================================================================== 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 ffff888013f72704 by task syz-executor.2/9494 CPU: 3 PID: 9494 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-11712-g700170bf6b4d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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/0x467 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+0x6eb/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmsg net/socket.c:2575 [inline] __do_sys_sendmsg net/socket.c:2584 [inline] __se_sys_sendmsg net/socket.c:2582 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582 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: 0033:0x7f9e10689109 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:00007f9e11804168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9e1079bf60 RCX: 00007f9e10689109 RDX: 0000000000000548 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007f9e106e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec6b2148f R14: 00007f9e11804300 R15: 0000000000022000 Allocated by task 9494: 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+0xa6/0xd0 mm/kasan/common.c:524 kasan_kmalloc include/linux/kasan.h:234 [inline] __do_kmalloc mm/slab.c:3696 [inline] __kmalloc_track_caller+0x206/0x4d0 mm/slab.c:3711 __do_krealloc mm/slab_common.c:1185 [inline] krealloc+0x87/0xf0 mm/slab_common.c:1218 nf_ct_ext_add+0x19f/0x3d0 net/netfilter/nf_conntrack_extend.c:117 nf_ct_labels_ext_add include/net/netfilter/nf_conntrack_labels.h:45 [inline] init_conntrack.constprop.0+0x563/0x1270 net/netfilter/nf_conntrack_core.c:1734 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1830 [inline] nf_conntrack_in+0xc86/0x1790 net/netfilter/nf_conntrack_core.c:1985 ipv4_conntrack_local+0x113/0x260 net/netfilter/nf_conntrack_proto.c:213 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 __ip_local_out+0x262/0x520 net/ipv4/ip_output.c:115 ip_local_out net/ipv4/ip_output.c:124 [inline] ip_send_skb+0x46/0x260 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+0x6eb/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmsg net/socket.c:2575 [inline] __do_sys_sendmsg net/socket.c:2584 [inline] __se_sys_sendmsg net/socket.c:2582 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582 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 Freed by task 9494: 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+0x13d/0x180 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] __cache_free mm/slab.c:3425 [inline] kfree+0x113/0x310 mm/slab.c:3796 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+0x6eb/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmsg net/socket.c:2575 [inline] __do_sys_sendmsg net/socket.c:2584 [inline] __se_sys_sendmsg net/socket.c:2582 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582 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 The buggy address belongs to the object at ffff888013f72700 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 4 bytes inside of 128-byte region [ffff888013f72700, ffff888013f72780) The buggy address belongs to the physical page: page:ffffea00004fdc80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f72 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00007ba448 ffffea000054ab08 ffff888010c40400 raw: 0000000000000000 ffff888013f72000 0000000100000010 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 0x242220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 4078, tgid 4077 (syz-executor.2), ts 172504628966, free_ts 165953945287 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages_slowpath.constprop.0+0x2e9/0x2160 mm/page_alloc.c:4973 __alloc_pages+0x436/0x510 mm/page_alloc.c:5439 __alloc_pages_node include/linux/gfp.h:587 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x350 mm/slab.c:2569 cache_alloc_refill+0x27f/0x380 mm/slab.c:2942 ____cache_alloc mm/slab.c:3024 [inline] ____cache_alloc mm/slab.c:3007 [inline] __do_cache_alloc mm/slab.c:3253 [inline] slab_alloc mm/slab.c:3295 [inline] kmem_cache_alloc_trace+0x380/0x4a0 mm/slab.c:3567 kmalloc include/linux/slab.h:600 [inline] __hw_addr_create net/core/dev_addr_lists.c:60 [inline] __hw_addr_add_ex+0x22d/0x7e0 net/core/dev_addr_lists.c:118 __hw_addr_add net/core/dev_addr_lists.c:135 [inline] dev_addr_init+0x13a/0x220 net/core/dev_addr_lists.c:558 alloc_netdev_mqs+0x2f4/0x1180 net/core/dev.c:10593 __ip_tunnel_create+0x201/0x5c0 net/ipv4/ip_tunnel.c:254 ip_tunnel_init_net+0x2e4/0x9d0 net/ipv4/ip_tunnel.c:1071 vti_init_net+0x2a/0x370 net/ipv4/ip_vti.c:504 ops_init+0xaf/0x470 net/core/net_namespace.c:134 setup_net+0x5d1/0xc50 net/core/net_namespace.c:325 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 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 slab_destroy mm/slab.c:1615 [inline] slabs_destroy+0x89/0xc0 mm/slab.c:1635 cache_flusharray mm/slab.c:3397 [inline] ___cache_free+0x34e/0x670 mm/slab.c:3460 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1b0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc mm/slab.c:3302 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x265/0x560 mm/slab.c:3499 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9a/0xe0 include/linux/audit.h:323 vfs_fstatat+0x73/0xb0 fs/stat.c:254 __do_sys_newfstatat+0x91/0x110 fs/stat.c:425 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: ffff888013f72600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888013f72680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888013f72700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888013f72780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888013f72800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================