[ 1.950025] ------------[ cut here ]------------ [ 1.950095] refcount_t: underflow; use-after-free. [ 1.950146] WARNING: CPU: 3 PID: 65 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.950219] Modules linked in: [ 1.950254] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.950329] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.950380] Workqueue: netns cleanup_net [ 1.950419] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.950462] Code: 9e 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 b5 9e 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 [ 1.950594] RSP: 0018:ffffbcc2c0247d50 EFLAGS: 00010286 [ 1.950636] RAX: 0000000000000000 RBX: ffffbcc2c0247d60 RCX: 00000000ffffdfff [ 1.950697] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.950757] RBP: ffffbcc2c0247858 R08: ffffffff9f35ba28 R09: 00000000ffffdfff [ 1.950810] R10: ffffffff9f27ba40 R11: ffffffff9f32ba40 R12: dead000000000122 [ 1.950862] R13: 00000000fffb7341 R14: 0000000000000001 R15: ffff94f3c4317000 [ 1.950931] FS: 0000000000000000(0000) GS:ffff94f45f311000(0000) knlGS:0000000000000000 [ 1.950998] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.951048] CR2: 00007f22beab3fd0 CR3: 0000000001b3e001 CR4: 0000000000772ef0 [ 1.951103] PKRU: 55555554 [ 1.951127] Call Trace: [ 1.951147] [ 1.951171] netdev_run_todo+0x21a/0x550 [ 1.951206] ops_undo_list+0x1e3/0x1f0 [ 1.951238] cleanup_net+0x1b7/0x300 [ 1.951272] process_one_work+0x162/0x380 [ 1.951313] worker_thread+0x299/0x3c0 [ 1.951345] ? rescuer_thread+0x4c0/0x4c0 [ 1.951378] kthread+0x101/0x1f0 [ 1.951412] ? kthreads_online_cpu+0x110/0x110 [ 1.951455] ? kthreads_online_cpu+0x110/0x110 [ 1.951498] ret_from_fork+0x11c/0x140 [ 1.951535] ? kthreads_online_cpu+0x110/0x110 [ 1.951580] ret_from_fork_asm+0x11/0x20 [ 1.951617] [ 1.951643] ---[ end trace 0000000000000000 ]---