================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff8882165ecdc0 by task syz-executor906/9322 CPU: 0 PID: 9322 Comm: syz-executor906 Not tainted 5.2.0-rc1+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 kasan_report+0x12/0x20 mm/kasan/common.c:614 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4302 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] rhashtable_walk_enter+0xf9/0x390 lib/rhashtable.c:669 __tipc_dump_start+0x1fa/0x3c0 net/tipc/socket.c:3414 tipc_dump_start+0x70/0x90 net/tipc/socket.c:3396 __netlink_dump_start+0x4f8/0x7d0 net/netlink/af_netlink.c:2351 netlink_dump_start include/linux/netlink.h:226 [inline] tipc_sock_diag_handler_dump+0x1d9/0x270 net/tipc/diag.c:91 __sock_diag_cmd net/core/sock_diag.c:232 [inline] sock_diag_rcv_msg+0x319/0x410 net/core/sock_diag.c:263 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2486 sock_diag_rcv+0x2b/0x40 net/core/sock_diag.c:274 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1926 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:671 ___sys_sendmsg+0x803/0x920 net/socket.c:2292 __sys_sendmsg+0x105/0x1d0 net/socket.c:2330 __do_sys_sendmsg net/socket.c:2339 [inline] __se_sys_sendmsg net/socket.c:2337 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2337 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440219 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe59b331e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 1: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc mm/slab.c:3326 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3488 kmem_cache_zalloc include/linux/slab.h:732 [inline] __kernfs_new_node+0xf0/0x6c0 fs/kernfs/dir.c:632 kernfs_new_node+0x96/0x120 fs/kernfs/dir.c:698 kernfs_create_dir_ns+0x52/0x160 fs/kernfs/dir.c:1023 sysfs_create_dir_ns+0x131/0x2a0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:89 [inline] kobject_add_internal lib/kobject.c:255 [inline] kobject_add_internal.cold+0x116/0x662 lib/kobject.c:225 kset_register+0x2e/0x70 lib/kobject.c:862 kset_create_and_add+0x12f/0x1a0 lib/kobject.c:999 register_queue_kobjects net/core/net-sysfs.c:1523 [inline] netdev_register_kobject+0x1c1/0x3b0 net/core/net-sysfs.c:1754 register_netdevice+0x875/0xff0 net/core/dev.c:8743 register_netdev+0x30/0x50 net/core/dev.c:8861 vti6_init_net+0x518/0x820 net/ipv6/ip6_vti.c:1126 ops_init+0xb3/0x410 net/core/net_namespace.c:129 __register_pernet_operations net/core/net_namespace.c:1092 [inline] register_pernet_operations+0x382/0x7f0 net/core/net_namespace.c:1163 register_pernet_device+0x2a/0x80 net/core/net_namespace.c:1250 vti6_tunnel_init+0x19/0x176 net/ipv6/ip6_vti.c:1195 do_one_initcall+0x107/0x7ba init/main.c:914 do_initcall_level init/main.c:982 [inline] do_initcalls init/main.c:990 [inline] do_basic_setup init/main.c:1008 [inline] kernel_init_freeable+0x4d4/0x5c3 init/main.c:1168 kernel_init+0x12/0x1c5 init/main.c:1086 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8882165ecd20 which belongs to the cache kernfs_node_cache of size 160 The buggy address is located 0 bytes to the right of 160-byte region [ffff8882165ecd20, ffff8882165ecdc0) The buggy address belongs to the page: page:ffffea0008597b00 refcount:1 mapcount:0 mapping:ffff8880aa5967c0 index:0xffff8882165ecfee flags: 0x6fffc0000000200(slab) raw: 06fffc0000000200 ffffea0008591648 ffffea0008597b48 ffff8880aa5967c0 raw: ffff8882165ecfee ffff8882165ec000 0000000100000012 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8882165ecc80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff8882165ecd00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8882165ecd80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8882165ece00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8882165ece80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 ==================================================================