================================================================== BUG: KASAN: slab-use-after-free in nft_ctx_update include/net/netfilter/nf_tables.h:1831 [inline] BUG: KASAN: slab-use-after-free in nft_commit_release net/netfilter/nf_tables_api.c:9530 [inline] BUG: KASAN: slab-use-after-free in nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Read of size 2 at addr ffff888023f741c4 by task kworker/1:3/4880 CPU: 1 UID: 0 PID: 4880 Comm: kworker/1:3 Not tainted 6.10.0-rc6-next-20240703-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events nf_tables_trans_destroy_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 nft_ctx_update include/net/netfilter/nf_tables.h:1831 [inline] nft_commit_release net/netfilter/nf_tables_api.c:9530 [inline] nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 process_one_work kernel/workqueue.c:3224 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305 worker_thread+0x86d/0xd40 kernel/workqueue.c:3383 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 8618: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189 kmalloc_noprof include/linux/slab.h:680 [inline] kzalloc_noprof include/linux/slab.h:806 [inline] nf_tables_newtable+0x52e/0x1dc0 net/netfilter/nf_tables_api.c:1465 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:522 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:644 [inline] nfnetlink_rcv+0x1427/0x2a90 net/netfilter/nfnetlink.c:662 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 8608: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2231 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 mm/slub.c:4594 nf_tables_table_destroy net/netfilter/nf_tables_api.c:1672 [inline] __nft_release_table+0xe80/0xf40 net/netfilter/nf_tables_api.c:11517 nft_rcv_nl_event+0x55f/0x6d0 net/netfilter/nf_tables_api.c:11576 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388 netlink_release+0x11a6/0x1b10 net/netlink/af_netlink.c:787 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:204 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 insert_work+0x3e/0x330 kernel/workqueue.c:2182 __queue_work+0xc16/0xee0 kernel/workqueue.c:2334 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2385 queue_work include/linux/workqueue.h:621 [inline] schedule_work include/linux/workqueue.h:682 [inline] __rhashtable_remove_fast_one include/linux/rhashtable.h:1069 [inline] __rhashtable_remove_fast include/linux/rhashtable.h:1093 [inline] rhltable_remove+0x1097/0x1160 include/linux/rhashtable.h:1144 nft_chain_del net/netfilter/nf_tables_api.c:9781 [inline] __nft_release_table+0xc57/0xf40 net/netfilter/nf_tables_api.c:11513 nft_rcv_nl_event+0x55f/0x6d0 net/netfilter/nf_tables_api.c:11576 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388 netlink_release+0x11a6/0x1b10 net/netlink/af_netlink.c:787 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:204 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888023f74000 which belongs to the cache kmalloc-cg-512 of size 512 The buggy address is located 452 bytes inside of freed 512-byte region [ffff888023f74000, ffff888023f74200) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23f74 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888011f71801 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff88801504f140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 00000001fdffffff ffff888011f71801 head: 00fff00000000040 ffff88801504f140 dead000000000100 dead000000000122 head: 0000000000000000 0000000080100010 00000001fdffffff ffff888011f71801 head: 00fff00000000002 ffffea00008fdd01 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5090, tgid 5090 (syz-executor), ts 63577204394, free_ts 63086753501 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2ccb/0x2d80 mm/page_alloc.c:3480 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4738 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2300 allocate_slab+0x5a/0x2f0 mm/slub.c:2463 new_slab mm/slub.c:2516 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3702 __slab_alloc+0x58/0xa0 mm/slub.c:3792 __slab_alloc_node mm/slub.c:3845 [inline] slab_alloc_node mm/slub.c:4025 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4164 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650 netif_alloc_rx_queues net/core/dev.c:10171 [inline] alloc_netdev_mqs+0xa1f/0xff0 net/core/dev.c:11121 rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3461 veth_newlink+0x2c5/0xcd0 drivers/net/veth.c:1814 rtnl_newlink_create net/core/rtnetlink.c:3597 [inline] __rtnl_newlink net/core/rtnetlink.c:3817 [inline] rtnl_newlink+0x14fe/0x2070 net/core/rtnetlink.c:3830 rtnetlink_rcv_msg+0x8a0/0x1180 net/core/rtnetlink.c:6728 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357 page last free pid 5095 tgid 5095 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2644 discard_slab mm/slub.c:2562 [inline] __put_partials+0xeb/0x130 mm/slub.c:3030 put_cpu_partial+0x17c/0x250 mm/slub.c:3105 __slab_free+0x2ea/0x3d0 mm/slub.c:4343 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3975 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624 kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700 kernfs_create_dir_ns+0x43/0x120 fs/kernfs/dir.c:1061 sysfs_create_dir_ns+0x189/0x3a0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x435/0x8d0 lib/kobject.c:240 kobject_add_varg lib/kobject.c:374 [inline] kobject_init_and_add+0x124/0x190 lib/kobject.c:457 br_add_if+0x387/0xef0 net/bridge/br_if.c:613 do_set_master net/core/rtnetlink.c:2788 [inline] do_setlink+0xe70/0x41f0 net/core/rtnetlink.c:2994 Memory state around the buggy address: ffff888023f74080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888023f74100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888023f74180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888023f74200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888023f74280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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