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 ffff8880301ac010 by task syz.1.6512/8295 CPU: 1 UID: 0 PID: 8295 Comm: syz.1.6512 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #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 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/0x470 fs/nfsd/filecache.c:837 nfsd_file_cache_shutdown+0xcf/0x4e0 fs/nfsd/filecache.c:929 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: 0033:0x7fd3c577dff9 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:00007fd3c65a7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd3c5935f80 RCX: 00007fd3c577dff9 RDX: 0000000000008004 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007fd3c57f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd3c5935f80 R15: 00007ffca7d46f08 Allocated by task 8199: 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_node_noprof+0x211/0x440 mm/slub.c:4271 __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:658 bucket_table_alloc.isra.0+0x86/0x460 lib/rhashtable.c:186 rhashtable_init_noprof+0x43b/0x7d0 lib/rhashtable.c:1071 rhltable_init_noprof+0x20/0x60 lib/rhashtable.c:1100 nfsd_file_cache_init+0xd2/0x4d0 fs/nfsd/filecache.c:752 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 8199: 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 kvfree+0x47/0x50 mm/util.c:701 rhashtable_free_and_destroy+0x16c/0x990 lib/rhashtable.c:1169 rhltable_free_and_destroy include/linux/rhashtable.h:1278 [inline] rhltable_destroy include/linux/rhashtable.h:1283 [inline] nfsd_file_cache_init+0x3e0/0x4d0 fs/nfsd/filecache.c:818 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 The buggy address belongs to the object at ffff8880301ac000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 16 bytes inside of freed 4096-byte region [ffff8880301ac000, ffff8880301ad000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x301a8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801ac42140 ffffea0000db9800 dead000000000002 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801ac42140 ffffea0000db9800 dead000000000002 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000c06a01 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 21493, tgid 21493 (syz.0.3187), ts 1292101106947, free_ts 1292053895765 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+0x2c9/0x610 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2413 [inline] allocate_slab mm/slub.c:2579 [inline] new_slab+0x2ba/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_noprof+0x379/0x410 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xbf/0x710 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x2a7/0x3b0 security/tomoyo/file.c:771 tomoyo_file_open+0xcf/0x100 security/tomoyo/hooks.h:308 security_file_open+0x64c/0x9d0 security/security.c:3107 do_dentry_open+0x57c/0x1530 fs/open.c:945 vfs_open+0x82/0x3f0 fs/open.c:1088 do_open fs/namei.c:3774 [inline] path_openat+0x1e6a/0x2d60 fs/namei.c:3933 do_filp_open+0x1dc/0x430 fs/namei.c:3960 page last free pid 12198 tgid 12198 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_node_noprof+0x153/0x310 mm/slub.c:4187 __alloc_skb+0x2b3/0x380 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1322 [inline] alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6612 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2883 sock_alloc_send_skb include/net/sock.h:1780 [inline] mld_newpack.isra.0+0x1d4/0x7e0 net/ipv6/mcast.c:1747 add_grhead+0x299/0x340 net/ipv6/mcast.c:1850 add_grec+0x111e/0x1670 net/ipv6/mcast.c:1988 mld_send_cr net/ipv6/mcast.c:2114 [inline] mld_ifc_work+0x41f/0xca0 net/ipv6/mcast.c:2651 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 Memory state around the buggy address: ffff8880301abf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880301abf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880301ac000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880301ac080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880301ac100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================