------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 5430 at lib/refcount.c:31 refcount_warn_saturate+0x12f/0x150 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 5430 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:refcount_warn_saturate+0x12f/0x150 lib/refcount.c:31
Code: 60 80 c2 89 c6 05 5e 31 96 09 01 e8 bb b4 87 fd 0f 0b e9 4b ff ff ff 48 c7 c7 c0 81 c2 89 c6 05 40 31 96 09 01 e8 a1 b4 87 fd <0f> 0b e9 31 ff ff ff 48 89 df e8 e2 f9 01 fe e9 fc fe ff ff 66 66
RSP: 0018:ffffc90004ccef38 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888079d285fc RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000008 RDI: 0000000000000001
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffc90004ccec67
R10: fffff52000999d8c R11: 0000000000000001 R12: 1ffff92000999deb
R13: 00000000ffffffef R14: ffff888079d285fc R15: ffff88802144c8c0
FS:  00007f33ef32f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f56f472fb10 CR3: 000000001f6c8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 ref_tracker_free+0x485/0x740 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+0x92b/0x1890 net/ipv6/route.c:3624
 ip6_route_info_create+0xe9a/0x1830 net/ipv6/route.c:3791
 ip6_route_add+0x17/0x100 net/ipv6/route.c:3835
 inet6_rtm_newroute+0xfb/0x110 net/ipv6/route.c:5504
 rtnetlink_rcv_msg+0x331/0x9f0 net/core/rtnetlink.c:6424
 netlink_rcv_skb+0x12a/0x390 net/netlink/af_netlink.c:2548
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x437/0x710 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x790/0xc50 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xc0/0x150 net/socket.c:747
 splice_to_socket+0x738/0xd70 fs/splice.c:917
 do_splice_from fs/splice.c:969 [inline]
 direct_splice_actor+0xff/0x1d0 fs/splice.c:1157
 splice_direct_to_actor+0x2c2/0x820 fs/splice.c:1103
 do_splice_direct+0x14e/0x260 fs/splice.c:1209
 do_sendfile+0x93d/0x1170 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x18a/0x1d0 fs/read_write.c:1308
 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: 0033:0x7f33ee68c389
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:00007f33ef32f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f33ee7abf80 RCX: 00007f33ee68c389
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f33ee6d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 00000800000017fc R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6944cd3f R14: 00007f33ef32f300 R15: 0000000000022000
 </TASK>