================================================================== BUG: KASAN: use-after-free in nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 Read of size 4 at addr ffff88807bc9e2b8 by task syz-executor.2/31148 CPU: 1 PID: 31148 Comm: syz-executor.2 Not tainted 5.17.0-rc1-syzkaller-00339-g169387e2aa29 #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+0x1dc/0x2d8 lib/dump_stack.c:106 print_address_description+0x65/0x3a0 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:459 nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 __nf_register_net_hook+0x27e/0x8d0 net/netfilter/core.c:429 nf_register_net_hook+0xaa/0x180 net/netfilter/core.c:571 nft_register_flowtable_net_hooks+0x3c5/0x730 net/netfilter/nf_tables_api.c:7249 nf_tables_newflowtable+0x2022/0x2cf0 net/netfilter/nf_tables_api.c:7447 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:513 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x10e6/0x2550 net/netfilter/nfnetlink.c:652 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x81a/0x9f0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0xaec/0xe60 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmsg+0x280/0x370 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe531977059 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:00007fe5302cb168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe531a8a030 RCX: 00007fe531977059 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000006 RBP: 00007fe5319d108d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc49844b2f R14: 00007fe5302cb300 R15: 0000000000022000 Allocated by task 31141: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:270 [inline] kmem_cache_alloc_trace+0x9d/0x330 mm/slub.c:3257 kmalloc include/linux/slab.h:581 [inline] nft_netdev_hook_alloc net/netfilter/nf_tables_api.c:1806 [inline] nf_tables_parse_netdev_hooks+0x195/0x730 net/netfilter/nf_tables_api.c:1860 nft_flowtable_parse_hook+0x45a/0x880 net/netfilter/nf_tables_api.c:7153 nf_tables_newflowtable+0x1c56/0x2cf0 net/netfilter/nf_tables_api.c:7438 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:513 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x10e6/0x2550 net/netfilter/nfnetlink.c:652 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x81a/0x9f0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0xaec/0xe60 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmsg+0x280/0x370 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 31141: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x180 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:236 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kfree+0xb8/0x2e0 mm/slub.c:4562 nf_tables_flowtable_destroy+0x1fd/0x2a0 net/netfilter/nf_tables_api.c:7835 __nft_release_table+0x516/0xe70 net/netfilter/nf_tables_api.c:9684 nft_rcv_nl_event+0x497/0x570 net/netfilter/nf_tables_api.c:9751 notifier_call_chain kernel/notifier.c:84 [inline] blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:319 netlink_release+0xf37/0x17a0 net/netlink/af_netlink.c:788 __sock_release net/socket.c:650 [inline] sock_close+0xd8/0x260 net/socket.c:1318 __fput+0x3fc/0x870 fs/file_table.c:311 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3591 cfg80211_update_known_bss+0x174/0x9a0 cfg80211_bss_update+0x17a/0x2170 net/wireless/scan.c:1708 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2464 [inline] cfg80211_inform_bss_frame_data+0x9b3/0x2010 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x75b/0xbe0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1690/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x850/0x1130 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3591 cfg80211_update_known_bss+0x174/0x9a0 cfg80211_bss_update+0x17a/0x2170 net/wireless/scan.c:1708 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2464 [inline] cfg80211_inform_bss_frame_data+0x9b3/0x2010 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x75b/0xbe0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1690/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x850/0x1130 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff88807bc9e280 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 56 bytes inside of 96-byte region [ffff88807bc9e280, ffff88807bc9e2e0) The buggy address belongs to the page: page:ffffea0001ef2780 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807bc9e000 pfn:0x7bc9e flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001e2cac0 dead000000000003 ffff888011441780 raw: ffff88807bc9e000 0000000080200017 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3642, ts 164286815049, free_ts 164124409536 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4165 __alloc_pages+0x255/0x580 mm/page_alloc.c:5389 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0xce/0x3f0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x3fe/0xc30 mm/slub.c:3018 __slab_alloc mm/slub.c:3105 [inline] slab_alloc_node mm/slub.c:3196 [inline] slab_alloc mm/slub.c:3238 [inline] __kmalloc+0x2eb/0x380 mm/slub.c:4420 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:715 [inline] tnode_alloc net/ipv4/fib_trie.c:331 [inline] tnode_new+0xb8/0x330 net/ipv4/fib_trie.c:384 inflate+0x4b9/0xe90 net/ipv4/fib_trie.c:598 resize+0x330/0xed0 net/ipv4/fib_trie.c:868 trie_rebalance net/ipv4/fib_trie.c:1094 [inline] fib_insert_node+0x5eb/0xba0 net/ipv4/fib_trie.c:1138 fib_table_insert+0x8d3/0x24e0 net/ipv4/fib_trie.c:1365 fib_magic+0x447/0x610 net/ipv4/fib_frontend.c:1087 fib_add_ifaddr+0x140/0x580 net/ipv4/fib_frontend.c:1109 fib_inetaddr_event+0x12b/0x2e0 net/ipv4/fib_frontend.c:1420 notifier_call_chain kernel/notifier.c:84 [inline] blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:319 __inet_insert_ifa+0x9f8/0xc20 net/ipv4/devinet.c:555 inet_rtm_newaddr+0xfc6/0x1880 net/ipv4/devinet.c:958 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x7d/0x580 mm/page_alloc.c:3404 free_slab mm/slub.c:2043 [inline] discard_slab mm/slub.c:2049 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2536 put_cpu_partial+0x116/0x180 mm/slub.c:2612 do_slab_free mm/slub.c:3497 [inline] ___cache_free+0x107/0x160 mm/slub.c:3516 qlist_free_all mm/kasan/quarantine.c:176 [inline] kasan_quarantine_reduce+0x169/0x1f0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:260 [inline] slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3230 [inline] slab_alloc mm/slub.c:3238 [inline] __kmalloc+0x1ed/0x380 mm/slub.c:4420 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:715 [inline] fib6_info_alloc+0x2c/0xd0 net/ipv6/ip6_fib.c:156 ip6_route_info_create+0x507/0x1a50 net/ipv6/route.c:3759 ip6_route_add+0x22/0x120 net/ipv6/route.c:3853 addrconf_add_mroute net/ipv6/addrconf.c:2488 [inline] addrconf_add_dev+0x441/0x600 net/ipv6/addrconf.c:2506 addrconf_dev_config+0x11b/0x3a0 net/ipv6/addrconf.c:3377 addrconf_notify+0x17f4/0x2110 net/ipv6/addrconf.c:3626 notifier_call_chain kernel/notifier.c:84 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:392 call_netdevice_notifiers_info net/core/dev.c:1919 [inline] netdev_state_change+0x1aa/0x270 net/core/dev.c:1309 Memory state around the buggy address: ffff88807bc9e180: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88807bc9e200: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc >ffff88807bc9e280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff88807bc9e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff88807bc9e380: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================