================================================================== 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+0x104/0x290 net/rxrpc/local_object.c:389 Write of size 8 at addr ffff888149e5d820 by task krxrpcio/7001/5106 CPU: 0 PID: 5106 Comm: krxrpcio/7001 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #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+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x220 mm/kasan/report.c:417 kasan_report+0x139/0x170 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+0x104/0x290 net/rxrpc/local_object.c:389 rxrpc_io_thread+0x1d28/0x1f30 net/rxrpc/io_thread.c:492 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 12286: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 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+0xad/0x190 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x12c/0x2c0 net/core/skbuff.c:565 alloc_skb include/linux/skbuff.h:1270 [inline] __ip6_append_data+0x304a/0x45a0 net/ipv6/ip6_output.c:1684 ip6_append_data+0x1dd/0x3f0 net/ipv6/ip6_output.c:1854 rawv6_sendmsg+0x1709/0x2190 net/ipv6/raw.c:915 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2476 ___sys_sendmsg net/socket.c:2530 [inline] __sys_sendmmsg+0x3d7/0x770 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 __call_rcu_common kernel/rcu/tree.c:2753 [inline] call_rcu+0x163/0xab0 kernel/rcu/tree.c:2866 rxrpc_clean_up_connection+0x316/0x380 net/rxrpc/conn_object.c:318 rxrpc_discard_expired_client_conns+0x39b/0x4d0 net/rxrpc/conn_client.c:1059 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 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+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 __call_rcu_common kernel/rcu/tree.c:2753 [inline] call_rcu+0x163/0xab0 kernel/rcu/tree.c:2866 rxrpc_lookup_local+0x138c/0x1710 net/rxrpc/local_object.c:274 rxrpc_sendmsg+0x47d/0x8d0 net/rxrpc/af_rxrpc.c:543 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2476 __sys_sendmsg_sock+0x25/0x30 net/socket.c:2542 io_sendmsg+0x33b/0xa20 io_uring/net.c:315 io_issue_sqe+0x494/0xcd0 io_uring/io_uring.c:1836 io_queue_sqe io_uring/io_uring.c:2008 [inline] io_submit_sqe io_uring/io_uring.c:2266 [inline] io_submit_sqes+0xa7f/0x1ba0 io_uring/io_uring.c:2377 __do_sys_io_uring_enter io_uring/io_uring.c:3313 [inline] __se_sys_io_uring_enter+0x33b/0x22d0 io_uring/io_uring.c:3245 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888149e5d800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 32 bytes inside of 1024-byte region [ffff888149e5d800, ffff888149e5dc00) The buggy address belongs to the physical page: page:ffffea0005279600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888149e5e000 pfn:0x149e58 head:ffffea0005279600 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000010200 ffff888012841dc0 ffffea000515a410 ffffea00052cb010 raw: ffff888149e5e000 0000000000100004 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 18547, tgid 18546 (syz-executor.4), ts 632018319646, free_ts 382379523897 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x61/0x190 mm/slub.c:1853 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 kmalloc_node_trace+0x23/0x60 mm/slab_common.c:1075 kmalloc_node include/linux/slab.h:606 [inline] kzalloc_node include/linux/slab.h:731 [inline] io_wq_create+0x39f/0xc30 io_uring/io-wq.c:1164 io_init_wq_offload io_uring/tctx.c:44 [inline] io_uring_alloc_task_context+0x30d/0x620 io_uring/tctx.c:76 __io_uring_add_tctx_node+0x331/0x530 io_uring/tctx.c:101 io_uring_install_fd+0x32/0x70 io_uring/io_uring.c:3452 io_uring_create+0x927/0xe10 io_uring/io_uring.c:3657 io_uring_setup io_uring/io_uring.c:3697 [inline] __do_sys_io_uring_setup io_uring/io_uring.c:3703 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:3700 [inline] __x64_sys_io_uring_setup+0x226/0x2a0 io_uring/io_uring.c:3700 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476 getname_flags+0xb8/0x4e0 fs/namei.c:139 getname fs/namei.c:218 [inline] __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0x38/0x50 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888149e5d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888149e5d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888149e5d800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888149e5d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888149e5d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================