================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x3ba2/0x5490 kernel/locking/lockdep.c:3664 Read of size 8 at addr ffff88809b6bdcc0 by task syz-executor397/8874 CPU: 0 PID: 8874 Comm: syz-executor397 Not tainted 5.1.0+ #19 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:660 [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: 0033:0x4402c9 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:00007fff0c07a2b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402c9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b50 R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 8865: 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:3356 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3518 skb_clone+0x154/0x3d0 net/core/skbuff.c:1321 skb_share_check include/linux/skbuff.h:1655 [inline] packet_rcv_spkt+0x48b/0x5c0 net/packet/af_packet.c:1815 deliver_skb net/core/dev.c:1973 [inline] deliver_ptype_list_skb net/core/dev.c:1988 [inline] __netif_receive_skb_core+0xdb7/0x3060 net/core/dev.c:4948 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:4988 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 netif_receive_skb_internal+0x117/0x5c0 net/core/dev.c:5207 napi_skb_finish net/core/dev.c:5686 [inline] napi_gro_receive+0x52d/0x740 net/core/dev.c:5719 receive_buf+0xf8a/0x57c0 drivers/net/virtio_net.c:1073 virtnet_receive drivers/net/virtio_net.c:1335 [inline] virtnet_poll+0x5f8/0xe82 drivers/net/virtio_net.c:1440 napi_poll net/core/dev.c:6367 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6433 __do_softirq+0x25c/0x94c kernel/softirq.c:293 Freed by task 8865: 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:3462 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3728 kfree_skbmem net/core/skbuff.c:624 [inline] kfree_skbmem+0xc5/0x150 net/core/skbuff.c:618 __kfree_skb net/core/skbuff.c:681 [inline] kfree_skb net/core/skbuff.c:698 [inline] kfree_skb+0xf0/0x390 net/core/skbuff.c:692 packet_rcv_spkt+0xe6/0x5c0 net/packet/af_packet.c:1846 deliver_skb net/core/dev.c:1973 [inline] deliver_ptype_list_skb net/core/dev.c:1988 [inline] __netif_receive_skb_core+0xdb7/0x3060 net/core/dev.c:4948 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:4988 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5104 netif_receive_skb_internal+0x117/0x5c0 net/core/dev.c:5207 napi_skb_finish net/core/dev.c:5686 [inline] napi_gro_receive+0x52d/0x740 net/core/dev.c:5719 receive_buf+0xf8a/0x57c0 drivers/net/virtio_net.c:1073 virtnet_receive drivers/net/virtio_net.c:1335 [inline] virtnet_poll+0x5f8/0xe82 drivers/net/virtio_net.c:1440 napi_poll net/core/dev.c:6367 [inline] net_rx_action+0x4f5/0x1070 net/core/dev.c:6433 __do_softirq+0x25c/0x94c kernel/softirq.c:293 The buggy address belongs to the object at ffff88809b6bdbc0 which belongs to the cache skbuff_head_cache of size 224 The buggy address is located 32 bytes to the right of 224-byte region [ffff88809b6bdbc0, ffff88809b6bdca0) The buggy address belongs to the page: page:ffffea00026daf40 count:1 mapcount:0 mapping:ffff8880a99a0b00 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00026b77c8 ffffea00027b73c8 ffff8880a99a0b00 raw: 0000000000000000 ffff88809b6bd080 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809b6bdb80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88809b6bdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88809b6bdc80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88809b6bdd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809b6bdd80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================