svc: failed to register nfsdv3 RPC service (errno 111).
svc: failed to register nfsaclv3 RPC service (errno 512).
==================================================================
BUG: KASAN: slab-use-after-free in shrinker_free+0x3b7/0x430 mm/shrinker.c:775
Read of size 4 at addr ffff88814b0d871c by task syz.0.347/8212

CPU: 1 UID: 0 PID: 8212 Comm: syz.0.347 Not tainted 6.11.0-syzkaller-11624-ge477dba5442c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 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
 shrinker_free+0x3b7/0x430 mm/shrinker.c:775
 nfsd_file_cache_shutdown+0xbc/0x4e0 fs/nfsd/filecache.c:923
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:314 [inline]
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:308 [inline]
 nfsd_startup_net fs/nfsd/nfssvc.c:429 [inline]
 nfsd_svc+0x6a9/0x940 fs/nfsd/nfssvc.c:820
 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722
 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:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685
 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: 0033:0x7f4db8f7dff9
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:00007f4db89ff038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4db9136058 RCX: 00007f4db8f7dff9
RDX: 0000000000008004 RSI: 0000000020000140 RDI: 0000000000000005
RBP: 00007f4db8ff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4db9136058 R15: 00007ffd0839ade8
 </TASK>

Allocated by task 8206:
 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:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kmalloc_noprof include/linux/slab.h:878 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 shrinker_alloc+0xf8/0xb00 mm/shrinker.c:683
 nfsd_file_cache_init+0x1cb/0x4d0 fs/nfsd/filecache.c:775
 nfsd_startup_generic fs/nfsd/nfssvc.c:292 [inline]
 nfsd_startup_net fs/nfsd/nfssvc.c:387 [inline]
 nfsd_svc+0x5db/0x940 fs/nfsd/nfssvc.c:820
 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722
 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:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685
 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 0:
 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 mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2343 [inline]
 slab_free mm/slub.c:4580 [inline]
 kfree+0x14f/0x4b0 mm/slub.c:4728
 rcu_do_batch kernel/rcu/tree.c:2567 [inline]
 rcu_core+0x79d/0x14d0 kernel/rcu/tree.c:2823
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1037
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702

Last potentially related work creation:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
 __call_rcu_common.constprop.0+0x99/0x7a0 kernel/rcu/tree.c:3086
 shrinker_free+0xfe/0x430 mm/shrinker.c:807
 nfsd_file_cache_shutdown+0xbc/0x4e0 fs/nfsd/filecache.c:923
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:314 [inline]
 nfsd_shutdown_generic fs/nfsd/nfssvc.c:308 [inline]
 nfsd_startup_net fs/nfsd/nfssvc.c:429 [inline]
 nfsd_svc+0x6a9/0x940 fs/nfsd/nfssvc.c:820
 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722
 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:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685
 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

The buggy address belongs to the object at ffff88814b0d8700
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 28 bytes inside of
 freed 192-byte region [ffff88814b0d8700, ffff88814b0d87c0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88814b0d8e00 pfn:0x14b0d8
flags: 0x57ff00000000200(workingset|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000200 ffff88801ac413c0 ffffea000514c650 ffffea000514c350
raw: ffff88814b0d8e00 000000000010000c 00000001f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 12267670163, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x223/0x25c0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2413 [inline]
 allocate_slab mm/slub.c:2579 [inline]
 new_slab+0x28b/0x3f0 mm/slub.c:2632
 ___slab_alloc+0xc15/0x1500 mm/slub.c:3819
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3909
 __slab_alloc_node mm/slub.c:3962 [inline]
 slab_alloc_node mm/slub.c:4123 [inline]
 __do_kmalloc_node mm/slub.c:4264 [inline]
 __kmalloc_node_track_caller_noprof+0x365/0x440 mm/slub.c:4284
 __do_krealloc mm/slab_common.c:1219 [inline]
 krealloc_noprof+0x5d/0x130 mm/slab_common.c:1268
 add_sysfs_param+0xcb/0x930 kernel/params.c:654
 kernel_add_sysfs_param kernel/params.c:817 [inline]
 param_sysfs_builtin kernel/params.c:856 [inline]
 param_sysfs_builtin_init+0x253/0x3c0 kernel/params.c:990
 do_one_initcall+0x128/0x630 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x660/0xc50 init/main.c:1580
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88814b0d8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88814b0d8680: 00 00 00 00 00 00 00 06 fc fc fc fc fc fc fc fc
>ffff88814b0d8700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88814b0d8780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88814b0d8800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================