------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 12027 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Modules linked in: CPU: 0 UID: 0 PID: 12027 Comm: syz.3.2071 Not tainted 6.13.0-rc3-syzkaller-00691-gae418e95dd93 #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 37 3b dd fc 5b 5d c3 cc cc cc cc e8 2b 3b dd fc c6 05 4e 2b 42 0b 01 90 48 c7 c7 a0 6a 5f 8c e8 d7 de 9d fc 90 <0f> 0b 90 90 eb d9 e8 0b 3b dd fc c6 05 2b 2b 42 0b 01 90 48 c7 c7 RSP: 0018:ffffc90010557b48 EFLAGS: 00010246 RAX: 3037305fd53e4e00 RBX: ffff88807a9ee64c RCX: ffff888055113c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000004 R08: ffffffff81601a42 R09: fffffbfff1cfa210 R10: dffffc0000000000 R11: fffffbfff1cfa210 R12: ffff88807a9ee608 R13: 0000000000000000 R14: ffff88807a9ee64c R15: dffffc0000000000 FS: 000055555b0e6500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efdd216b7e0 CR3: 000000007ab9e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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:4203 [inline] netdev_put include/linux/netdevice.h:4220 [inline] ax25_release+0x368/0x950 net/ax25/af_ax25.c:1069 __sock_release net/socket.c:640 [inline] sock_close+0xbc/0x240 net/socket.c:1419 __fput+0x23c/0xa50 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd2fd785d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdb7d21f48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fd2fd977ba0 RCX: 00007fd2fd785d29 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fd2fd977ba0 R08: 0000000000000134 R09: 00007ffdb7d2223f R10: 00000000003ffca8 R11: 0000000000000246 R12: 000000000003e9dd R13: 00007fd2fd975fa0 R14: 0000000000000032 R15: ffffffffffffffff