------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 1 PID: 2809 at lib/refcount.c:31 refcount_warn_saturate+0x121/0x130 lib/refcount.c:31 Modules linked in: CPU: 1 UID: 0 PID: 2809 Comm: syz.0.15 Not tainted 6.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:refcount_warn_saturate+0x121/0x130 lib/refcount.c:31 Code: c7 c7 48 4f 45 82 e8 4e 9d a4 ff 90 0f 0b 90 90 c3 cc cc cc cc c6 05 26 89 25 01 01 90 48 c7 c7 1a 4f 45 82 e8 30 9d a4 ff 90 <0f> 0b 90 90 c3 cc cc cc cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90001e4f828 EFLAGS: 00010246 RAX: 431aa185d0ff9800 RBX: 00000000ffffffef RCX: 0000000000000002 RDX: 0000000000000002 RSI: 00000000ffffdfff RDI: 00000000ffffffff RBP: ffffc90001e4f8e8 R08: 0000000000000000 R09: ffffffff826c5f90 R10: ffffc90001e4f6f8 R11: ffffc90001e4f6a0 R12: ffff888101fa6580 R13: ffff88810d6d3000 R14: ffff888101fa6580 R15: ffff888108baa604 FS: 00007f8dd80ef6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9340cce440 CR3: 0000000100aca000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ref_tracker_free+0x299/0x2a0 netdev_tracker_free include/linux/netdevice.h:4042 [inline] netdev_put include/linux/netdevice.h:4059 [inline] ethnl_parse_header_dev_put net/ethtool/netlink.h:271 [inline] ethnl_phy_done+0x26/0x70 net/ethtool/phy.c:238 genl_done+0x40/0x80 net/netlink/genetlink.c:1043 netlink_dump+0x3eb/0x440 net/netlink/af_netlink.c:2370 __netlink_dump_start+0x258/0x2d0 net/netlink/af_netlink.c:2440 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:1076 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline] genl_rcv_msg+0x216/0x3d0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0xe0/0x110 net/netlink/af_netlink.c:2550 genl_rcv+0x23/0x30 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x1de/0x2d0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x33c/0x3e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x8e/0xb0 net/socket.c:745 ____sys_sendmsg+0x1a7/0x200 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2c7/0x310 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xe0/0x1f0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8dd866def9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8dd80ef038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8dd8825f80 RCX: 00007f8dd866def9 RDX: 0000000000000000 RSI: 0000000020001900 RDI: 0000000000000003 RBP: 00007f8dd86e09f6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8dd8825f80 R15: 00007ffda7e68488