syzbot

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refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 5231 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Modules linked in:
CPU: 0 UID: 0 PID: 5231 Comm: syz-executor234 Not tainted 6.12.0-rc3-syzkaller-00164-g34d35b4edbbe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Code: b2 00 00 00 e8 f7 12 d8 fc 5b 5d c3 cc cc cc cc e8 eb 12 d8 fc c6 05 8e f0 49 0b 01 90 48 c7 c7 e0 bc 60 8c e8 47 0c 99 fc 90 <0f> 0b 90 90 eb d9 e8 cb 12 d8 fc c6 05 6b f0 49 0b 01 90 48 c7 c7
RSP: 0018:ffffc9000353f9c8 EFLAGS: 00010246
RAX: 1742b9254644b300 RBX: ffff8880315dc664 RCX: ffff888040118000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000004 R08: ffffffff8155e402 R09: fffffbfff1cf9fd8
R10: dffffc0000000000 R11: fffffbfff1cf9fd8 R12: ffff8880315dc620
R13: 0000000000000000 R14: ffff8880315dc664 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f935a7d1110 CR3: 000000002d708000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:336 [inline]
 refcount_dec include/linux/refcount.h:351 [inline]
 ref_tracker_free+0x6af/0x7e0 lib/ref_tracker.c:236
 netdev_tracker_free include/linux/netdevice.h:4082 [inline]
 netdev_put include/linux/netdevice.h:4099 [inline]
 ax25_release+0x368/0x950 net/ax25/af_ax25.c:1069
 __sock_release net/socket.c:658 [inline]
 sock_close+0xbc/0x240 net/socket.c:1426
 __fput+0x23f/0x880 fs/file_table.c:431
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:939
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 __do_sys_exit_group kernel/exit.c:1099 [inline]
 __se_sys_exit_group kernel/exit.c:1097 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f935a755c49
Code: Unable to access opcode bytes at 0x7f935a755c1f.
RSP: 002b:00007fff83fa40b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f935a755c49
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f935a7d02b0 R08: ffffffffffffffb8 R09: 0000000000000006
R10: 00000000200003c0 R11: 0000000000000246 R12: 00007f935a7d02b0
R13: 0000000000000000 R14: 00007f935a7d0d00 R15: 00007f935a726e90
 </TASK>