------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 4484 at lib/refcount.c:31 refcount_warn_saturate+0x1e8/0x20c lib/refcount.c:31
Modules linked in:
CPU: 0 PID: 4484 Comm: syz.3.27 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1e8/0x20c lib/refcount.c:31
lr : refcount_warn_saturate+0x1e8/0x20c lib/refcount.c:31
sp : ffff800021a07750
x29: ffff800021a07750 x28: dfff800000000000 x27: ffff0000db077080
x26: dfff800000000000 x25: ffff700004340ef4 x24: ffff0000ca7f6c10
x23: ffff0000f2c5d000 x22: ffff800021a077c0 x21: 0000000000000004
x20: ffff0000dc3a45fc x19: ffff8000184d6000 x18: 1fffe00036798976
x17: ffff800015aed000 x16: ffff800008302574 x15: ffff0001b3cc4bbc
x14: 1ffff00002b5e0b2 x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000003 x9 : a015f93149f18000
x8 : a015f93149f18000 x7 : ffff8000082783ec x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff80001247d5a0 x0 : ffff80019e280000
Call trace:
 refcount_warn_saturate+0x1e8/0x20c lib/refcount.c:31
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 ref_tracker_free+0x550/0x6ac lib/ref_tracker.c:118
 netdev_tracker_free include/linux/netdevice.h:4063 [inline]
 netdev_put include/linux/netdevice.h:4080 [inline]
 ax25_release+0x350/0x8ac net/ax25/af_ax25.c:1069
 __sock_release net/socket.c:654 [inline]
 sock_close+0xb8/0x1fc net/socket.c:1400
 __fput+0x1c8/0x7c8 fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0x240/0x2f0 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x2080/0x2cb8 arch/arm64/kernel/signal.c:1132
 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+0x9c/0x168 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: 3148
hardirqs last  enabled at (3147): [<ffff80000827848c>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (3147): [<ffff80000827848c>] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:5000
hardirqs last disabled at (3148): [<ffff80001231b6dc>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (3100): [<ffff80001149a0a0>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (3100): [<ffff80001149a0a0>] ax25_cb_del+0x14c/0x198 net/ax25/af_ax25.c:70
softirqs last disabled at (3098): [<ffff800011499f84>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (3098): [<ffff800011499f84>] ax25_cb_del+0x30/0x198 net/ax25/af_ax25.c:65
---[ end trace 0000000000000000 ]---