[ 2.771982] ------------[ cut here ]------------ [ 2.772068] refcount_t: underflow; use-after-free. [ 2.772152] WARNING: CPU: 0 PID: 304 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.772306] Modules linked in: [ 2.772352] CPU: 0 UID: 0 PID: 304 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.772428] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.772484] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.772537] Code: 93 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 d5 93 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 [ 2.772686] RSP: 0018:ffffb50a0066f8e0 EFLAGS: 00010286 [ 2.772729] RAX: 0000000000000000 RBX: ffffb50a0066f8f0 RCX: 00000000ffffdfff [ 2.772790] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.772847] RBP: ffffb50a0066f3e8 R08: ffffffff9455ba28 R09: 00000000ffffdfff [ 2.772912] R10: ffffffff9447ba40 R11: ffffffff9452ba40 R12: dead000000000122 [ 2.772997] R13: 00000000fffb7671 R14: 0000000000000001 R15: ffff903282fc6000 [ 2.773060] FS: 00007fa5f5312800(0000) GS:ffff903329f91000(0000) knlGS:0000000000000000 [ 2.773124] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.773203] CR2: 00007ffe5c0a5940 CR3: 000000000445f004 CR4: 0000000000772ef0 [ 2.773271] PKRU: 55555554 [ 2.773297] Call Trace: [ 2.773329] [ 2.773354] netdev_run_todo+0x21a/0x550 [ 2.773395] rtnl_newlink+0x5a9/0xc00 [ 2.773434] ? rtnl_setlink+0x2c0/0x2c0 [ 2.773481] rtnetlink_rcv_msg+0x358/0x400 [ 2.773515] ? get_page_from_freelist+0x2b6/0x1770 [ 2.773562] ? rtnl_calcit.isra.0+0x110/0x110 [ 2.773626] netlink_rcv_skb+0x57/0x100 [ 2.773669] netlink_unicast+0x252/0x380 [ 2.773713] ? __alloc_skb+0xdb/0x190 [ 2.773760] netlink_sendmsg+0x1be/0x3e0 [ 2.773794] ____sys_sendmsg+0x132/0x260 [ 2.773833] ? copy_msghdr_from_user+0x6c/0xa0 [ 2.773886] ___sys_sendmsg+0x87/0xd0 [ 2.773921] ? do_filp_open+0xc1/0x170 [ 2.773979] ? kmem_cache_alloc_noprof+0x393/0x4a0 [ 2.774042] __sys_sendmsg+0x71/0xd0 [ 2.774088] do_syscall_64+0xa4/0xfd0 [ 2.774145] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.774204] RIP: 0033:0x7fa5f54e01d7 [ 2.774247] Code: Unable to access opcode bytes at 0x7fa5f54e01ad. [ 2.774301] RSP: 002b:00007ffe5c0a9418 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 2.774360] RAX: ffffffffffffffda RBX: 00007ffe5c0a9b40 RCX: 00007fa5f54e01d7 [ 2.774422] RDX: 0000000000000000 RSI: 00007ffe5c0a9480 RDI: 0000000000000005 [ 2.774498] RBP: 0000000000000002 R08: 0000000000000044 R09: 0000000000000000 [ 2.774559] R10: 00007fa5f53d7770 R11: 0000000000000246 R12: 00007ffe5c0a9b58 [ 2.774618] R13: 00000000690deb54 R14: 0000000000499600 R15: 00007ffe5c0a9568 [ 2.774683] [ 2.774705] ---[ end trace 0000000000000000 ]---