svc: failed to register nfsdv3 RPC service (errno 111).
svc: failed to register nfsaclv3 RPC service (errno 111).
==================================================================
BUG: KASAN: slab-use-after-free in list_add include/linux/list.h:169 [inline]
BUG: KASAN: slab-use-after-free in rhashtable_walk_enter+0x333/0x370 lib/rhashtable.c:684
Read of size 8 at addr ffff88809c006010 by task syz.0.9864/12475

CPU: 1 UID: 0 PID: 12475 Comm: syz.0.9864 Not tainted 6.11.0-rc7-syzkaller-00135-gb7718454f937 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 list_add include/linux/list.h:169 [inline]
 rhashtable_walk_enter+0x333/0x370 lib/rhashtable.c:684
 rhltable_walk_enter include/linux/rhashtable.h:1262 [inline]
 __nfsd_file_cache_purge+0xad/0x490 fs/nfsd/filecache.c:805
 nfsd_file_cache_shutdown+0xcf/0x480 fs/nfsd/filecache.c:897
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:329 [inline]
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:323 [inline]
 nfsd_startup_net fs/nfsd/nfssvc.c:444 [inline]
 nfsd_svc+0x6d4/0x970 fs/nfsd/nfssvc.c:817
 nfsd_nl_threads_set_doit+0x52c/0xbc0 fs/nfsd/nfsctl.c:1714
 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2597
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2651
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2680
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fceed37def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fceee0c8038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fceed535f80 RCX: 00007fceed37def9
RDX: 0000000000000004 RSI: 0000000020000280 RDI: 000000000000000c
RBP: 00007fceed3f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fceed535f80 R15: 00007ffe09a29238
 </TASK>

Allocated by task 10940:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4162 [inline]
 __kmalloc_node_noprof+0x211/0x440 mm/slub.c:4168
 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650
 alloc_netdev_mqs+0xc9/0x1290 net/core/dev.c:11050
 rtnl_create_link+0xbed/0xf10 net/core/rtnetlink.c:3374
 rtnl_newlink_create net/core/rtnetlink.c:3500 [inline]
 __rtnl_newlink+0x10b3/0x1920 net/core/rtnetlink.c:3730
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743
 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6647
 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x47f/0x4e0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 3498:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2256 [inline]
 slab_free mm/slub.c:4477 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4598
 kvfree+0x47/0x50 mm/util.c:696
 device_release+0xa1/0x240 drivers/base/core.c:2582
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e4/0x5a0 lib/kobject.c:737
 netdev_run_todo+0x7bc/0x12d0 net/core/dev.c:10769
 default_device_exit_batch+0x736/0x9b0 net/core/dev.c:11898
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:178
 cleanup_net+0x5b7/0xbb0 net/core/net_namespace.c:640
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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 ffff88809c006000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 16 bytes inside of
 freed 4096-byte region [ffff88809c006000, ffff88809c007000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809c006000 pfn:0x9c000
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888030d68241
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000240 ffff88801ac4f500 ffffea0002704010 ffffea0001550c10
raw: ffff88809c006000 0000000000040003 00000001fdffffff ffff888030d68241
head: 00fff00000000240 ffff88801ac4f500 ffffea0002704010 ffffea0001550c10
head: ffff88809c006000 0000000000040003 00000001fdffffff ffff888030d68241
head: 00fff00000000003 ffffea0002700001 ffffffffffffffff 0000000000000000
head: 0000000000000008 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 10962, tgid 10962 (udevd), ts 2824435260650, free_ts 2824020763063
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500
 prep_new_page mm/page_alloc.c:1508 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x4e/0xf0 mm/slub.c:2325
 allocate_slab mm/slub.c:2488 [inline]
 new_slab+0x84/0x260 mm/slub.c:2541
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817
 __slab_alloc_node mm/slub.c:3870 [inline]
 slab_alloc_node mm/slub.c:4029 [inline]
 __do_kmalloc_node mm/slub.c:4161 [inline]
 __kmalloc_node_noprof+0x367/0x440 mm/slub.c:4168
 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650
 seq_buf_alloc fs/seq_file.c:38 [inline]
 seq_read_iter+0x830/0x12c0 fs/seq_file.c:210
 kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x869/0xbd0 fs/read_write.c:476
 ksys_read+0x12f/0x260 fs/read_write.c:619
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5221 tgid 5221 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1101 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619
 __folio_put+0x31c/0x3e0 mm/swap.c:128
 folio_put include/linux/mm.h:1490 [inline]
 put_page include/linux/mm.h:1562 [inline]
 skb_page_unref include/linux/skbuff_ref.h:44 [inline]
 __skb_frag_unref include/linux/skbuff_ref.h:57 [inline]
 skb_release_data+0x5df/0x980 net/core/skbuff.c:1117
 skb_release_all net/core/skbuff.c:1188 [inline]
 __kfree_skb+0x4f/0x70 net/core/skbuff.c:1202
 tcp_wmem_free_skb include/net/tcp.h:306 [inline]
 tcp_rtx_queue_unlink_and_free include/net/tcp.h:2090 [inline]
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3409 [inline]
 tcp_ack+0x1eb7/0x5ba0 net/ipv4/tcp_input.c:4005
 tcp_rcv_established+0x60f/0x21c0 net/ipv4/tcp_input.c:6219
 tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1911
 sk_backlog_rcv include/net/sock.h:1111 [inline]
 __release_sock+0x31b/0x400 net/core/sock.c:3004
 release_sock+0x5a/0x220 net/core/sock.c:3558
 tcp_sendmsg+0x38/0x50 net/ipv4/tcp.c:1355
 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:853
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x4b8/0x5c0 net/socket.c:1160
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6b6/0x1140 fs/read_write.c:590
 ksys_write+0x1f8/0x260 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88809c005f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809c005f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809c006000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88809c006080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809c006100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================