[ 1.769839] ------------[ cut here ]------------ [ 1.769904] refcount_t: underflow; use-after-free. [ 1.769960] WARNING: CPU: 3 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.770037] Modules linked in: [ 1.770074] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.770144] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.770198] Workqueue: netns cleanup_net [ 1.770239] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.770282] Code: 96 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 75 96 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 [ 1.770411] RSP: 0018:ffffb8690024fd50 EFLAGS: 00010286 [ 1.770453] RAX: 0000000000000000 RBX: ffffb8690024fd60 RCX: 00000000ffffdfff [ 1.770512] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.770572] RBP: ffffb8690024f858 R08: ffffffff96f5ba28 R09: 00000000ffffdfff [ 1.770626] R10: ffffffff96e7ba40 R11: ffffffff96f2ba40 R12: dead000000000122 [ 1.770687] R13: 00000000fffb728d R14: 0000000000000001 R15: ffff9749433ba000 [ 1.770748] FS: 0000000000000000(0000) GS:ffff9749e7711000(0000) knlGS:0000000000000000 [ 1.770825] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.770878] CR2: 00007f3fb879c4d8 CR3: 0000000010646006 CR4: 0000000000772ef0 [ 1.770938] PKRU: 55555554 [ 1.770962] Call Trace: [ 1.770989] [ 1.771010] netdev_run_todo+0x21a/0x550 [ 1.771049] ops_undo_list+0x1e3/0x1f0 [ 1.771086] cleanup_net+0x1b7/0x300 [ 1.771120] process_one_work+0x162/0x380 [ 1.771161] worker_thread+0x299/0x3c0 [ 1.771195] ? rescuer_thread+0x4c0/0x4c0 [ 1.771230] kthread+0x101/0x1f0 [ 1.771264] ? kthreads_online_cpu+0x110/0x110 [ 1.771308] ? kthreads_online_cpu+0x110/0x110 [ 1.771351] ret_from_fork+0x11c/0x140 [ 1.771391] ? kthreads_online_cpu+0x110/0x110 [ 1.771432] ret_from_fork_asm+0x11/0x20 [ 1.771472] [ 1.771496] ---[ end trace 0000000000000000 ]---