================================================================== 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 ffff888029bc6820 by task krxrpcio/7001/5093 CPU: 1 PID: 5093 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+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x461 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 18103: 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+0xa3/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc+0x5a/0xd0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ieee802_11_parse_elems_full+0x106/0x1330 net/mac80211/util.c:1655 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2260 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2267 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline] ieee80211_ibss_rx_queued_mgmt+0xd58/0x3160 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1635 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 Freed by task 18103: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] __cache_free mm/slab.c:3394 [inline] __do_kmem_cache_free mm/slab.c:3580 [inline] __kmem_cache_free+0xcd/0x3b0 mm/slab.c:3587 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1b22/0x3160 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1635 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+0x7b/0x90 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 The buggy address belongs to the object at ffff888029bc6800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 32 bytes inside of 1024-byte region [ffff888029bc6800, ffff888029bc6c00) The buggy address belongs to the physical page: page:ffffea0000a6f180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29bc6 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012040700 ffffea000147efd0 ffffea00007d5f10 raw: 0000000000000000 ffff888029bc6000 0000000100000002 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 0x3c2220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE), pid 5069, tgid 5047 (syz-fuzzer), ts 729280773460, free_ts 729250993989 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_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x94/0x390 mm/slab.c:2574 cache_alloc_refill+0x27f/0x380 mm/slab.c:2947 ____cache_alloc mm/slab.c:3023 [inline] ____cache_alloc mm/slab.c:3006 [inline] __do_cache_alloc mm/slab.c:3206 [inline] slab_alloc_node mm/slab.c:3254 [inline] __kmem_cache_alloc_node+0x44f/0x510 mm/slab.c:3544 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x4b/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] __tcp_send_ack.part.0+0x67/0x760 net/ipv4/tcp_output.c:3957 __tcp_send_ack net/ipv4/tcp_output.c:3989 [inline] tcp_send_ack+0x81/0xa0 net/ipv4/tcp_output.c:3989 __tcp_cleanup_rbuf+0x356/0x470 net/ipv4/tcp.c:1617 tcp_recvmsg_locked+0x72c/0x22b0 net/ipv4/tcp.c:2649 tcp_recvmsg+0x117/0x620 net/ipv4/tcp.c:2679 inet_recvmsg+0x114/0x5e0 net/ipv4/af_inet.c:861 sock_recvmsg_nosec net/socket.c:995 [inline] sock_recvmsg net/socket.c:1013 [inline] sock_recvmsg net/socket.c:1009 [inline] sock_read_iter+0x348/0x480 net/socket.c:1086 call_read_iter include/linux/fs.h:2180 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7fa/0x930 fs/read_write.c:470 ksys_read+0x1ec/0x250 fs/read_write.c:613 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+0x65c/0xc00 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 slab_destroy mm/slab.c:1619 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1639 cache_flusharray mm/slab.c:3365 [inline] ___cache_free+0x2ac/0x3d0 mm/slab.c:3428 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 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/slab.c:3261 [inline] __kmem_cache_alloc_node+0x26b/0x510 mm/slab.c:3544 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x4a/0xd0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x22d/0x430 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x140 security/security.c:1375 vfs_getattr fs/stat.c:161 [inline] vfs_statx+0x16e/0x430 fs/stat.c:236 vfs_fstatat+0x90/0xb0 fs/stat.c:270 vfs_lstat include/linux/fs.h:3295 [inline] __do_sys_newlstat+0x8e/0x110 fs/stat.c:426 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff888029bc6700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888029bc6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888029bc6800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029bc6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029bc6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================