refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 16877 at lib/refcount.c:31 refcount_warn_saturate+0x16d/0x1a0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 16877 Comm: syz.0.2669 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:refcount_warn_saturate+0x16d/0x1a0 lib/refcount.c:31
Code: c7 c7 00 2e 5f 8b e8 72 ef 0e fd 0f 0b e9 6e ff ff ff e8 46 d9 46 fd c6 05 62 8b 48 0a 01 48 c7 c7 60 2e 5f 8b e8 53 ef 0e fd <0f> 0b e9 4f ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c b2 fe ff
RSP: 0018:ffffc900041ef7a8 EFLAGS: 00010246
RAX: 2201bed0d8d1c400 RBX: 0000000000000004 RCX: 0000000000080000
RDX: ffffc90010deb000 RSI: 0000000000016b2d RDI: 0000000000016b2e
RBP: 0000000000000004 R08: ffffffff8152c26e R09: fffff5200083de55
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807df225b8
R13: 0000000000000000 R14: ffff88807df225fc R15: dffffc0000000000
FS:  00007fca9368e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffbb8ef128 CR3: 00000000765c0000 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+0x6a0/0x7d0 lib/ref_tracker.c:118
 netdev_tracker_free include/linux/netdevice.h:4071 [inline]
 netdev_put include/linux/netdevice.h:4088 [inline]
 ax25_release+0x3ef/0x950 net/ax25/af_ax25.c:1080
 __sock_release net/socket.c:654 [inline]
 sock_close+0xcd/0x230 net/socket.c:1400
 __fput+0x3f6/0x8d0 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:203
 get_signal+0x15d0/0x17a0 kernel/signal.c:2648
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fca9278d169
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:00007fca9368e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffe00 RBX: 00007fca929a6080 RCX: 00007fca9278d169
RDX: 0000000000000048 RSI: 00002000000001c0 RDI: 0000000000000008
RBP: 00007fca9280e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fca929a6080 R15: 00007fff08c95048
 </TASK>