]
 __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5658
 process_backlog+0x3dc/0x754 net/core/dev.c:5987
 __napi_poll+0xb4/0x3fc net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x608/0xe2c net/core/dev.c:6822
 handle_softirqs+0x2ec/0xc34 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:889
 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
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210
 dev_reset_queue+0x184/0x1fc
 netdev_for_each_tx_queue include/linux/netdevice.h:2500 [inline]
 dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1365
 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1388
 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:175
 __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:234
 linkwatch_event+0x58/0x68 net/core/link_watch.c:277
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
vkms_vblank_simulate: vblank timer overrun
---[ end trace ]---
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: 6314 Comm: kworker/0:5 Tainted: G    B              6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events linkwatch_event
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __rht_bucket_nested+0xbc/0x5b4 lib/rhashtable.c:1188
lr : nested_table_top lib/rhashtable.c:72 [inline]
lr : __rht_bucket_nested+0xb0/0x5b4 lib/rhashtable.c:1187
sp : ffff800080007640
x29: ffff800080007650 x28: 1fffe0001d7b8684 x27: ffff0000d2fb8004
x26: dfff800000000000 x25: 00000000ffff0000 x24: 0000000000000000
x23: ffff0000d2fb8000 x22: 00000000c112a019 x21: 00000000cd1aa140
x20: 00000000ffff0000 x19: 0000000000000000 x18: 0000000000000008
x17: 0000000000000000 x16: ffff80008ae89e3c x15: ffff70001243aff0
x14: 1ffff0001243aff0 x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff70001243aff0 x10: 0000000000ff0100 x9 : ffff800093742cc0
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800080006d38 x4 : ffff80008ef95100 x3 : ffff800082f2fbe8
x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000
Call trace:
 __rht_bucket_nested+0xbc/0x5b4 lib/rhashtable.c:1188
 rht_bucket_nested+0x48/0x6c lib/rhashtable.c:1214
 rht_bucket include/linux/rhashtable.h:289 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:605 [inline]
 rhashtable_lookup include/linux/rhashtable.h:646 [inline]
 rhashtable_lookup_fast+0x5fc/0x814 include/linux/rhashtable.h:672
 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline]
 ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline]
 ila_nf_input+0x210/0x404 net/ipv6/ila/ila_xlat.c:190
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc8/0x230 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x22c/0x3d4 include/linux/netfilter.h:312
 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310
 __netif_receive_skb_one_core net/core/dev.c:5544 [inline]
 __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5658
 process_backlog+0x3dc/0x754 net/core/dev.c:5987
 __napi_poll+0xb4/0x3fc net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x608/0xe2c net/core/dev.c:6822
 handle_softirqs+0x2ec/0xc34 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:889
 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
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210
 dev_reset_queue+0x184/0x1fc
 netdev_for_each_tx_queue include/linux/netdevice.h:2500 [inline]
 dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1365
 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1388
 linkwatch_do_dev+0x100/0x1a8 net/core/link_watch.c:175
 __linkwatch_run_queue+0x3a0/0x700 net/core/link_watch.c:234
 linkwatch_event+0x58/0x68 net/core/link_watch.c:277
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Code: 976c7fd3 f9400308 8b130d18 d343ff08 (387a6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	976c7fd3 	bl	0xfffffffffdb1ff4c
   4:	f9400308 	ldr	x8, [x24]
   8:	8b130d18 	add	x24, x8, x19, lsl #3
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction