bond66 (unregistering): Released all slaves bond65 (unregistering): (slave bridge83): Releasing backup interface bridge83 (unregistering): left promiscuous mode bond65 (unregistering): Released all slaves ================================================================== BUG: KASAN: slab-use-after-free in mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1553 Read of size 8 at addr ffff88804335b000 by task kworker/u4:1/12 CPU: 1 PID: 12 Comm: kworker/u4:1 Not tainted 6.5.0-rc4-syzkaller-01158-g81083076a007 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1553 tcf_chain_head_change_item net/sched/cls_api.c:493 [inline] tcf_chain0_head_change_cb_del+0x19c/0x3d0 net/sched/cls_api.c:940 tcf_block_put_ext.part.0+0x30/0x2e0 net/sched/cls_api.c:1505 tcf_block_put_ext+0x2e/0x40 net/sched/cls_api.c:1503 clsact_destroy+0x283/0x990 net/sched/sch_ingress.c:300 __qdisc_destroy+0xc4/0x450 net/sched/sch_generic.c:1063 qdisc_put+0xd1/0xf0 net/sched/sch_generic.c:1090 shutdown_scheduler_queue+0xa5/0x160 net/sched/sch_generic.c:1143 dev_shutdown+0x17e/0x430 net/sched/sch_generic.c:1477 unregister_netdevice_many_notify+0x5bd/0x1a20 net/core/dev.c:10920 unregister_netdevice_many net/core/dev.c:10986 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11445 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 worker_thread+0x687/0x1110 kernel/workqueue.c:2748 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 12: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:985 [inline] __kmalloc_node_track_caller+0x5e/0x100 mm/slab_common.c:1005 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 pskb_expand_head+0x236/0x1170 net/core/skbuff.c:2042 netlink_trim+0x1eb/0x240 net/netlink/af_netlink.c:1326 netlink_broadcast_filtered+0xc4/0xef0 net/netlink/af_netlink.c:1535 netlink_broadcast net/netlink/af_netlink.c:1580 [inline] nlmsg_multicast include/net/netlink.h:1079 [inline] nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2618 unregister_netdevice_many_notify+0xc2e/0x1a20 net/core/dev.c:10953 unregister_netdevice_many net/core/dev.c:10986 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11445 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 worker_thread+0x687/0x1110 kernel/workqueue.c:2748 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Freed by task 12: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook+0x10b/0x1e0 mm/slub.c:1818 slab_free mm/slub.c:3801 [inline] __kmem_cache_free+0xb8/0x2f0 mm/slub.c:3814 skb_kfree_head net/core/skbuff.c:894 [inline] skb_free_head+0x110/0x1b0 net/core/skbuff.c:906 skb_release_data+0x5ba/0x870 net/core/skbuff.c:936 skb_release_all net/core/skbuff.c:1002 [inline] __kfree_skb net/core/skbuff.c:1016 [inline] consume_skb net/core/skbuff.c:1232 [inline] consume_skb+0xd2/0x170 net/core/skbuff.c:1226 netlink_broadcast_filtered+0x3bc/0xef0 net/netlink/af_netlink.c:1558 netlink_broadcast net/netlink/af_netlink.c:1580 [inline] nlmsg_multicast include/net/netlink.h:1079 [inline] nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2618 unregister_netdevice_many_notify+0xc2e/0x1a20 net/core/dev.c:10953 unregister_netdevice_many net/core/dev.c:10986 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11445 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 worker_thread+0x687/0x1110 kernel/workqueue.c:2748 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2649 netlink_release+0xf0d/0x2000 net/netlink/af_netlink.c:833 __sock_release+0xcd/0x290 net/socket.c:654 sock_close+0x1c/0x20 net/socket.c:1386 __fput+0x3fd/0xac0 fs/file_table.c:384 task_work_run+0x14d/0x240 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2649 netlink_release+0xf0d/0x2000 net/netlink/af_netlink.c:833 __sock_release+0xcd/0x290 net/socket.c:654 sock_close+0x1c/0x20 net/socket.c:1386 __fput+0x3fd/0xac0 fs/file_table.c:384 task_work_run+0x14d/0x240 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa99/0x2a20 kernel/exit.c:874 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x23ea/0x2770 kernel/signal.c:2881 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88804335b000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of freed 2048-byte region [ffff88804335b000, ffff88804335b800) The buggy address belongs to the physical page: page:ffffea00010cd600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43358 head:ffffea00010cd600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012842000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 32508, tgid 32506 (syz-executor.4), ts 1012899452349, free_ts 1012656800393 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2292 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3215 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc_node_track_caller+0x4d/0x100 mm/slab_common.c:1005 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 __alloc_skb+0x12b/0x330 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1287 [inline] _sctp_make_chunk+0x51/0x260 net/sctp/sm_make_chunk.c:1443 sctp_make_data net/sctp/sm_make_chunk.c:1475 [inline] sctp_make_datafrag_empty+0x16d/0x230 net/sctp/sm_make_chunk.c:740 sctp_datamsg_from_user+0x591/0x12c0 net/sctp/chunk.c:262 sctp_sendmsg_to_asoc+0xadb/0x1a90 net/sctp/socket.c:1858 sctp_sendmsg+0xee4/0x1e80 net/sctp/socket.c:2030 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2348 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443 __unfreeze_partials+0x21d/0x240 mm/slub.c:2647 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x172/0x3b0 mm/slub.c:3494 kmem_cache_zalloc include/linux/slab.h:693 [inline] jbd2_alloc_handle include/linux/jbd2.h:1597 [inline] new_handle fs/jbd2/transaction.c:476 [inline] jbd2__journal_start+0x190/0x690 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x40f/0x5c0 fs/ext4/ext4_jbd2.c:111 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:5919 __mark_inode_dirty+0x1e0/0xd50 fs/fs-writeback.c:2430 mark_inode_dirty include/linux/fs.h:2148 [inline] generic_write_end+0x35f/0x440 fs/buffer.c:2320 ext4_da_write_end+0x1fe/0xb40 fs/ext4/inode.c:2988 generic_perform_write+0x32e/0x600 mm/filemap.c:3934 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299 ext4_file_write_iter+0x7ee/0x1950 fs/ext4/file.c:722 Memory state around the buggy address: ffff88804335af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804335af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804335b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804335b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804335b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================