batadv1 (unregistering): left allmulticast mode bond11 (unregistering): Released all slaves bond10 (unregistering): Released all slaves bond9 (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 ffff88803026d000 by task kworker/u4:47/15787 CPU: 1 PID: 15787 Comm: kworker/u4:47 Not tainted 6.5.0-rc4-syzkaller-01198-gb98a5aa7e4c2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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 3927: 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+0x60/0x100 mm/slab_common.c:992 kmalloc_node include/linux/slab.h:602 [inline] kzalloc_node include/linux/slab.h:714 [inline] qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938 qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996 mq_init+0x34d/0x490 net/sched/sch_mq.c:90 qdisc_create_dflt+0x101/0x3e0 net/sched/sch_generic.c:1003 attach_default_qdiscs net/sched/sch_generic.c:1182 [inline] dev_activate+0xad1/0x1310 net/sched/sch_generic.c:1236 __dev_open+0x388/0x4d0 net/core/dev.c:1459 __dev_change_flags+0x56f/0x730 net/core/dev.c:8594 dev_change_flags+0x9a/0x170 net/core/dev.c:8666 dev_ifsioc+0x9ad/0x1090 net/core/dev_ioctl.c:529 dev_ioctl+0x224/0x1090 net/core/dev_ioctl.c:786 sock_do_ioctl+0x1fc/0x290 net/socket.c:1204 sock_ioctl+0x205/0x6e0 net/socket.c:1307 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 2701: 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 rcu_do_batch kernel/rcu/tree.c:2135 [inline] rcu_core+0x7fb/0x1bb0 kernel/rcu/tree.c:2399 __do_softirq+0x218/0x965 kernel/softirq.c:553 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 qdisc_put+0xd1/0xf0 net/sched/sch_generic.c:1090 shutdown_scheduler_queue+0xa5/0x160 net/sched/sch_generic.c:1143 netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline] dev_shutdown+0xb6/0x430 net/sched/sch_generic.c:1475 unregister_netdevice_many_notify+0x5bd/0x1a20 net/core/dev.c:10920 unregister_netdevice_many net/core/dev.c:10986 [inline] unregister_netdevice_queue+0x2e5/0x3c0 net/core/dev.c:10866 unregister_netdevice include/linux/netdevice.h:3106 [inline] __tun_detach+0x116f/0x1470 drivers/net/tun.c:684 tun_detach drivers/net/tun.c:700 [inline] tun_chr_close+0xc8/0x240 drivers/net/tun.c:3493 __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 qdisc_put+0xd1/0xf0 net/sched/sch_generic.c:1090 shutdown_scheduler_queue+0xa5/0x160 net/sched/sch_generic.c:1143 netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline] dev_shutdown+0xb6/0x430 net/sched/sch_generic.c:1475 unregister_netdevice_many_notify+0x5bd/0x1a20 net/core/dev.c:10920 unregister_netdevice_many net/core/dev.c:10986 [inline] unregister_netdevice_queue+0x2e5/0x3c0 net/core/dev.c:10866 unregister_netdevice include/linux/netdevice.h:3106 [inline] __tun_detach+0x116f/0x1470 drivers/net/tun.c:684 tun_detach drivers/net/tun.c:700 [inline] tun_chr_close+0xc8/0x240 drivers/net/tun.c:3493 __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 The buggy address belongs to the object at ffff88803026d000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of freed 2048-byte region [ffff88803026d000, ffff88803026d800) The buggy address belongs to the physical page: page:ffffea0000c09a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30268 head:ffffea0000c09a00 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 5480, tgid 5474 (syz-executor.4), ts 145043649950, free_ts 0 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+0x4c/0x100 mm/slab_common.c:998 kmalloc_array include/linux/slab.h:619 [inline] kcalloc include/linux/slab.h:650 [inline] cache_create_net+0xa0/0x220 net/sunrpc/cache.c:1749 nfsd_idmap_init+0x11b/0x250 fs/nfsd/nfs4idmap.c:476 nfsd_net_init+0x55/0x210 fs/nfsd/nfsctl.c:1515 ops_init+0xb9/0x650 net/core/net_namespace.c:136 setup_net+0x422/0xa40 net/core/net_namespace.c:339 copy_net_ns+0x2fa/0x670 net/core/net_namespace.c:491 create_new_namespaces+0x3ea/0xb10 kernel/nsproxy.c:110 page_owner free stack trace missing Memory state around the buggy address: ffff88803026cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803026cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803026d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803026d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803026d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================