------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 9506 at lib/refcount.c:31 refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
Modules linked in:
CPU: 0 PID: 9506 Comm: syz.3.1438 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
lr : refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
sp : ffff8000208a7700
x29: ffff8000208a7700 x28: 1fffe0001bba8805 x27: dfff800000000000
x26: dfff800000000000 x25: ffff700004114ee8 x24: ffff0000d2b47000
x23: ffff0000d2b47010 x22: ffff8000208a7740 x21: 0000000000000000
x20: ffff0000dcb625fc x19: ffff800017bda000 x18: ffff800011b8bf60
x17: 1fffe00033ea877e x16: ffff8000082d91a4 x15: 0000000040000000
x14: 0000000000000001 x13: 1fffe00033eaae30 x12: 0000000000ff0100
x11: ff0080000a8db964 x10: 0000000000000003 x9 : 59a2ca32eac09100
x8 : 59a2ca32eac09100 x7 : ffff80000825796c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011b8da80 x0 : ffff80018a3de000
Call trace:
 refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 ref_tracker_free+0x560/0x6b4 lib/ref_tracker.c:118
 netdev_tracker_free include/linux/netdevice.h:4071 [inline]
 netdev_put include/linux/netdevice.h:4088 [inline]
 ax25_release+0x2c8/0x87c net/ax25/af_ax25.c:1080
 __sock_release net/socket.c:654 [inline]
 sock_close+0xb4/0x1f8 net/socket.c:1399
 __fput+0x1bc/0x7b8 fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0x1ec/0x278 kernel/task_work.c:203
 get_signal+0x111c/0x1304 kernel/signal.c:2648
 do_signal arch/arm64/kernel/signal.c:1095 [inline]
 do_notify_resume+0x33c/0x2aa4 arch/arm64/kernel/signal.c:1148
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 496
hardirqs last  enabled at (495): [<ffff800008257a00>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (495): [<ffff800008257a00>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004
hardirqs last disabled at (496): [<ffff800011a288ec>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (448): [<ffff800010ba2348>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (448): [<ffff800010ba2348>] ax25_cb_del+0x14c/0x194 net/ax25/af_ax25.c:70
softirqs last disabled at (446): [<ffff800010ba222c>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (446): [<ffff800010ba222c>] ax25_cb_del+0x30/0x194 net/ax25/af_ax25.c:65
---[ end trace 0000000000000000 ]---