------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 1 PID: 19983 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Modules linked in: CPU: 1 PID: 19983 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-12277-g56fb6f92854f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Code: b2 00 00 00 e8 27 b8 ef fc 5b 5d c3 cc cc cc cc e8 1b b8 ef fc c6 05 fc 35 f0 0a 01 90 48 c7 c7 a0 bf 1e 8c e8 47 e8 b1 fc 90 <0f> 0b 90 90 eb d9 e8 fb b7 ef fc c6 05 d9 35 f0 0a 01 90 48 c7 c7 RSP: 0018:ffffc9001b83f908 EFLAGS: 00010246 RAX: 2a301f9112304400 RBX: ffff88807b02a664 RCX: 0000000000040000 RDX: ffffc9000b33b000 RSI: 000000000000ca38 RDI: 000000000000ca39 RBP: 0000000000000004 R08: ffffffff815846c2 R09: 1ffffffff25ededb R10: dffffc0000000000 R11: fffffbfff25ededc R12: ffff88807b02a620 R13: 0000000000000000 R14: ffff88807b02a664 R15: dffffc0000000000 FS: 00007f475dfe66c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff2b9901723 CR3: 000000007ac0a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec include/linux/refcount.h:351 [inline] ref_tracker_free+0x6af/0x7e0 lib/ref_tracker.c:236 netdev_tracker_free include/linux/netdevice.h:4058 [inline] netdev_put include/linux/netdevice.h:4075 [inline] ax25_release+0x368/0x950 net/ax25/af_ax25.c:1069 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 get_signal+0x15e6/0x1740 kernel/signal.c:2681 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f475d27cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f475dfe60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 00007f475d3ac050 RCX: 00007f475d27cee9 RDX: 0000000000000019 RSI: 0000000000000101 RDI: 0000000000000004 RBP: 00007f475d2c949e R08: 0000000000000010 R09: 0000000000000000 R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f475d3ac050 R15: 00007ffd8cfeadc8