================================================================== BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:884 [inline] BUG: KASAN: use-after-free in hlist_del_init_rcu include/linux/rculist.h:184 [inline] BUG: KASAN: use-after-free in rxrpc_destroy_local+0x2ad/0x2f0 net/rxrpc/local_object.c:389 Write of size 8 at addr ffff888149974820 by task krxrpcio/7001/8581 CPU: 1 PID: 8581 Comm: krxrpcio/7001 Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517 __hlist_del include/linux/list.h:884 [inline] hlist_del_init_rcu include/linux/rculist.h:184 [inline] rxrpc_destroy_local+0x2ad/0x2f0 net/rxrpc/local_object.c:389 rxrpc_io_thread+0xcde/0xfa0 net/rxrpc/io_thread.c:492 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 19786: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc_node_track_caller+0x5b/0xc0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0xe9/0x310 net/core/skbuff.c:565 alloc_skb include/linux/skbuff.h:1270 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:469 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:391 [inline] vhci_write+0xc1/0x460 drivers/bluetooth/hci_vhci.c:511 call_write_iter include/linux/fs.h:2186 [inline] do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735 do_iter_write+0x182/0x700 fs/read_write.c:861 vfs_writev+0x1aa/0x630 fs/read_write.c:934 do_writev+0x133/0x2f0 fs/read_write.c:977 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 19785: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x3b0 mm/slub.c:3800 skb_free_head+0xac/0x110 net/core/skbuff.c:822 skb_release_data+0x5f4/0x870 net/core/skbuff.c:851 skb_release_all net/core/skbuff.c:916 [inline] __kfree_skb net/core/skbuff.c:930 [inline] kfree_skb_reason+0x1ab/0x4f0 net/core/skbuff.c:956 kfree_skb include/linux/skbuff.h:1218 [inline] hci_event_packet+0x13d/0xfd0 net/bluetooth/hci_event.c:7499 hci_rx_work+0xaeb/0x1230 net/bluetooth/hci_core.c:4043 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 __call_rcu_common.constprop.0+0x99/0x820 kernel/rcu/tree.c:2753 rxrpc_put_local.part.0+0x128/0x170 net/rxrpc/local_object.c:332 rxrpc_put_local+0x25/0x30 net/rxrpc/local_object.c:324 rxrpc_clean_up_connection+0x3ac/0x4b0 net/rxrpc/conn_object.c:318 rxrpc_put_connection.part.0+0x1e8/0x210 net/rxrpc/conn_object.c:356 rxrpc_put_connection+0x25/0x30 net/rxrpc/conn_object.c:339 rxrpc_discard_expired_client_conns+0x388/0x500 net/rxrpc/conn_client.c:1059 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 __call_rcu_common.constprop.0+0x99/0x820 kernel/rcu/tree.c:2753 sctp_transport_destroy net/sctp/transport.c:171 [inline] sctp_transport_put+0x121/0x180 net/sctp/transport.c:483 sctp_association_free+0x4d0/0x7d0 net/sctp/associola.c:379 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x33ff/0x5290 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x38a/0x6c0 net/sctp/associola.c:1051 sctp_inq_push+0x1d6/0x270 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x19a/0x5b0 net/sctp/input.c:331 sk_backlog_rcv include/net/sock.h:1109 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2928 release_sock+0x58/0x1b0 net/core/sock.c:3484 sctp_wait_for_connect+0x416/0x5c0 net/sctp/socket.c:9317 sctp_sendmsg_to_asoc+0x11d1/0x1a30 net/sctp/socket.c:1879 sctp_sendmsg+0xf05/0x1d90 net/sctp/socket.c:2025 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:827 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888149974800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 32 bytes inside of 1024-byte region [ffff888149974800, ffff888149974c00) The buggy address belongs to the physical page: page:ffffea0005265c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x149970 head:ffffea0005265c00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000010200 ffff888012441dc0 ffffea000522dc00 dead000000000002 raw: 0000000000000000 0000000000100010 00000001ffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 8799263271, free_ts 0 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2118 alloc_pages+0x233/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x4d/0xd0 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:581 kvmalloc include/linux/slab.h:737 [inline] kvzalloc include/linux/slab.h:745 [inline] bucket_table_alloc.isra.0+0x8c/0x480 lib/rhashtable.c:184 rhashtable_init+0x38b/0x7e0 lib/rhashtable.c:1065 tcf_ct_flow_tables_init net/sched/act_ct.c:643 [inline] ct_init_module+0x4f/0xcb net/sched/act_ct.c:1610 do_one_initcall+0x141/0x790 init/main.c:1306 do_initcall_level init/main.c:1379 [inline] do_initcalls init/main.c:1395 [inline] do_basic_setup init/main.c:1414 [inline] kernel_init_freeable+0x6f9/0x782 init/main.c:1634 kernel_init+0x1e/0x1d0 init/main.c:1522 page_owner free stack trace missing Memory state around the buggy address: ffff888149974700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888149974780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888149974800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888149974880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888149974900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================