------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 1 PID: 25 at lib/refcount.c:28 refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28 Modules linked in: CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28 Code: ff 89 de e8 78 ad 00 fd 84 db 0f 85 66 ff ff ff e8 8b ab 00 fd c6 05 a4 ed 6c 0b 01 90 48 c7 c7 40 25 b1 8b e8 b7 71 c1 fc 90 <0f> 0b 90 90 e9 43 ff ff ff e8 68 ab 00 fd 0f b6 1d 7f ed 6c 0b 31 RSP: 0018:ffffc900001f7b40 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815a1729 RDX: ffff88801d2f9e00 RSI: ffffffff815a1736 RDI: 0000000000000001 RBP: ffff888026456044 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888026456000 R13: ffff888026456044 R14: ffff8880282a3000 R15: ffff8880282a3088 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c39df04 CR3: 0000000029176000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_sub_and_test include/linux/refcount.h:275 [inline] __refcount_dec_and_test include/linux/refcount.h:307 [inline] refcount_dec_and_test include/linux/refcount.h:325 [inline] neigh_parms_put net/core/neighbour.c:839 [inline] neigh_destroy+0x45a/0x630 net/core/neighbour.c:871 neigh_release include/net/neighbour.h:442 [inline] neigh_cleanup_and_release net/core/neighbour.c:121 [inline] neigh_periodic_work+0x743/0xcb0 net/core/neighbour.c:959 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244