svc: failed to register nfsdv3 RPC service (errno 101). svc: failed to register nfsaclv3 RPC service (errno 101). ================================================================== BUG: KASAN: slab-use-after-free in shrinker_free+0x3b7/0x430 mm/shrinker.c:775 Read of size 4 at addr ffff888060f3c31c by task syz.2.2521/17868 CPU: 1 UID: 0 PID: 17868 Comm: syz.2.2521 Not tainted 6.11.0-syzkaller-11993-g3efc57369a0c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __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: 0033:0x7f060157dff9 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:00007f0600fde038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0601736058 RCX: 00007f060157dff9 RDX: 0000000000008004 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f06015f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0601736058 R15: 00007ffea19de328 Allocated by task 17735: 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 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1e8/0x410 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] new_dir fs/proc/proc_sysctl.c:956 [inline] get_subdir fs/proc/proc_sysctl.c:1000 [inline] sysctl_mkdir_p fs/proc/proc_sysctl.c:1309 [inline] __register_sysctl_table+0xeac/0x18c0 fs/proc/proc_sysctl.c:1384 vrf_netns_init_sysctl drivers/net/vrf.c:1940 [inline] vrf_netns_init+0x152/0x1f0 drivers/net/vrf.c:1978 ops_init+0x1df/0x5f0 net/core/net_namespace.c:139 setup_net+0x21f/0x860 net/core/net_namespace.c:356 copy_net_ns+0x2b4/0x6b0 net/core/net_namespace.c:494 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x419/0x970 kernel/fork.c:3315 __do_sys_unshare kernel/fork.c:3386 [inline] __se_sys_unshare kernel/fork.c:3384 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3384 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 6162: 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_freelist_hook mm/slub.c:2372 [inline] slab_free_bulk mm/slub.c:4604 [inline] kmem_cache_free_bulk.part.0+0x28e/0x7c0 mm/slub.c:4848 kfree_bulk include/linux/slab.h:767 [inline] kvfree_rcu_bulk+0x454/0x550 kernel/rcu/tree.c:3385 kfree_rcu_work+0x2f2/0x5a0 kernel/rcu/tree.c:3464 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 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 kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3809 drop_sysctl_table+0x2f9/0x540 fs/proc/proc_sysctl.c:1510 unregister_sysctl_table fs/proc/proc_sysctl.c:1531 [inline] unregister_sysctl_table+0x41/0x60 fs/proc/proc_sysctl.c:1523 vrf_netns_exit_sysctl drivers/net/vrf.c:1956 [inline] vrf_netns_exit+0x6c/0x90 drivers/net/vrf.c:1983 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:626 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 ffff888060f3c300 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 28 bytes inside of freed 192-byte region [ffff888060f3c300, ffff888060f3c3c0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x60f3c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac413c0 ffffea00009b4ac0 dead000000000002 raw: 0000000000000000 0000000000100010 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5323, tgid 5322 (syz.3.10), ts 60868834344, free_ts 60450161559 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_node_noprof include/linux/gfp.h:269 [inline] alloc_slab_page mm/slub.c:2415 [inline] allocate_slab mm/slub.c:2579 [inline] new_slab+0xca/0x3f0 mm/slub.c:2632 ___slab_alloc+0xd1d/0x16f0 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_noprof+0x367/0x440 mm/slub.c:4271 kmalloc_array_node_noprof include/linux/slab.h:995 [inline] alloc_slab_obj_exts+0x41/0xa0 mm/slub.c:1969 account_slab mm/slub.c:2542 [inline] allocate_slab mm/slub.c:2597 [inline] new_slab+0x305/0x3f0 mm/slub.c:2632 ___slab_alloc+0xd1d/0x16f0 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] kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4142 sk_prot_alloc+0x60/0x2a0 net/core/sock.c:2158 sk_alloc+0x36/0xb90 net/core/sock.c:2217 inet_create net/ipv4/af_inet.c:326 [inline] inet_create+0x3a1/0x1070 net/ipv4/af_inet.c:252 __sock_create+0x32e/0x800 net/socket.c:1576 page last free pid 5308 tgid 5308 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638 __put_partials+0x14c/0x170 mm/slub.c:3146 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4142 ptlock_alloc+0x1f/0x70 mm/memory.c:6902 ptlock_init include/linux/mm.h:2958 [inline] pagetable_pte_ctor include/linux/mm.h:2985 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline] pte_alloc_one+0x74/0x360 arch/x86/mm/pgtable.c:33 do_fault_around mm/memory.c:5234 [inline] do_read_fault mm/memory.c:5273 [inline] do_fault mm/memory.c:5416 [inline] do_pte_missing+0x1ae0/0x3e50 mm/memory.c:3965 handle_pte_fault mm/memory.c:5751 [inline] __handle_mm_fault+0x100a/0x2a10 mm/memory.c:5894 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6062 do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 Memory state around the buggy address: ffff888060f3c200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888060f3c280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888060f3c300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888060f3c380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888060f3c400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================