================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline] BUG: KASAN: use-after-free in rxrpc_destroy_all_locals+0x10a/0x180 net/rxrpc/local_object.c:434 Read of size 4 at addr ffff88813ff2d814 by task kworker/u4:18/6201 CPU: 0 PID: 6201 Comm: kworker/u4:18 Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: netns cleanup_net 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 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:72 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] refcount_read include/linux/refcount.h:147 [inline] rxrpc_destroy_all_locals+0x10a/0x180 net/rxrpc/local_object.c:434 rxrpc_exit_net+0x174/0x300 net/rxrpc/net_ns.c:128 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606 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 Allocated by task 11913: 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 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] rxrpc_alloc_local net/rxrpc/local_object.c:93 [inline] rxrpc_lookup_local+0x4d9/0xfb0 net/rxrpc/local_object.c:249 rxrpc_bind+0x35e/0x5c0 net/rxrpc/af_rxrpc.c:150 afs_open_socket+0x1b4/0x360 fs/afs/rxrpc.c:64 afs_net_init+0xa79/0xed0 fs/afs/main.c:126 ops_init+0xb9/0x680 net/core/net_namespace.c:135 setup_net+0x793/0xe60 net/core/net_namespace.c:333 copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x3b3/0x4a0 kernel/nsproxy.c:179 copy_process+0x30d3/0x7520 kernel/fork.c:2269 kernel_clone+0xeb/0x990 kernel/fork.c:2681 __do_sys_clone3+0x1cd/0x2e0 kernel/fork.c:2980 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 15: 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 rcu_do_batch kernel/rcu/tree.c:2244 [inline] rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2504 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 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_release_sock net/rxrpc/af_rxrpc.c:888 [inline] rxrpc_release+0x237/0x550 net/rxrpc/af_rxrpc.c:914 __sock_release net/socket.c:650 [inline] sock_release+0x8b/0x1b0 net/socket.c:678 afs_close_socket+0x1ce/0x330 fs/afs/rxrpc.c:125 afs_net_exit+0x179/0x320 fs/afs/main.c:158 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606 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 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3374 neigh_destroy+0x435/0x640 net/core/neighbour.c:931 neigh_release include/net/neighbour.h:449 [inline] neigh_cleanup_and_release+0x271/0x3d0 net/core/neighbour.c:103 neigh_periodic_work+0x616/0x9f0 net/core/neighbour.c:1013 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 ffff88813ff2d800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 20 bytes inside of 1024-byte region [ffff88813ff2d800, ffff88813ff2dc00) The buggy address belongs to the physical page: page:ffffea0004ffca00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13ff28 head:ffffea0004ffca00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 anon flags: 0x17ff00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 017ff00000010200 ffff888012441dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000001ffffffff 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 0x0(), pid 1, tgid 1 (swapper/0), ts 1430586624, free_ts 0 create_dummy_stack mm/page_owner.c:67 [inline] register_early_stack+0x65/0xa4 mm/page_owner.c:83 init_page_owner+0x5a/0x636 mm/page_owner.c:93 invoke_init_callbacks mm/page_ext.c:126 [inline] page_ext_init+0x4c2/0x4d5 mm/page_ext.c:518 kernel_init_freeable+0x4c4/0x782 init/main.c:1632 page_owner free stack trace missing Memory state around the buggy address: ffff88813ff2d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88813ff2d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88813ff2d800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88813ff2d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88813ff2d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================