[ 20.024990][ T294] ==================================================================
[ 20.025317][ T294] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 20.025603][ T294] Read of size 1 at addr ffff8880091416c4 by task ip/294
[ 20.025805][ T294]
[ 20.025896][ T294] CPU: 0 UID: 0 PID: 294 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.025901][ T294] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.025903][ T294] Call Trace:
[ 20.025905][ T294]
[ 20.025907][ T294] dump_stack_lvl+0x82/0xc0
[ 20.025912][ T294] print_address_description.constprop.0+0x2c/0x3a0
[ 20.025919][ T294] ? kobject_put+0xbb/0xd0
[ 20.025922][ T294] print_report+0xb4/0x270
[ 20.025926][ T294] ? kobject_put+0xbb/0xd0
[ 20.025929][ T294] ? kasan_addr_to_slab+0x21/0x70
[ 20.025932][ T294] ? kobject_put+0xbb/0xd0
[ 20.025935][ T294] kasan_report+0xca/0x100
[ 20.025939][ T294] ? kobject_put+0xbb/0xd0
[ 20.025945][ T294] kobject_put+0xbb/0xd0
[ 20.025948][ T294] netdev_run_todo+0x5f0/0xc60
[ 20.025954][ T294] ? dev_ingress_queue_create+0x190/0x190
[ 20.025957][ T294] ? generic_xdp_install+0x410/0x410
[ 20.025961][ T294] ? unregister_netdevice_many+0x20/0x20
[ 20.025967][ T294] rtnl_dellink+0x350/0xa30
[ 20.025972][ T294] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 20.025992][ T294] ? find_held_lock+0x2b/0x80
[ 20.025999][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.026004][ T294] ? find_held_lock+0x2b/0x80
[ 20.026008][ T294] ? rtnetlink_rcv_msg+0x6e6/0xc00
[ 20.026011][ T294] ? __lock_release+0x5d/0x170
[ 20.026015][ T294] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 20.026019][ T294] rtnetlink_rcv_msg+0x709/0xc00
[ 20.026023][ T294] ? rtnl_port_fill+0x890/0x890
[ 20.026026][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.026032][ T294] netlink_rcv_skb+0x121/0x340
[ 20.026036][ T294] ? rtnl_port_fill+0x890/0x890
[ 20.026040][ T294] ? netlink_ack+0xdf0/0xdf0
[ 20.026047][ T294] ? netlink_deliver_tap+0x13e/0x340
[ 20.026049][ T294] ? netlink_deliver_tap+0xc3/0x340
[ 20.026053][ T294] netlink_unicast+0x4aa/0x780
[ 20.026057][ T294] ? netlink_attachskb+0x810/0x810
[ 20.026060][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.026068][ T294] netlink_sendmsg+0x714/0xbd0
[ 20.026075][ T294] ? netlink_unicast+0x780/0x780
[ 20.026080][ T294] ? __import_iovec+0x230/0x3b0
[ 20.026087][ T294] ? netlink_unicast+0x780/0x780
[ 20.026093][ T294] ____sys_sendmsg+0x3dd/0x890
[ 20.026100][ T294] ? get_timestamp.constprop.0+0x370/0x370
[ 20.026104][ T294] ? __copy_msghdr+0x3c0/0x3c0
[ 20.026118][ T294] ___sys_sendmsg+0xed/0x170
[ 20.026122][ T294] ? kasan_record_aux_stack+0x8c/0xa0
[ 20.026128][ T294] ? __call_rcu_common.constprop.0+0xa8/0x630
[ 20.026135][ T294] ? copy_msghdr_from_user+0x110/0x110
[ 20.026144][ T294] ? find_held_lock+0x2b/0x80
[ 20.026151][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.026161][ T294] ? find_held_lock+0x2b/0x80
[ 20.026167][ T294] ? __virt_addr_valid+0x22a/0x450
[ 20.026175][ T294] ? __lock_release+0x5d/0x170
[ 20.026185][ T294] __sys_sendmsg+0x10b/0x1a0
[ 20.026189][ T294] ? __call_rcu_common.constprop.0+0x318/0x630
[ 20.026194][ T294] ? __sys_sendmsg_sock+0x20/0x20
[ 20.026208][ T294] ? rcu_is_watching+0x12/0xb0
[ 20.026218][ T294] do_syscall_64+0xc1/0xfd0
[ 20.026226][ T294] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.026231][ T294] RIP: 0033:0x7f15c5f021d7
[ 20.026238][ T294] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[ 20.026243][ T294] RSP: 002b:00007ffecf40beb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 20.026249][ T294] RAX: ffffffffffffffda RBX: 00007ffecf40c5f0 RCX: 00007f15c5f021d7
[ 20.026253][ T294] RDX: 0000000000000000 RSI: 00007ffecf40bf20 RDI: 0000000000000005
[ 20.026256][ T294] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[ 20.026259][ T294] R10: 00007f15c5dfe510 R11: 0000000000000246 R12: 0000000000000001
[ 20.026262][ T294] R13: 00000000690df855 R14: 0000000000499600 R15: 0000000000000000
[ 20.026274][ T294]
[ 20.026276][ T294]
[ 20.040470][ T294] Allocated by task 273:
[ 20.040594][ T294] kasan_save_stack+0x24/0x40
[ 20.040797][ T294] kasan_save_track+0x14/0x30
[ 20.041021][ T294] __kasan_kmalloc+0x7b/0x90
[ 20.041285][ T294] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 20.041465][ T294] alloc_netdev_mqs+0x7d/0x1370
[ 20.041665][ T294] rtnl_create_link+0xa9e/0xe20
[ 20.041840][ T294] rtnl_newlink_create+0x203/0x8f0
[ 20.042011][ T294] __rtnl_newlink+0x231/0xa30
[ 20.042197][ T294] rtnl_newlink+0x693/0xa60
[ 20.042369][ T294] rtnetlink_rcv_msg+0x709/0xc00
[ 20.042552][ T294] netlink_rcv_skb+0x121/0x340
[ 20.042727][ T294] netlink_unicast+0x4aa/0x780
[ 20.042898][ T294] netlink_sendmsg+0x714/0xbd0
[ 20.043179][ T294] ____sys_sendmsg+0x3dd/0x890
[ 20.043355][ T294] ___sys_sendmsg+0xed/0x170
[ 20.043533][ T294] __sys_sendmsg+0x10b/0x1a0
[ 20.043707][ T294] do_syscall_64+0xc1/0xfd0
[ 20.043974][ T294] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.044207][ T294]
[ 20.044296][ T294] Freed by task 294:
[ 20.044419][ T294] kasan_save_stack+0x24/0x40
[ 20.044593][ T294] kasan_save_track+0x14/0x30
[ 20.044857][ T294] __kasan_save_free_info+0x3b/0x60
[ 20.045030][ T294] __kasan_slab_free+0x3f/0x60
[ 20.045236][ T294] kfree+0x21d/0x540
[ 20.045359][ T294] device_release+0x9c/0x210
[ 20.045621][ T294] kobject_cleanup+0xfe/0x360
[ 20.045838][ T294] netdev_run_todo+0x81f/0xc60
[ 20.046001][ T294] rtnl_dellink+0x350/0xa30
[ 20.046169][ T294] rtnetlink_rcv_msg+0x709/0xc00
[ 20.046429][ T294] netlink_rcv_skb+0x121/0x340
[ 20.046587][ T294] netlink_unicast+0x4aa/0x780
[ 20.046747][ T294] netlink_sendmsg+0x714/0xbd0
[ 20.046904][ T294] ____sys_sendmsg+0x3dd/0x890
[ 20.047267][ T294] ___sys_sendmsg+0xed/0x170
[ 20.047482][ T294] __sys_sendmsg+0x10b/0x1a0
[ 20.047659][ T294] do_syscall_64+0xc1/0xfd0
[ 20.047836][ T294] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.048160][ T294]
[ 20.048251][ T294] The buggy address belongs to the object at ffff888009141000
[ 20.048251][ T294] which belongs to the cache kmalloc-4k of size 4096
[ 20.048674][ T294] The buggy address is located 1732 bytes inside of
[ 20.048674][ T294] freed 4096-byte region [ffff888009141000, ffff888009142000)
[ 20.049204][ T294]
[ 20.049293][ T294] The buggy address belongs to the physical page:
[ 20.049509][ T294] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9140
[ 20.049923][ T294] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 20.050205][ T294] flags: 0x80000000000040(head|node=0|zone=1)
[ 20.050585][ T294] page_type: f5(slab)
[ 20.050755][ T294] raw: 0080000000000040 ffff888001043700 ffffea000030ce10 ffffea00003b8010
[ 20.051074][ T294] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.051493][ T294] head: 0080000000000040 ffff888001043700 ffffea000030ce10 ffffea00003b8010
[ 20.051886][ T294] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.052318][ T294] head: 0080000000000003 ffffea0000245001 00000000ffffffff 00000000ffffffff
[ 20.052634][ T294] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 20.052919][ T294] page dumped because: kasan: bad access detected
[ 20.053230][ T294]
[ 20.053315][ T294] Memory state around the buggy address:
[ 20.053470][ T294] ffff888009141580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.053705][ T294] ffff888009141600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.054035][ T294] >ffff888009141680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.054278][ T294] ^
[ 20.054651][ T294] ffff888009141700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.054898][ T294] ffff888009141780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.055148][ T294] ==================================================================
[ 20.055577][ T294] Disabling lock debugging due to kernel taint
[ 20.055779][ T294] ------------[ cut here ]------------
[ 20.056010][ T294] refcount_t: underflow; use-after-free.
[ 20.056243][ T294] WARNING: CPU: 0 PID: 294 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.056611][ T294] Modules linked in:
[ 20.056742][ T294] CPU: 0 UID: 0 PID: 294 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.057152][ T294] Tainted: [B]=BAD_PAGE
[ 20.057370][ T294] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.057567][ T294] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.057777][ T294] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba 05 93 e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
[ 20.058626][ T294] RSP: 0018:ffffc90000d471f0 EFLAGS: 00010286
[ 20.058867][ T294] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.059287][ T294] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.059549][ T294] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2800934
[ 20.059816][ T294] R10: 0000000000000003 R11: ffffc90000d46d80 R12: 0000000000000001
[ 20.060264][ T294] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.060564][ T294] FS: 00007f15c5d34800(0000) GS:ffff8880d7b08000(0000) knlGS:0000000000000000
[ 20.060987][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.061247][ T294] CR2: 00000000004e55a0 CR3: 000000000b0ee006 CR4: 0000000000772ef0
[ 20.061491][ T294] PKRU: 55555554
[ 20.061716][ T294] Call Trace:
[ 20.061864][ T294]
[ 20.061950][ T294] netdev_run_todo+0x5f0/0xc60
[ 20.062210][ T294] ? dev_ingress_queue_create+0x190/0x190
[ 20.062456][ T294] ? generic_xdp_install+0x410/0x410
[ 20.062755][ T294] ? unregister_netdevice_many+0x20/0x20
[ 20.062913][ T294] rtnl_dellink+0x350/0xa30
[ 20.063149][ T294] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 20.063410][ T294] ? find_held_lock+0x2b/0x80
[ 20.063717][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.063911][ T294] ? find_held_lock+0x2b/0x80
[ 20.064099][ T294] ? rtnetlink_rcv_msg+0x6e6/0xc00
[ 20.064309][ T294] ? __lock_release+0x5d/0x170
[ 20.064627][ T294] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 20.064865][ T294] rtnetlink_rcv_msg+0x709/0xc00
[ 20.065038][ T294] ? rtnl_port_fill+0x890/0x890
[ 20.065407][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.065608][ T294] netlink_rcv_skb+0x121/0x340
[ 20.065775][ T294] ? rtnl_port_fill+0x890/0x890
[ 20.065981][ T294] ? netlink_ack+0xdf0/0xdf0
[ 20.066316][ T294] ? netlink_deliver_tap+0x13e/0x340
[ 20.066523][ T294] ? netlink_deliver_tap+0xc3/0x340
[ 20.066696][ T294] netlink_unicast+0x4aa/0x780
[ 20.066889][ T294] ? netlink_attachskb+0x810/0x810
[ 20.067099][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.067268][ T294] netlink_sendmsg+0x714/0xbd0
[ 20.067471][ T294] ? netlink_unicast+0x780/0x780
[ 20.067642][ T294] ? __import_iovec+0x230/0x3b0
[ 20.067827][ T294] ? netlink_unicast+0x780/0x780
[ 20.068159][ T294] ____sys_sendmsg+0x3dd/0x890
[ 20.068370][ T294] ? get_timestamp.constprop.0+0x370/0x370
[ 20.068598][ T294] ? __copy_msghdr+0x3c0/0x3c0
[ 20.068908][ T294] ___sys_sendmsg+0xed/0x170
[ 20.069096][ T294] ? kasan_record_aux_stack+0x8c/0xa0
[ 20.069265][ T294] ? __call_rcu_common.constprop.0+0xa8/0x630
[ 20.069462][ T294] ? copy_msghdr_from_user+0x110/0x110
[ 20.069760][ T294] ? find_held_lock+0x2b/0x80
[ 20.069923][ T294] ? __lock_acquire+0x449/0x7e0
[ 20.070153][ T294] ? find_held_lock+0x2b/0x80
[ 20.070360][ T294] ? __virt_addr_valid+0x22a/0x450
[ 20.070629][ T294] ? __lock_release+0x5d/0x170
[ 20.070825][ T294] __sys_sendmsg+0x10b/0x1a0
[ 20.070990][ T294] ? __call_rcu_common.constprop.0+0x318/0x630
[ 20.071280][ T294] ? __sys_sendmsg_sock+0x20/0x20
[ 20.071669][ T294] ? rcu_is_watching+0x12/0xb0
[ 20.071830][ T294] do_syscall_64+0xc1/0xfd0
[ 20.071997][ T294] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.072312][ T294] RIP: 0033:0x7f15c5f021d7
[ 20.072485][ T294] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[ 20.073365][ T294] RSP: 002b:00007ffecf40beb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 20.073603][ T294] RAX: ffffffffffffffda RBX: 00007ffecf40c5f0 RCX: 00007f15c5f021d7
[ 20.073882][ T294] RDX: 0000000000000000 RSI: 00007ffecf40bf20 RDI: 0000000000000005
[ 20.074288][ T294] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[ 20.074584][ T294] R10: 00007f15c5dfe510 R11: 0000000000000246 R12: 0000000000000001
[ 20.074824][ T294] R13: 00000000690df855 R14: 0000000000499600 R15: 0000000000000000
[ 20.075270][ T294]
[ 20.075393][ T294] irq event stamp: 53473
[ 20.075511][ T294] hardirqs last enabled at (53473): [] irqentry_exit+0x3b/0x80
[ 20.075883][ T294] hardirqs last disabled at (53472): [] handle_softirqs+0x47f/0x610
[ 20.076176][ T294] softirqs last enabled at (53342): [] handle_softirqs+0x352/0x610
[ 20.076655][ T294] softirqs last disabled at (53333): [] irq_exit_rcu+0xab/0x100
[ 20.076974][ T294] ---[ end trace 0000000000000000 ]---