[ 17.383038][ T277] 8021q: 802.1Q VLAN Support v1.8 [ 37.042764][ T443] ip (443) used greatest stack depth: 24160 bytes left [ 42.417104][ T515] ================================================================== [ 42.417443][ T515] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 42.417739][ T515] Read of size 1 at addr ffff8880084916ac by task ip/515 [ 42.417952][ T515] [ 42.418044][ T515] CPU: 1 UID: 0 PID: 515 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 42.418050][ T515] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.418052][ T515] Call Trace: [ 42.418055][ T515] [ 42.418056][ T515] dump_stack_lvl+0x82/0xc0 [ 42.418063][ T515] print_address_description.constprop.0+0x2c/0x3a0 [ 42.418070][ T515] ? kobject_put+0xbb/0xd0 [ 42.418074][ T515] print_report+0xb4/0x270 [ 42.418077][ T515] ? kobject_put+0xbb/0xd0 [ 42.418080][ T515] ? kasan_addr_to_slab+0x21/0x70 [ 42.418084][ T515] ? kobject_put+0xbb/0xd0 [ 42.418087][ T515] kasan_report+0xca/0x100 [ 42.418090][ T515] ? kobject_put+0xbb/0xd0 [ 42.418096][ T515] kobject_put+0xbb/0xd0 [ 42.418099][ T515] netdev_run_todo+0x5f0/0xc60 [ 42.418105][ T515] ? dev_ingress_queue_create+0x190/0x190 [ 42.418109][ T515] ? generic_xdp_install+0x410/0x410 [ 42.418113][ T515] ? lockdep_hardirqs_on+0x7c/0x110 [ 42.418120][ T515] rtnl_dellink+0x350/0xa30 [ 42.418126][ T515] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.418145][ T515] ? find_held_lock+0x2b/0x80 [ 42.418153][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.418160][ T515] ? find_held_lock+0x2b/0x80 [ 42.418164][ T515] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 42.418166][ T515] ? __lock_release+0x5d/0x170 [ 42.418171][ T515] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.418174][ T515] rtnetlink_rcv_msg+0x709/0xc00 [ 42.418178][ T515] ? rtnl_port_fill+0x850/0x850 [ 42.418181][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.418188][ T515] netlink_rcv_skb+0x121/0x340 [ 42.418193][ T515] ? rtnl_port_fill+0x850/0x850 [ 42.418197][ T515] ? netlink_ack+0xdd0/0xdd0 [ 42.418207][ T515] ? netlink_deliver_tap+0x13e/0x340 [ 42.418211][ T515] ? netlink_deliver_tap+0xc3/0x340 [ 42.418218][ T515] netlink_unicast+0x4aa/0x780 [ 42.418224][ T515] ? netlink_attachskb+0x810/0x810 [ 42.418228][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.418234][ T515] netlink_sendmsg+0x714/0xbd0 [ 42.418238][ T515] ? netlink_unicast+0x780/0x780 [ 42.418242][ T515] ? __import_iovec+0x230/0x3b0 [ 42.418250][ T515] ? netlink_unicast+0x780/0x780 [ 42.418253][ T515] ____sys_sendmsg+0x3dd/0x890 [ 42.418259][ T515] ? get_timestamp.constprop.0+0x380/0x380 [ 42.418262][ T515] ? __copy_msghdr+0x3c0/0x3c0 [ 42.418269][ T515] ___sys_sendmsg+0xed/0x170 [ 42.418272][ T515] ? kasan_record_aux_stack+0x8c/0xa0 [ 42.418275][ T515] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 42.418281][ T515] ? copy_msghdr_from_user+0x110/0x110 [ 42.418286][ T515] ? find_held_lock+0x2b/0x80 [ 42.418290][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.418296][ T515] ? find_held_lock+0x2b/0x80 [ 42.418300][ T515] ? __virt_addr_valid+0x22a/0x450 [ 42.418305][ T515] ? __lock_release+0x5d/0x170 [ 42.418311][ T515] __sys_sendmsg+0x10b/0x1a0 [ 42.418315][ T515] ? __call_rcu_common.constprop.0+0x318/0x630 [ 42.418318][ T515] ? __sys_sendmsg_sock+0x20/0x20 [ 42.418326][ T515] ? rcu_is_watching+0x12/0xb0 [ 42.418330][ T515] do_syscall_64+0xc1/0xfd0 [ 42.418335][ T515] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.418340][ T515] RIP: 0033:0x7fc34604c1d7 [ 42.418346][ T515] 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 [ 42.418349][ T515] RSP: 002b:00007ffc183d0588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.418354][ T515] RAX: ffffffffffffffda RBX: 00007ffc183d0cb0 RCX: 00007fc34604c1d7 [ 42.418356][ T515] RDX: 0000000000000000 RSI: 00007ffc183d05f0 RDI: 0000000000000005 [ 42.418357][ T515] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.418359][ T515] R10: 00007fc345f48f60 R11: 0000000000000246 R12: 0000000000000002 [ 42.418360][ T515] R13: 00000000690dfa6d R14: 0000000000499600 R15: 0000000000000000 [ 42.418367][ T515] [ 42.418368][ T515] [ 42.431520][ T515] Allocated by task 284: [ 42.431655][ T515] kasan_save_stack+0x24/0x40 [ 42.431843][ T515] kasan_save_track+0x14/0x30 [ 42.432015][ T515] __kasan_kmalloc+0x7b/0x90 [ 42.432192][ T515] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 42.432381][ T515] alloc_netdev_mqs+0x7d/0x1370 [ 42.432562][ T515] rtnl_create_link+0xa9e/0xe20 [ 42.432736][ T515] rtnl_newlink_create+0x203/0x770 [ 42.432921][ T515] __rtnl_newlink+0x231/0xa30 [ 42.433096][ T515] rtnl_newlink+0x693/0xa60 [ 42.433284][ T515] rtnetlink_rcv_msg+0x709/0xc00 [ 42.433459][ T515] netlink_rcv_skb+0x121/0x340 [ 42.433636][ T515] netlink_unicast+0x4aa/0x780 [ 42.433812][ T515] netlink_sendmsg+0x714/0xbd0 [ 42.433989][ T515] ____sys_sendmsg+0x3dd/0x890 [ 42.434166][ T515] ___sys_sendmsg+0xed/0x170 [ 42.434359][ T515] __sys_sendmsg+0x10b/0x1a0 [ 42.434544][ T515] do_syscall_64+0xc1/0xfd0 [ 42.434725][ T515] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.434942][ T515] [ 42.435033][ T515] Freed by task 515: [ 42.435166][ T515] kasan_save_stack+0x24/0x40 [ 42.435351][ T515] kasan_save_track+0x14/0x30 [ 42.435524][ T515] __kasan_save_free_info+0x3b/0x60 [ 42.435705][ T515] __kasan_slab_free+0x3f/0x60 [ 42.435882][ T515] kfree+0x21d/0x540 [ 42.436017][ T515] device_release+0x9c/0x210 [ 42.436200][ T515] kobject_cleanup+0xfe/0x360 [ 42.436380][ T515] netdev_run_todo+0x81f/0xc60 [ 42.436556][ T515] rtnl_dellink+0x350/0xa30 [ 42.436731][ T515] rtnetlink_rcv_msg+0x709/0xc00 [ 42.436900][ T515] netlink_rcv_skb+0x121/0x340 [ 42.437073][ T515] netlink_unicast+0x4aa/0x780 [ 42.437261][ T515] netlink_sendmsg+0x714/0xbd0 [ 42.437437][ T515] ____sys_sendmsg+0x3dd/0x890 [ 42.437603][ T515] ___sys_sendmsg+0xed/0x170 [ 42.437763][ T515] __sys_sendmsg+0x10b/0x1a0 [ 42.437932][ T515] do_syscall_64+0xc1/0xfd0 [ 42.438107][ T515] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.438334][ T515] [ 42.438427][ T515] The buggy address belongs to the object at ffff888008491000 [ 42.438427][ T515] which belongs to the cache kmalloc-4k of size 4096 [ 42.438870][ T515] The buggy address is located 1708 bytes inside of [ 42.438870][ T515] freed 4096-byte region [ffff888008491000, ffff888008492000) [ 42.439305][ T515] [ 42.439398][ T515] The buggy address belongs to the physical page: [ 42.439624][ T515] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8490 [ 42.440048][ T515] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 42.440321][ T515] flags: 0x80000000000040(head|node=0|zone=1) [ 42.440548][ T515] page_type: f5(slab) [ 42.440694][ T515] raw: 0080000000000040 ffff888001043700 ffffea000029b810 ffffea00001bce10 [ 42.441122][ T515] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 42.441470][ T515] head: 0080000000000040 ffff888001043700 ffffea000029b810 ffffea00001bce10 [ 42.441897][ T515] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 42.442220][ T515] head: 0080000000000003 ffffea0000212401 00000000ffffffff 00000000ffffffff [ 42.442655][ T515] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 42.442973][ T515] page dumped because: kasan: bad access detected [ 42.443191][ T515] [ 42.443377][ T515] Memory state around the buggy address: [ 42.443551][ T515] ffff888008491580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.443808][ T515] ffff888008491600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.444159][ T515] >ffff888008491680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.444429][ T515] ^ [ 42.444600][ T515] ffff888008491700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.444945][ T515] ffff888008491780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.445201][ T515] ================================================================== [ 42.445664][ T515] Disabling lock debugging due to kernel taint [ 42.446109][ T515] ------------[ cut here ]------------ [ 42.446410][ T515] refcount_t: underflow; use-after-free. [ 42.446732][ T515] WARNING: CPU: 0 PID: 515 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 42.447239][ T515] Modules linked in: 8021q vrf veth [ 42.447594][ T515] CPU: 0 UID: 0 PID: 515 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 42.448218][ T515] Tainted: [B]=BAD_PAGE [ 42.448466][ T515] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.448851][ T515] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 42.449258][ T515] Code: 7d 93 02 80 fb 01 0f 87 bb 99 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 a8 7d 93 02 01 90 48 c7 c7 60 8d a5 91 e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff [ 42.450409][ T515] RSP: 0018:ffffc90000d671f0 EFLAGS: 00010286 [ 42.450798][ T515] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 42.451253][ T515] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 42.451751][ T515] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff247e134 [ 42.452203][ T515] R10: 0000000000000003 R11: ffffc90000d66d80 R12: 0000000000000001 [ 42.452682][ T515] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 42.453140][ T515] FS: 00007fc345e7e800(0000) GS:ffff8880a29f2000(0000) knlGS:0000000000000000 [ 42.453685][ T515] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.454063][ T515] CR2: 00007fa85bf1f658 CR3: 000000000bc3a004 CR4: 0000000000772ef0 [ 42.454519][ T515] PKRU: 55555554 [ 42.454743][ T515] Call Trace: [ 42.454977][ T515] [ 42.455128][ T515] netdev_run_todo+0x5f0/0xc60 [ 42.455446][ T515] ? dev_ingress_queue_create+0x190/0x190 [ 42.455754][ T515] ? generic_xdp_install+0x410/0x410 [ 42.456062][ T515] ? lockdep_hardirqs_on+0x7c/0x110 [ 42.456386][ T515] rtnl_dellink+0x350/0xa30 [ 42.456707][ T515] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.457108][ T515] ? find_held_lock+0x2b/0x80 [ 42.457435][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.457741][ T515] ? find_held_lock+0x2b/0x80 [ 42.458054][ T515] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 42.458387][ T515] ? __lock_release+0x5d/0x170 [ 42.458701][ T515] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.459097][ T515] rtnetlink_rcv_msg+0x709/0xc00 [ 42.459423][ T515] ? rtnl_port_fill+0x850/0x850 [ 42.459735][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.460060][ T515] netlink_rcv_skb+0x121/0x340 [ 42.460382][ T515] ? rtnl_port_fill+0x850/0x850 [ 42.460686][ T515] ? netlink_ack+0xdd0/0xdd0 [ 42.460996][ T515] ? netlink_deliver_tap+0x13e/0x340 [ 42.461295][ T515] ? netlink_deliver_tap+0xc3/0x340 [ 42.461632][ T515] netlink_unicast+0x4aa/0x780 [ 42.461944][ T515] ? netlink_attachskb+0x810/0x810 [ 42.462253][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.462580][ T515] netlink_sendmsg+0x714/0xbd0 [ 42.462888][ T515] ? netlink_unicast+0x780/0x780 [ 42.463200][ T515] ? __import_iovec+0x230/0x3b0 [ 42.463528][ T515] ? netlink_unicast+0x780/0x780 [ 42.463848][ T515] ____sys_sendmsg+0x3dd/0x890 [ 42.464173][ T515] ? get_timestamp.constprop.0+0x380/0x380 [ 42.464567][ T515] ? __copy_msghdr+0x3c0/0x3c0 [ 42.464871][ T515] ___sys_sendmsg+0xed/0x170 [ 42.465163][ T515] ? kasan_record_aux_stack+0x8c/0xa0 [ 42.465455][ T515] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 42.465815][ T515] ? copy_msghdr_from_user+0x110/0x110 [ 42.466113][ T515] ? find_held_lock+0x2b/0x80 [ 42.466436][ T515] ? __lock_acquire+0x449/0x7e0 [ 42.466737][ T515] ? find_held_lock+0x2b/0x80 [ 42.467030][ T515] ? __virt_addr_valid+0x22a/0x450 [ 42.467325][ T515] ? __lock_release+0x5d/0x170 [ 42.467639][ T515] __sys_sendmsg+0x10b/0x1a0 [ 42.467941][ T515] ? __call_rcu_common.constprop.0+0x318/0x630 [ 42.468308][ T515] ? __sys_sendmsg_sock+0x20/0x20 [ 42.468619][ T515] ? rcu_is_watching+0x12/0xb0 [ 42.468914][ T515] do_syscall_64+0xc1/0xfd0 [ 42.469215][ T515] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.469580][ T515] RIP: 0033:0x7fc34604c1d7 [ 42.469877][ T515] 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 [ 42.470929][ T515] RSP: 002b:00007ffc183d0588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.471381][ T515] RAX: ffffffffffffffda RBX: 00007ffc183d0cb0 RCX: 00007fc34604c1d7 [ 42.471827][ T515] RDX: 0000000000000000 RSI: 00007ffc183d05f0 RDI: 0000000000000005 [ 42.472246][ T515] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.472696][ T515] R10: 00007fc345f48f60 R11: 0000000000000246 R12: 0000000000000002 [ 42.473135][ T515] R13: 00000000690dfa6d R14: 0000000000499600 R15: 0000000000000000 [ 42.473606][ T515] [ 42.473829][ T515] irq event stamp: 36933 [ 42.474054][ T515] hardirqs last enabled at (36933): [] finish_task_switch.isra.0+0x245/0x960 [ 42.474674][ T515] hardirqs last disabled at (36932): [] __schedule+0x94a/0x1b10 [ 42.475217][ T515] softirqs last enabled at (36764): [] handle_softirqs+0x352/0x610 [ 42.475754][ T515] softirqs last disabled at (36703): [] irq_exit_rcu+0xab/0x100 [ 42.476261][ T515] ---[ end trace 0000000000000000 ]---