================================================================== 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 ffff888029bd4dc4 by task kworker/0:7/5219 CPU: 0 PID: 5219 Comm: kworker/0:7 Not tainted 6.10.0-rc5-syzkaller-01158-g74d6529b78f7 #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:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 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 6585: 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_trace_noprof+0x19c/0x2c0 mm/slub.c:4154 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [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:2585 ___sys_sendmsg net/socket.c:2639 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668 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 6584: 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:2196 [inline] slab_free mm/slub.c:4438 [inline] kfree+0x149/0x360 mm/slub.c:4559 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+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:2208 __queue_work+0xc16/0xee0 kernel/workqueue.c:2360 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2411 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+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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 ffff888029bd4c00 which belongs to the cache kmalloc-cg-512 of size 512 The buggy address is located 452 bytes inside of freed 512-byte region [ffff888029bd4c00, ffff888029bd4e00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29bd4 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888065489901 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801504f140 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000001ffffefff ffff888065489901 head: 00fff00000000040 ffff88801504f140 0000000000000000 dead000000000001 head: 0000000000000000 0000000080100010 00000001ffffefff ffff888065489901 head: 00fff00000000002 ffffea0000a6f501 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4558, tgid 4558 (udevd), ts 39303951798, free_ts 39064440024 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683 __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:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3990 [inline] __do_kmalloc_node mm/slub.c:4122 [inline] kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4143 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6524 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2815 unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:2030 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 page last free pid 4547 tgid 4547 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2588 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2809 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Memory state around the buggy address: ffff888029bd4c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029bd4d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888029bd4d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029bd4e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888029bd4e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================