ax25_connect(): syz.0.2883 uses autobind, please contact jreuter@yaina.de
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refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 15581 at lib/refcount.c:31 refcount_warn_saturate+0x194/0x1f8 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 15581 Comm: syz.0.2883 Not tainted 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 : ffff800020957700
x29: ffff800020957700 x28: 1fffe0001b8ce905 x27: dfff800000000000
x26: dfff800000000000 x25: ffff70000412aee8 x24: ffff0000d53c9800
x23: ffff0000d53c9810 x22: ffff800020957740 x21: 0000000000000000
x20: ffff0000dc51a5fc x19: ffff800017a8a000 x18: ffff800011abbcc0
x17: 0000000000000000 x16: ffff8000082d22e0 x15: 0000000000000002
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000080000
x11: 0000000000007d90 x10: ffff8000339ce000 x9 : 650a76c6b3b6ee00
x8 : 650a76c6b3b6ee00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020957198 x4 : ffff8000151a4820 x3 : ffff80000852e158
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
 get_signal+0x1120/0x1310 kernel/signal.c:2648
 do_signal arch/arm64/kernel/signal.c:1081 [inline]
 do_notify_resume+0x340/0x2b0c arch/arm64/kernel/signal.c:1134
 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: 534
hardirqs last  enabled at (533): [<ffff800008308424>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261
hardirqs last disabled at (534): [<ffff80001195a4d8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (486): [<ffff800010af6e8c>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (486): [<ffff800010af6e8c>] ax25_cb_del+0x14c/0x198 net/ax25/af_ax25.c:70
softirqs last disabled at (484): [<ffff800010af6d70>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (484): [<ffff800010af6d70>] ax25_cb_del+0x30/0x198 net/ax25/af_ax25.c:65
---[ end trace 0000000000000000 ]---