[ 18.492749][ T259] ip (259) used greatest stack depth: 24400 bytes left [ 19.147813][ T272] ip (272) used greatest stack depth: 23888 bytes left [ 29.951963][ T356] 8021q: 802.1Q VLAN Support v1.8 [ 30.813430][ T362] gre: GRE over IPv4 demultiplexer driver [ 30.923114][ T362] ip6_gre: GRE over IPv6 tunneling driver [ 45.099745][ T446] GACT probability NOT on [ 73.292486][ T660] ================================================================== [ 73.292872][ T660] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 73.293159][ T660] Read of size 1 at addr ffff888008b046ac by task ip/660 [ 73.293370][ T660] [ 73.293462][ T660] CPU: 2 UID: 0 PID: 660 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 73.293469][ T660] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 73.293472][ T660] Call Trace: [ 73.293478][ T660] [ 73.293481][ T660] dump_stack_lvl+0x82/0xc0 [ 73.293490][ T660] print_address_description.constprop.0+0x2c/0x3a0 [ 73.293503][ T660] ? kobject_put+0xbb/0xd0 [ 73.293507][ T660] print_report+0xb4/0x270 [ 73.293510][ T660] ? kobject_put+0xbb/0xd0 [ 73.293513][ T660] ? kasan_addr_to_slab+0x21/0x70 [ 73.293517][ T660] ? kobject_put+0xbb/0xd0 [ 73.293520][ T660] kasan_report+0xca/0x100 [ 73.293524][ T660] ? kobject_put+0xbb/0xd0 [ 73.293529][ T660] kobject_put+0xbb/0xd0 [ 73.293533][ T660] netdev_run_todo+0x5f0/0xc60 [ 73.293538][ T660] ? dev_ingress_queue_create+0x190/0x190 [ 73.293544][ T660] ? generic_xdp_install+0x410/0x410 [ 73.293547][ T660] ? unregister_netdevice_many+0x20/0x20 [ 73.293552][ T660] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 73.293559][ T660] rtnl_dellink+0x350/0xa30 [ 73.293565][ T660] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 73.293584][ T660] ? find_held_lock+0x2b/0x80 [ 73.293596][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.293602][ T660] ? find_held_lock+0x2b/0x80 [ 73.293606][ T660] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 73.293608][ T660] ? __lock_release+0x5d/0x170 [ 73.293613][ T660] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 73.293616][ T660] rtnetlink_rcv_msg+0x709/0xc00 [ 73.293620][ T660] ? rtnl_port_fill+0x850/0x850 [ 73.293623][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.293630][ T660] netlink_rcv_skb+0x121/0x340 [ 73.293635][ T660] ? rtnl_port_fill+0x850/0x850 [ 73.293639][ T660] ? netlink_ack+0xdd0/0xdd0 [ 73.293646][ T660] ? netlink_deliver_tap+0x13e/0x340 [ 73.293648][ T660] ? netlink_deliver_tap+0xc3/0x340 [ 73.293652][ T660] netlink_unicast+0x4aa/0x780 [ 73.293656][ T660] ? netlink_attachskb+0x810/0x810 [ 73.293660][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.293666][ T660] netlink_sendmsg+0x714/0xbd0 [ 73.293670][ T660] ? netlink_unicast+0x780/0x780 [ 73.293674][ T660] ? __import_iovec+0x230/0x3b0 [ 73.293680][ T660] ? netlink_unicast+0x780/0x780 [ 73.293684][ T660] ____sys_sendmsg+0x3dd/0x890 [ 73.293689][ T660] ? get_timestamp.constprop.0+0x380/0x380 [ 73.293692][ T660] ? __copy_msghdr+0x3c0/0x3c0 [ 73.293699][ T660] ___sys_sendmsg+0xed/0x170 [ 73.293702][ T660] ? kasan_record_aux_stack+0x8c/0xa0 [ 73.293705][ T660] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 73.293715][ T660] ? copy_msghdr_from_user+0x110/0x110 [ 73.293720][ T660] ? find_held_lock+0x2b/0x80 [ 73.293724][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.293730][ T660] ? find_held_lock+0x2b/0x80 [ 73.293733][ T660] ? __virt_addr_valid+0x22a/0x450 [ 73.293741][ T660] ? __lock_release+0x5d/0x170 [ 73.293752][ T660] __sys_sendmsg+0x10b/0x1a0 [ 73.293756][ T660] ? __call_rcu_common.constprop.0+0x318/0x630 [ 73.293762][ T660] ? __sys_sendmsg_sock+0x20/0x20 [ 73.293772][ T660] ? rcu_is_watching+0x12/0xb0 [ 73.293776][ T660] do_syscall_64+0xc1/0xfd0 [ 73.293783][ T660] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 73.293787][ T660] RIP: 0033:0x7f70f06981d7 [ 73.293793][ T660] 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 [ 73.293796][ T660] RSP: 002b:00007ffc9e6e0cb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 73.293800][ T660] RAX: ffffffffffffffda RBX: 00007ffc9e6e13e0 RCX: 00007f70f06981d7 [ 73.293803][ T660] RDX: 0000000000000000 RSI: 00007ffc9e6e0d20 RDI: 0000000000000005 [ 73.293804][ T660] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 73.293806][ T660] R10: 00007f70f0594f60 R11: 0000000000000246 R12: 0000000000000002 [ 73.293808][ T660] R13: 00000000690decdf R14: 0000000000499600 R15: 0000000000000000 [ 73.293814][ T660] [ 73.293816][ T660] [ 73.307683][ T660] Allocated by task 399: [ 73.307842][ T660] kasan_save_stack+0x24/0x40 [ 73.308035][ T660] kasan_save_track+0x14/0x30 [ 73.308204][ T660] __kasan_kmalloc+0x7b/0x90 [ 73.308372][ T660] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 73.308556][ T660] alloc_netdev_mqs+0x7d/0x1370 [ 73.308732][ T660] rtnl_create_link+0xa9e/0xe20 [ 73.308926][ T660] rtnl_newlink_create+0x203/0x770 [ 73.309111][ T660] __rtnl_newlink+0x231/0xa30 [ 73.309293][ T660] rtnl_newlink+0x693/0xa60 [ 73.309478][ T660] rtnetlink_rcv_msg+0x709/0xc00 [ 73.309656][ T660] netlink_rcv_skb+0x121/0x340 [ 73.309900][ T660] netlink_unicast+0x4aa/0x780 [ 73.310079][ T660] netlink_sendmsg+0x714/0xbd0 [ 73.310249][ T660] ____sys_sendmsg+0x3dd/0x890 [ 73.310420][ T660] ___sys_sendmsg+0xed/0x170 [ 73.310598][ T660] __sys_sendmsg+0x10b/0x1a0 [ 73.310790][ T660] do_syscall_64+0xc1/0xfd0 [ 73.310978][ T660] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 73.311205][ T660] [ 73.311298][ T660] Freed by task 660: [ 73.311426][ T660] kasan_save_stack+0x24/0x40 [ 73.311640][ T660] kasan_save_track+0x14/0x30 [ 73.311832][ T660] __kasan_save_free_info+0x3b/0x60 [ 73.312010][ T660] __kasan_slab_free+0x3f/0x60 [ 73.312194][ T660] kfree+0x21d/0x540 [ 73.312334][ T660] device_release+0x9c/0x210 [ 73.312622][ T660] kobject_cleanup+0xfe/0x360 [ 73.312813][ T660] netdev_run_todo+0x81f/0xc60 [ 73.313019][ T660] rtnl_dellink+0x350/0xa30 [ 73.313187][ T660] rtnetlink_rcv_msg+0x709/0xc00 [ 73.313358][ T660] netlink_rcv_skb+0x121/0x340 [ 73.313532][ T660] netlink_unicast+0x4aa/0x780 [ 73.313730][ T660] netlink_sendmsg+0x714/0xbd0 [ 73.313904][ T660] ____sys_sendmsg+0x3dd/0x890 [ 73.314101][ T660] ___sys_sendmsg+0xed/0x170 [ 73.314273][ T660] __sys_sendmsg+0x10b/0x1a0 [ 73.314444][ T660] do_syscall_64+0xc1/0xfd0 [ 73.314621][ T660] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 73.314848][ T660] [ 73.315036][ T660] The buggy address belongs to the object at ffff888008b04000 [ 73.315036][ T660] which belongs to the cache kmalloc-4k of size 4096 [ 73.315461][ T660] The buggy address is located 1708 bytes inside of [ 73.315461][ T660] freed 4096-byte region [ffff888008b04000, ffff888008b05000) [ 73.316001][ T660] [ 73.316085][ T660] The buggy address belongs to the physical page: [ 73.316292][ T660] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b00 [ 73.316725][ T660] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 73.317136][ T660] flags: 0x80000000000040(head|node=0|zone=1) [ 73.317391][ T660] page_type: f5(slab) [ 73.317530][ T660] raw: 0080000000000040 ffff888001043700 ffffea0000215a10 ffffea0000232210 [ 73.317933][ T660] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 73.318440][ T660] head: 0080000000000040 ffff888001043700 ffffea0000215a10 ffffea0000232210 [ 73.318765][ T660] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 73.319112][ T660] head: 0080000000000003 ffffea000022c001 00000000ffffffff 00000000ffffffff [ 73.319426][ T660] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 73.319756][ T660] page dumped because: kasan: bad access detected [ 73.320129][ T660] [ 73.320232][ T660] Memory state around the buggy address: [ 73.320394][ T660] ffff888008b04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.320752][ T660] ffff888008b04600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.321012][ T660] >ffff888008b04680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.321265][ T660] ^ [ 73.321524][ T660] ffff888008b04700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.321794][ T660] ffff888008b04780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.322049][ T660] ================================================================== [ 73.322505][ T660] Disabling lock debugging due to kernel taint [ 73.322813][ T660] ------------[ cut here ]------------ [ 73.323004][ T660] refcount_t: underflow; use-after-free. [ 73.323223][ T660] WARNING: CPU: 2 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 73.323672][ T660] Modules linked in: act_gact cls_flower sch_ingress ip6_gre ip6_tunnel tunnel6 gre 8021q dummy vrf veth [ 73.324092][ T660] CPU: 2 UID: 0 PID: 660 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 73.324640][ T660] Tainted: [B]=BAD_PAGE [ 73.324829][ T660] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 73.325075][ T660] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 73.325330][ T660] 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 c5 8e 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 [ 73.326095][ T660] RSP: 0018:ffffc90000fcf1f0 EFLAGS: 00010286 [ 73.326340][ T660] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 73.326753][ T660] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 73.327059][ T660] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1ebe134 [ 73.327349][ T660] R10: 0000000000000003 R11: ffffc90000fced80 R12: 0000000000000001 [ 73.327624][ T660] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 73.327935][ T660] FS: 00007f70f04ca800(0000) GS:ffff8880a58f2000(0000) knlGS:0000000000000000 [ 73.328353][ T660] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.328603][ T660] CR2: 00000000004e7430 CR3: 000000000e6e8002 CR4: 0000000000772ef0 [ 73.328904][ T660] PKRU: 55555554 [ 73.329163][ T660] Call Trace: [ 73.329345][ T660] [ 73.329460][ T660] netdev_run_todo+0x5f0/0xc60 [ 73.329677][ T660] ? dev_ingress_queue_create+0x190/0x190 [ 73.329913][ T660] ? generic_xdp_install+0x410/0x410 [ 73.330231][ T660] ? unregister_netdevice_many+0x20/0x20 [ 73.330455][ T660] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 73.330715][ T660] rtnl_dellink+0x350/0xa30 [ 73.330964][ T660] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 73.331329][ T660] ? find_held_lock+0x2b/0x80 [ 73.331539][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.331772][ T660] ? find_held_lock+0x2b/0x80 [ 73.331999][ T660] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 73.332304][ T660] ? __lock_release+0x5d/0x170 [ 73.332522][ T660] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 73.332834][ T660] rtnetlink_rcv_msg+0x709/0xc00 [ 73.333053][ T660] ? rtnl_port_fill+0x850/0x850 [ 73.333359][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.333617][ T660] netlink_rcv_skb+0x121/0x340 [ 73.333844][ T660] ? rtnl_port_fill+0x850/0x850 [ 73.334043][ T660] ? netlink_ack+0xdd0/0xdd0 [ 73.334354][ T660] ? netlink_deliver_tap+0x13e/0x340 [ 73.334604][ T660] ? netlink_deliver_tap+0xc3/0x340 [ 73.334845][ T660] netlink_unicast+0x4aa/0x780 [ 73.335093][ T660] ? netlink_attachskb+0x810/0x810 [ 73.335397][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.335626][ T660] netlink_sendmsg+0x714/0xbd0 [ 73.335840][ T660] ? netlink_unicast+0x780/0x780 [ 73.336100][ T660] ? __import_iovec+0x230/0x3b0 [ 73.336397][ T660] ? netlink_unicast+0x780/0x780 [ 73.336618][ T660] ____sys_sendmsg+0x3dd/0x890 [ 73.336813][ T660] ? get_timestamp.constprop.0+0x380/0x380 [ 73.337179][ T660] ? __copy_msghdr+0x3c0/0x3c0 [ 73.337398][ T660] ___sys_sendmsg+0xed/0x170 [ 73.337665][ T660] ? kasan_record_aux_stack+0x8c/0xa0 [ 73.337896][ T660] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 73.338260][ T660] ? copy_msghdr_from_user+0x110/0x110 [ 73.338473][ T660] ? find_held_lock+0x2b/0x80 [ 73.338675][ T660] ? __lock_acquire+0x449/0x7e0 [ 73.338867][ T660] ? find_held_lock+0x2b/0x80 [ 73.339156][ T660] ? __virt_addr_valid+0x22a/0x450 [ 73.339376][ T660] ? __lock_release+0x5d/0x170 [ 73.339594][ T660] __sys_sendmsg+0x10b/0x1a0 [ 73.339818][ T660] ? __call_rcu_common.constprop.0+0x318/0x630 [ 73.340067][ T660] ? __sys_sendmsg_sock+0x20/0x20 [ 73.340295][ T660] ? rcu_is_watching+0x12/0xb0 [ 73.340490][ T660] do_syscall_64+0xc1/0xfd0 [ 73.340720][ T660] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 73.341121][ T660] RIP: 0033:0x7f70f06981d7 [ 73.341340][ T660] 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 [ 73.342161][ T660] RSP: 002b:00007ffc9e6e0cb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 73.342483][ T660] RAX: ffffffffffffffda RBX: 00007ffc9e6e13e0 RCX: 00007f70f06981d7 [ 73.342893][ T660] RDX: 0000000000000000 RSI: 00007ffc9e6e0d20 RDI: 0000000000000005 [ 73.343170][ T660] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 73.343471][ T660] R10: 00007f70f0594f60 R11: 0000000000000246 R12: 0000000000000002 [ 73.343895][ T660] R13: 00000000690decdf R14: 0000000000499600 R15: 0000000000000000 [ 73.344189][ T660] [ 73.344345][ T660] irq event stamp: 43741 [ 73.344503][ T660] hardirqs last enabled at (43741): [] __schedule+0x13c7/0x1b10 [ 73.344959][ T660] hardirqs last disabled at (43740): [] __schedule+0x94a/0x1b10 [ 73.345334][ T660] softirqs last enabled at (43508): [] handle_softirqs+0x352/0x610 [ 73.345777][ T660] softirqs last disabled at (43501): [] irq_exit_rcu+0xab/0x100 [ 73.346093][ T660] ---[ end trace 0000000000000000 ]---