================================================================== BUG: KASAN: use-after-free in __nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:47 [inline] BUG: KASAN: use-after-free in nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:52 [inline] BUG: KASAN: use-after-free in nf_ct_ecache_exist include/net/netfilter/nf_conntrack_ecache.h:42 [inline] BUG: KASAN: use-after-free in nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] BUG: KASAN: use-after-free in nf_confirm+0x575/0x5b0 net/netfilter/nf_conntrack_proto.c:154 BUG: KASAN: use-after-free in __nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:47 [inline] BUG: KASAN: use-after-free in nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:52 [inline] BUG: KASAN: use-after-free in nf_ct_ecache_exist include/net/netfilter/nf_conntrack_ecache.h:42 [inline] BUG: KASAN: use-after-free in nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] BUG: KASAN: use-after-free in nf_confirm+0x575/0x5b0 net/netfilter/nf_conntrack_proto.c:154 Read of size 1 at addr ffff88807bbeec04 by task syz-executor.5/25702 CPU: 0 PID: 25702 Comm: syz-executor.5 Not tainted 5.18.0-syzkaller-11439-g8ab2afa23bd1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 __nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:47 [inline] nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:52 [inline] nf_ct_ecache_exist include/net/netfilter/nf_conntrack_ecache.h:42 [inline] nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] nf_confirm+0x575/0x5b0 net/netfilter/nf_conntrack_proto.c:154 ipv4_confirm+0x17a/0x390 net/netfilter/nf_conntrack_proto.c:182 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc5/0x1f0 net/netfilter/core.c:620 nf_hook+0x1cb/0x5b0 include/linux/netfilter.h:262 NF_HOOK_COND include/linux/netfilter.h:295 [inline] ip_output+0x21f/0x310 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0xd4/0x260 net/ipv4/ip_output.c:1571 udp_send_skb+0x6c8/0x11a0 net/ipv4/udp.c:967 udp_sendmsg+0x1bee/0x2760 net/ipv4/udp.c:1254 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 rxrpc_send_data_packet+0x1762/0x1e30 net/rxrpc/output.c:451 rxrpc_queue_packet net/rxrpc/sendmsg.c:258 [inline] rxrpc_send_data+0x15c2/0x2e70 net/rxrpc/sendmsg.c:437 rxrpc_do_sendmsg+0xbfe/0x1350 net/rxrpc/sendmsg.c:750 rxrpc_sendmsg+0x429/0x640 net/rxrpc/af_rxrpc.c:561 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x334/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmmsg+0x195/0x470 net/socket.c:2632 __do_sys_sendmmsg net/socket.c:2661 [inline] __se_sys_sendmmsg net/socket.c:2658 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f6b72089109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6b731de168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f6b7219bf60 RCX: 00007f6b72089109 RDX: 0000000000000002 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f6b720e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe11e490df R14: 00007f6b731de300 R15: 0000000000022000 Allocated by task 7902: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:600 [inline] dummy_urb_enqueue+0x87/0x8e0 drivers/usb/gadget/udc/dummy_hcd.c:1270 usb_hcd_submit_urb+0x2b2/0x2250 drivers/usb/core/hcd.c:1555 usb_submit_urb+0x86d/0x18a0 drivers/usb/core/urb.c:594 usb_start_wait_urb+0x101/0x4c0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 usb_get_string+0xbe/0x1b0 drivers/usb/core/message.c:843 usb_string_sub+0xfa/0x3d0 drivers/usb/core/message.c:882 usb_get_langid drivers/usb/core/message.c:919 [inline] usb_string+0x1cc/0x530 drivers/usb/core/message.c:983 usb_cache_string+0x82/0x140 drivers/usb/core/message.c:1029 usb_enumerate_device drivers/usb/core/hub.c:2408 [inline] usb_new_device+0x15b/0x7d0 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5363 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Freed by task 25702: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kfree+0xd6/0x4d0 mm/slub.c:4555 nf_conntrack_free+0x100/0x630 net/netfilter/nf_conntrack_core.c:1680 nf_ct_destroy+0x1be/0x320 net/netfilter/nf_conntrack_core.c:610 nf_ct_put include/net/netfilter/nf_conntrack.h:184 [inline] nf_ct_put include/net/netfilter/nf_conntrack.h:181 [inline] __nf_ct_resolve_clash+0x624/0x785 net/netfilter/nf_conntrack_core.c:1013 nf_ct_resolve_clash+0x14a/0xa23 net/netfilter/nf_conntrack_core.c:1136 __nf_conntrack_confirm.cold+0x16/0x23e net/netfilter/nf_conntrack_core.c:1284 nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:62 [inline] nf_confirm+0x4ce/0x5b0 net/netfilter/nf_conntrack_proto.c:154 ipv4_confirm+0x17a/0x390 net/netfilter/nf_conntrack_proto.c:182 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc5/0x1f0 net/netfilter/core.c:620 nf_hook+0x1cb/0x5b0 include/linux/netfilter.h:262 NF_HOOK_COND include/linux/netfilter.h:295 [inline] ip_output+0x21f/0x310 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0xd4/0x260 net/ipv4/ip_output.c:1571 udp_send_skb+0x6c8/0x11a0 net/ipv4/udp.c:967 udp_sendmsg+0x1bee/0x2760 net/ipv4/udp.c:1254 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 rxrpc_send_data_packet+0x1762/0x1e30 net/rxrpc/output.c:451 rxrpc_queue_packet net/rxrpc/sendmsg.c:258 [inline] rxrpc_send_data+0x15c2/0x2e70 net/rxrpc/sendmsg.c:437 rxrpc_do_sendmsg+0xbfe/0x1350 net/rxrpc/sendmsg.c:750 rxrpc_sendmsg+0x429/0x640 net/rxrpc/af_rxrpc.c:561 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x334/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmmsg+0x195/0x470 net/socket.c:2632 __do_sys_sendmmsg net/socket.c:2661 [inline] __se_sys_sendmmsg net/socket.c:2658 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3647 __hw_addr_flush+0x152/0x240 net/core/dev_addr_lists.c:490 dev_addr_flush+0x1d/0x50 net/core/dev_addr_lists.c:535 free_netdev+0x1f5/0x620 net/core/dev.c:10698 netdev_run_todo+0xb18/0x10b0 net/core/dev.c:10352 sit_exit_batch_net+0x535/0x750 net/ipv6/sit.c:1951 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 The buggy address belongs to the object at ffff88807bbeec00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 4 bytes inside of 128-byte region [ffff88807bbeec00, ffff88807bbeec80) The buggy address belongs to the physical page: page:ffffea0001eefb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bbee flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888010c418c0 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 7988, tgid 7974 (syz-executor.3), ts 305443982792, free_ts 217248394435 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5426 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1797 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x985/0xd90 mm/slub.c:3002 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089 slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] __kmalloc_track_caller+0x2e7/0x320 mm/slub.c:4919 kmemdup+0x23/0x50 mm/util.c:129 kmemdup include/linux/fortify-string.h:456 [inline] mpls_dev_sysctl_register+0xaa/0x2d0 net/mpls/af_mpls.c:1406 mpls_add_dev net/mpls/af_mpls.c:1472 [inline] mpls_dev_notify+0x211/0x8a0 net/mpls/af_mpls.c:1612 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1943 call_netdevice_notifiers_extack net/core/dev.c:1981 [inline] call_netdevice_notifiers net/core/dev.c:1995 [inline] register_netdevice+0x109e/0x15b0 net/core/dev.c:10078 __ip_tunnel_create+0x398/0x5c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2e4/0x9d0 net/ipv4/ip_tunnel.c:1071 ops_init+0xaf/0x470 net/core/net_namespace.c:134 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3438 __vunmap+0x85d/0xd30 mm/vmalloc.c:2665 __vfree+0x3c/0xd0 mm/vmalloc.c:2713 vfree+0x5a/0x90 mm/vmalloc.c:2744 kvfree+0x2e/0x50 mm/util.c:653 htab_map_alloc+0xcc6/0x1240 kernel/bpf/hashtab.c:579 find_and_alloc_map kernel/bpf/syscall.c:131 [inline] map_create kernel/bpf/syscall.c:1082 [inline] __sys_bpf+0x8b8/0x5700 kernel/bpf/syscall.c:4899 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline] __se_sys_bpf kernel/bpf/syscall.c:5019 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5019 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88807bbeeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ffff88807bbeeb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807bbeec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807bbeec80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807bbeed00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================