================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff888216b720c0 by task syz-executor777/8603 CPU: 0 PID: 8603 Comm: syz-executor777 Not tainted 5.2.0-rc1+ #21 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: 0033:0x4401f9 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:00007ffdb9395838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80 R13: 0000000000401b10 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_kmalloc+0x9/0x10 mm/kasan/common.c:503 kmem_cache_alloc_trace+0x151/0x750 mm/slab.c:3555 kmalloc include/linux/slab.h:547 [inline] kzalloc include/linux/slab.h:742 [inline] call_usermodehelper_setup+0x9b/0x320 kernel/umh.c:385 kobject_uevent_env+0xf88/0x101d lib/kobject_uevent.c:613 kobject_uevent+0x20/0x26 lib/kobject_uevent.c:641 rx_queue_add_kobject net/core/net-sysfs.c:942 [inline] net_rx_queue_update_kobjects+0x132/0x470 net/core/net-sysfs.c:960 register_queue_kobjects net/core/net-sysfs.c:1531 [inline] netdev_register_kobject+0x278/0x3b0 net/core/net-sysfs.c:1754 register_netdevice+0x875/0xff0 net/core/dev.c:8743 __ip_tunnel_create+0x36b/0x530 net/ipv4/ip_tunnel.c:282 ip_tunnel_init_net+0x375/0x9e0 net/ipv4/ip_tunnel.c:1073 erspan_init_net+0x2a/0x30 net/ipv4/ip_gre.c:1594 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 ipgre_init+0x6f/0x1a4 net/ipv4/ip_gre.c:1624 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 3557: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459 __cache_free mm/slab.c:3432 [inline] kfree+0xcf/0x220 mm/slab.c:3755 call_usermodehelper_freeinfo kernel/umh.c:47 [inline] umh_complete kernel/umh.c:61 [inline] umh_complete+0x8d/0xa0 kernel/umh.c:50 call_usermodehelper_exec_async+0x47a/0x740 kernel/umh.c:121 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff888216b72000 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff888216b72000, ffff888216b720c0) The buggy address belongs to the page: page:ffffea00085adc80 refcount:1 mapcount:0 mapping:ffff8880aa400040 index:0xffff888216b72000 flags: 0x6fffc0000000200(slab) raw: 06fffc0000000200 ffffea0008596bc8 ffffea00085ad848 ffff8880aa400040 raw: ffff888216b72000 ffff888216b72000 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888216b71f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888216b72000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888216b72080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888216b72100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888216b72180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================