==================================================================
BUG: KASAN: slab-use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline]
BUG: KASAN: slab-use-after-free in __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
BUG: KASAN: slab-use-after-free in rhashtable_lookup include/linux/rhashtable.h:646 [inline]
BUG: KASAN: slab-use-after-free in rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672
Read of size 4 at addr ffff88805fe12008 by task syz-executor.3/10321

CPU: 0 PID: 10321 Comm: syz-executor.3 Not tainted 6.9.0-rc7-syzkaller-02064-g71ed6c266348 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 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+0x77a/0x9b0 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+0x1fe/0x3c0 net/ipv6/ila/ila_xlat.c:190
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
 __netif_receive_skb_one_core net/core/dev.c:5624 [inline]
 __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5738
 process_backlog+0x391/0x7d0 net/core/dev.c:6067
 __napi_poll+0xcb/0x490 net/core/dev.c:6721
 napi_poll net/core/dev.c:6790 [inline]
 net_rx_action+0x7bb/0x10a0 net/core/dev.c:6906
 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 neigh_parms_alloc+0x455/0x570 net/core/neighbour.c:1738
 inetdev_init+0x12f/0x4d0 net/ipv4/devinet.c:281
 inetdev_event+0x338/0x15c0 net/ipv4/devinet.c:1565
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 register_netdevice+0x15b2/0x1a20 net/core/dev.c:10407
 wg_newlink+0x355/0x640 drivers/net/wireguard/device.c:367
 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3730 [inline]
 rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3743
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ef027ebdc
Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b
RSP: 002b:00007fffd01bef70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1ef0ed4620 RCX: 00007f1ef027ebdc
RDX: 000000000000003c RSI: 00007f1ef0ed4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffd01befc4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f1ef0ed4670 R15: 0000000000000000
 </TASK>

Allocated by task 5152:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:3972 [inline]
 __kmalloc_node+0x253/0x4f0 mm/slub.c:3979
 kmalloc_node include/linux/slab.h:648 [inline]
 kvmalloc_node+0x72/0x190 mm/util.c:634
 kvmalloc include/linux/slab.h:766 [inline]
 kvzalloc include/linux/slab.h:774 [inline]
 bucket_table_alloc lib/rhashtable.c:184 [inline]
 rhashtable_rehash_alloc+0x9e/0x290 lib/rhashtable.c:363
 rhashtable_shrink lib/rhashtable.c:407 [inline]
 rht_deferred_worker+0x20c0/0x2440 lib/rhashtable.c:425
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 9001:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2111 [inline]
 slab_free mm/slub.c:4286 [inline]
 kfree+0x153/0x3b0 mm/slub.c:4396
 rhashtable_free_and_destroy+0x7c6/0x920 lib/rhashtable.c:1163
 ila_xlat_exit_net+0x55/0x110 net/ipv6/ila/ila_xlat.c:626
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff88805fe12000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 8 bytes inside of
 freed 4096-byte region [ffff88805fe12000, ffff88805fe13000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fe10
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888015042140 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
head: 00fff00000000840 ffff888015042140 dead000000000100 dead000000000122
head: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
head: 00fff00000000003 ffffea00017f8401 dead000000000122 00000000ffffffff
head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 7618, tgid 1270865033 (syz-executor.4), ts 7620, free_ts 207196234669
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
 prep_new_page mm/page_alloc.c:1541 [inline]
 get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2180
 allocate_slab mm/slub.c:2343 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2396
 ___slab_alloc+0xc73/0x1260 mm/slub.c:3530
 __slab_alloc mm/slub.c:3615 [inline]
 __slab_alloc_node mm/slub.c:3668 [inline]
 slab_alloc_node mm/slub.c:3841 [inline]
 __do_kmalloc_node mm/slub.c:3971 [inline]
 __kmalloc_node+0x2db/0x4f0 mm/slub.c:3979
 kmalloc_node include/linux/slab.h:648 [inline]
 kvmalloc_node+0x72/0x190 mm/util.c:634
 kvmalloc_array_node include/linux/slab.h:785 [inline]
 kvmalloc_array include/linux/slab.h:791 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline]
 ptr_ring_init include/linux/ptr_ring.h:489 [inline]
 skb_array_init include/linux/skb_array.h:182 [inline]
 pfifo_fast_init+0x389/0x6e0 net/sched/sch_generic.c:863
 qdisc_create_dflt+0x136/0x4b0 net/sched/sch_generic.c:1013
 mq_init+0x2c7/0x6c0 net/sched/sch_mq.c:90
 qdisc_create_dflt+0x136/0x4b0 net/sched/sch_generic.c:1013
 attach_default_qdiscs net/sched/sch_generic.c:1195 [inline]
 dev_activate+0x210/0x1240 net/sched/sch_generic.c:1249
 __dev_open+0x352/0x450 net/core/dev.c:1481
 __dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8780
 dev_change_flags+0x8b/0x1a0 net/core/dev.c:8852
page last free pid 5282 tgid 5282 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1141 [inline]
 free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
 discard_slab mm/slub.c:2442 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:2911
 put_cpu_partial+0x17c/0x250 mm/slub.c:2986
 __slab_free+0x2ea/0x3d0 mm/slub.c:4157
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3851 [inline]
 kmem_cache_alloc+0x174/0x350 mm/slub.c:3858
 getname_flags+0xbd/0x4f0 fs/namei.c:139
 vfs_fstatat+0x11c/0x190 fs/stat.c:303
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat fs/stat.c:462 [inline]
 __x64_sys_newfstatat+0x117/0x190 fs/stat.c:462
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88805fe11f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805fe11f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805fe12000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88805fe12080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805fe12100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================