------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 1 PID: 9294 at lib/refcount.c:31 refcount_warn_saturate+0x1d7/0x1f0 lib/refcount.c:31 Modules linked in: CPU: 1 PID: 9294 Comm: syz-executor.5 Not tainted 6.4.0-rc6-next-20230616-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:refcount_warn_saturate+0x1d7/0x1f0 lib/refcount.c:31 Code: 05 9f 85 7e 0a 01 e8 c8 a5 36 fd 0f 0b e9 d3 fe ff ff e8 6c 23 6f fd 48 c7 c7 a0 3e c7 8a c6 05 7c 85 7e 0a 01 e8 a9 a5 36 fd <0f> 0b e9 b4 fe ff ff 48 89 ef e8 ba 75 c2 fd e9 5c fe ff ff 0f 1f RSP: 0018:ffffc900168671b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000b682000 RDX: 0000000000040000 RSI: ffffffff814be5f7 RDI: 0000000000000001 RBP: ffff88807ff585fc R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff92002d0ce3c R13: 00000000ffffffef R14: ffff88807ff585fc R15: ffff88802cfcf5a8 FS: 00007f979c5d7700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555560e7708 CR3: 000000001f9a1000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] ref_tracker_free+0x539/0x820 lib/ref_tracker.c:236 netdev_tracker_free include/linux/netdevice.h:4097 [inline] netdev_put include/linux/netdevice.h:4114 [inline] netdev_put include/linux/netdevice.h:4110 [inline] fib6_nh_init+0xb96/0x1bd0 net/ipv6/route.c:3624 ip6_route_info_create+0x10f3/0x1980 net/ipv6/route.c:3791 ip6_route_add+0x28/0x150 net/ipv6/route.c:3835 inet6_rtm_newroute+0x156/0x160 net/ipv6/route.c:5504 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6424 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2548 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xde/0x190 net/socket.c:748 ____sys_sendmsg+0x739/0x920 net/socket.c:2494 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2548 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2577 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 RIP: 0033:0x7f979b88c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f979c5d7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f979b9abf80 RCX: 00007f979b88c389 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00007f979b8d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd49f71fcf R14: 00007f979c5d7300 R15: 0000000000022000