[ 5.382658] ------------[ cut here ]------------ [ 5.382717] refcount_t: underflow; use-after-free. [ 5.382769] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 5.382849] Modules linked in: [ 5.382881] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 5.383628] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 5.383689] Workqueue: netns cleanup_net [ 5.383815] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 5.383942] Code: a1 e8 e8 54 ba ff 90 0f 0b 90 90 c3 80 3d 00 e6 2b 01 00 75 89 c6 05 f7 e5 2b 01 01 90 48 c7 c7 f8 48 95 a1 e8 c5 54 ba ff 90 <0f> 0b 90 90 c3 80 3d db e5 2b 01 00 0f 85 62 ff ff ff c6 05 ce e5 [ 5.384066] RSP: 0018:ffffba3500067d50 EFLAGS: 00010286 [ 5.384106] RAX: 0000000000000000 RBX: ffffba3500067d60 RCX: 00000000ffffdfff [ 5.384164] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 5.384222] RBP: ffffba3500067858 R08: ffffffffa215ba28 R09: 00000000ffffdfff [ 5.384272] R10: ffffffffa207ba40 R11: ffffffffa212ba40 R12: dead000000000122 [ 5.384321] R13: 00000000fffb80a8 R14: 0000000000000001 R15: ffff9a3644db2000 [ 5.384384] FS: 0000000000000000(0000) GS:ffff9a36dc391000(0000) knlGS:0000000000000000 [ 5.384438] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5.384485] CR2: 00007f8c0a6304d8 CR3: 0000000015c46005 CR4: 0000000000772ef0 [ 5.384547] PKRU: 55555554 [ 5.384568] Call Trace: [ 5.384586] [ 5.384612] netdev_run_todo+0x21a/0x550 [ 5.384647] ops_undo_list+0x1e3/0x1f0 [ 5.384681] cleanup_net+0x1b7/0x300 [ 5.384722] process_one_work+0x162/0x380 [ 5.384758] worker_thread+0x299/0x3c0 [ 5.384788] ? rescuer_thread+0x4c0/0x4c0 [ 5.384817] kthread+0x101/0x1f0 [ 5.384848] ? kthreads_online_cpu+0x110/0x110 [ 5.384896] ? kthreads_online_cpu+0x110/0x110 [ 5.384931] ret_from_fork+0x11c/0x140 [ 5.384963] ? kthreads_online_cpu+0x110/0x110 [ 5.385002] ret_from_fork_asm+0x11/0x20 [ 5.385034] [ 5.385057] ---[ end trace 0000000000000000 ]---