[ 3.866552] ------------[ cut here ]------------ [ 3.866647] refcount_t: underflow; use-after-free. [ 3.866712] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 3.866788] Modules linked in: [ 3.866824] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 3.866904] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.866950] Workqueue: netns cleanup_net [ 3.866990] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 3.867033] Code: a3 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 55 a3 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 [ 3.867180] RSP: 0018:ffffb1460025fd50 EFLAGS: 00010286 [ 3.867247] RAX: 0000000000000000 RBX: ffffb1460025fd60 RCX: 00000000ffffdfff [ 3.867346] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 3.867426] RBP: ffffb1460025f858 R08: ffffffffa3d5ba28 R09: 00000000ffffdfff [ 3.867491] R10: ffffffffa3c7ba40 R11: ffffffffa3d2ba40 R12: dead000000000122 [ 3.867561] R13: 00000000fffb7ab5 R14: 0000000000000001 R15: ffff99024648a000 [ 3.867625] FS: 0000000000000000(0000) GS:ffff9902da791000(0000) knlGS:0000000000000000 [ 3.867690] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.867751] CR2: 00007f358597f840 CR3: 000000001fc46001 CR4: 0000000000772ef0 [ 3.867817] PKRU: 55555554 [ 3.867847] Call Trace: [ 3.867877] [ 3.867899] netdev_run_todo+0x21a/0x550 [ 3.867947] ops_undo_list+0x1e3/0x1f0 [ 3.867984] cleanup_net+0x1b7/0x300 [ 3.868020] process_one_work+0x162/0x380 [ 3.868058] worker_thread+0x299/0x3c0 [ 3.868094] ? rescuer_thread+0x4c0/0x4c0 [ 3.868135] kthread+0x101/0x1f0 [ 3.868168] ? kthreads_online_cpu+0x110/0x110 [ 3.868219] ? kthreads_online_cpu+0x110/0x110 [ 3.868275] ret_from_fork+0x11c/0x140 [ 3.868317] ? kthreads_online_cpu+0x110/0x110 [ 3.868370] ret_from_fork_asm+0x11/0x20 [ 3.868418] [ 3.868440] ---[ end trace 0000000000000000 ]---