------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 11679 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 11679 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00722-gbb678f01804c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31 Code: b2 00 00 00 e8 e7 ac e6 fc 5b 5d c3 cc cc cc cc e8 db ac e6 fc c6 05 4e 66 e8 0a 01 90 48 c7 c7 20 a5 1f 8c e8 47 db a8 fc 90 <0f> 0b 90 90 eb d9 e8 bb ac e6 fc c6 05 2b 66 e8 0a 01 90 48 c7 c7 RSP: 0018:ffffc90012c47b68 EFLAGS: 00010246 RAX: 7791852425e3d100 RBX: ffff88802a44a664 RCX: ffff888022693c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000004 R08: ffffffff815857a2 R09: 1ffff1101728519a R10: dffffc0000000000 R11: ffffed101728519b R12: ffff88802a44a620 R13: 0000000000000000 R14: ffff88802a44a664 R15: dffffc0000000000 FS: 00005555647c5480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb3a73cd440 CR3: 00000000550a0000 CR4: 00000000003506f0 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:4058 [inline] netdev_put include/linux/netdevice.h:4075 [inline] ax25_release+0x368/0x950 net/ax25/af_ax25.c:1069 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe5e07cea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc690834b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fbe5e1b5980 RCX: 00007fbe5e07cea9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fbe5e1b5980 R08: 000000008136572d R09: 0000001d00000000 R10: 0000001b33620000 R11: 0000000000000246 R12: 0000000000039768 R13: 00007fbe5e1b405c R14: 0000000000000032 R15: 00007fbe5e1b5980