------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 13767 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Modules linked in: CPU: 0 UID: 0 PID: 13767 Comm: syz.1.2335 Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Code: b2 00 00 00 e8 d7 2e cc fc 5b 5d c3 cc cc cc cc e8 cb 2e cc fc c6 05 38 7b 31 0b 01 90 48 c7 c7 80 b5 80 8c e8 87 e9 8b fc 90 <0f> 0b 90 90 eb d9 e8 ab 2e cc fc c6 05 15 7b 31 0b 01 90 48 c7 c7 RSP: 0018:ffffc9000400fb68 EFLAGS: 00010246 RAX: 1163dca8fa25ce00 RBX: ffff888032c6464c RCX: ffff88805f23bc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000004 R08: ffffffff8181ae52 R09: fffffbfff1d3a69c R10: dffffc0000000000 R11: fffffbfff1d3a69c R12: ffff888032c64608 R13: 0000000000000000 R14: ffff888032c6464c R15: dffffc0000000000 FS: 000055558ac4f500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30616ff8 CR3: 000000005a1ea000 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:4331 [inline] netdev_put include/linux/netdevice.h:4348 [inline] ax25_release+0x368/0x960 net/ax25/af_ax25.c:1080 __sock_release net/socket.c:647 [inline] sock_close+0xbc/0x240 net/socket.c:1389 __fput+0x3e9/0x9f0 fs/file_table.c:464 task_work_run+0x24f/0x310 kernel/task_work.c:227 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: 0033:0x7fdd1ff8d169 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:00007ffc39d0d138 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fdd201a7ba0 RCX: 00007fdd1ff8d169 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fdd201a7ba0 R08: 0000000000007b24 R09: 0000000739d0d42f R10: 00000000005f6704 R11: 0000000000000246 R12: 000000000004ffca R13: 00007fdd201a6080 R14: ffffffffffffffff R15: 00007ffc39d0d250