================================================================== BUG: KASAN: use-after-free in nft_commit_release net/netfilter/nf_tables_api.c:8467 [inline] BUG: KASAN: use-after-free in nf_tables_trans_destroy_work+0x7f4/0x820 net/netfilter/nf_tables_api.c:8513 Read of size 1 at addr ffff888022b3f554 by task kworker/1:3/8437 CPU: 1 PID: 8437 Comm: kworker/1:3 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events nf_tables_trans_destroy_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 nft_commit_release net/netfilter/nf_tables_api.c:8467 [inline] nf_tables_trans_destroy_work+0x7f4/0x820 net/netfilter/nf_tables_api.c:8513 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 8843: 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:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] nf_tables_addchain.constprop.0+0x7ff/0x1830 net/netfilter/nf_tables_api.c:2257 nf_tables_newchain+0x16d1/0x1ef0 net/netfilter/nf_tables_api.c:2595 nfnetlink_rcv_batch+0x171f/0x2600 net/netfilter/nfnetlink.c:517 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:638 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:656 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmsg+0xf3/0x1c0 net/socket.c:2565 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+0x63/0xcd Freed by task 8843: 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:367 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1759 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xe2/0x580 mm/slub.c:4567 nf_tables_chain_destroy+0x4ec/0x640 net/netfilter/nf_tables_api.c:1889 __nft_release_table+0x96c/0xcd0 net/netfilter/nf_tables_api.c:9996 nft_rcv_nl_event+0x3f6/0x5b0 net/netfilter/nf_tables_api.c:10047 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 blocking_notifier_call_chain kernel/notifier.c:382 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:370 netlink_release+0xcad/0x1db0 net/netlink/af_netlink.c:790 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888022b3f500 which belongs to the cache kmalloc-cg-128 of size 128 The buggy address is located 84 bytes inside of 128-byte region [ffff888022b3f500, ffff888022b3f580) The buggy address belongs to the physical page: page:ffffea00008acfc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22b3f flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000776d80 dead000000000005 ffff888011842a00 raw: 0000000000000000 0000000080100010 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 4394, tgid 4394 (syz-executor108), ts 43498019619, free_ts 43497433424 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x84f/0xe80 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] nf_tables_addchain.constprop.0+0x7ff/0x1830 net/netfilter/nf_tables_api.c:2257 nf_tables_newchain+0x16d1/0x1ef0 net/netfilter/nf_tables_api.c:2595 nfnetlink_rcv_batch+0x171f/0x2600 net/netfilter/nfnetlink.c:517 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:638 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:656 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __vunmap+0x85d/0xd30 mm/vmalloc.c:2696 free_work+0x58/0x70 mm/vmalloc.c:97 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff888022b3f400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888022b3f480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888022b3f500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888022b3f580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888022b3f600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================