[ 3.021807] ------------[ cut here ]------------ [ 3.021886] refcount_t: underflow; use-after-free. [ 3.021955] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 3.022046] Modules linked in: [ 3.022089] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 3.022183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 3.022250] Workqueue: netns cleanup_net [ 3.022298] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 3.022350] Code: b0 e8 48 df ba ff 90 0f 0b 90 90 c3 80 3d c9 50 ec 00 00 75 89 c6 05 c0 50 ec 00 01 90 48 c7 c7 c8 4a 72 b0 e8 25 df ba ff 90 <0f> 0b 90 90 c3 80 3d a4 50 ec 00 00 0f 85 62 ff ff ff c6 05 97 50 [ 3.022535] RSP: 0000:fffface180257d50 EFLAGS: 00010286 [ 3.022594] RAX: 0000000000000000 RBX: fffface180257d60 RCX: 00000000ffffdfff [ 3.022670] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 3.022749] RBP: fffface180257878 R08: ffffffffb0b5ca28 R09: 00000000ffffdfff [ 3.022836] R10: ffffffffb0a7ca40 R11: ffffffffb0b2ca40 R12: dead000000000122 [ 3.022916] R13: 00000000fffb776d R14: 0000000000000001 R15: ffff9c5a8682f000 [ 3.022998] FS: 0000000000000000(0000) GS:ffff9c5b0d9c0000(0000) knlGS:0000000000000000 [ 3.023083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.023148] CR2: 00007fb23a5d4b00 CR3: 0000000006acf003 CR4: 0000000000772ef0 [ 3.023228] PKRU: 55555554 [ 3.023262] Call Trace: [ 3.023290] [ 3.023314] netdev_run_todo+0x21a/0x550 [ 3.023363] ops_undo_list+0x1e3/0x1f0 [ 3.023410] cleanup_net+0x1b7/0x2b0 [ 3.023449] process_one_work+0x162/0x380 [ 3.023497] worker_thread+0x299/0x3c0 [ 3.023537] ? rescuer_thread+0x4c0/0x4c0 [ 3.023583] kthread+0x101/0x1f0 [ 3.023622] ? kthreads_online_cpu+0x110/0x110 [ 3.023675] ? kthreads_online_cpu+0x110/0x110 [ 3.023727] ret_from_fork+0x11c/0x140 [ 3.023783] ? kthreads_online_cpu+0x110/0x110 [ 3.023845] ret_from_fork_asm+0x11/0x20 [ 3.023895] [ 3.023921] ---[ end trace 0000000000000000 ]--- [ 5.100428] netem: version 1.3