------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 8148 at lib/refcount.c:31 refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 8148 Comm: syz.1.1521 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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 : ffff800021567800
x29: ffff800021567800 x28: 1fffe0001ba69505 x27: dfff800000000000
x26: dfff800000000000 x25: ffff7000042acf08 x24: ffff0000d1bb1400
x23: ffff0000d1bb1410 x22: ffff800021567840 x21: 0000000000000000
x20: ffff0000dc57c5fc x19: ffff800017a78000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d2370 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100
x11: ff00800008191c9c x10: 0000000000000000 x9 : a983b6e30aedb700
x8 : a983b6e30aedb700 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021567298 x4 : ffff800015194800 x3 : ffff80000852e348
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
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+0x538/0x694 lib/ref_tracker.c:118
 netdev_tracker_free include/linux/netdevice.h:4071 [inline]
 netdev_put include/linux/netdevice.h:4088 [inline]
 ax25_release+0x2c8/0x88c net/ax25/af_ax25.c:1080
 __sock_release net/socket.c:654 [inline]
 sock_close+0xb4/0x1f8 net/socket.c:1400
 __fput+0x1bc/0x7c0 fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0x1ec/0x270 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137
 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+0x98/0x138 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: 2992
hardirqs last  enabled at (2991): [<ffff800008308488>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261
hardirqs last disabled at (2992): [<ffff800011948d00>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (2948): [<ffff800010ae7060>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (2948): [<ffff800010ae7060>] ax25_cb_del+0x14c/0x198 net/ax25/af_ax25.c:70
softirqs last disabled at (2946): [<ffff800010ae6f44>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (2946): [<ffff800010ae6f44>] ax25_cb_del+0x30/0x198 net/ax25/af_ax25.c:65
---[ end trace 0000000000000000 ]---