bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_0: left allmulticast mode bridge_slave_0: left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state ================================================================== BUG: KASAN: slab-use-after-free in tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 Read of size 8 at addr ffff88802c92d208 by task kworker/u4:3/12705 CPU: 0 PID: 12705 Comm: kworker/u4:3 Not tainted 6.5.0-rc3-next-20230724-syzkaller #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 tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 dev_tcx_uninstall include/net/tcx.h:174 [inline] unregister_netdevice_many_notify+0x5e7/0x1a20 net/core/dev.c:10899 unregister_netdevice_many net/core/dev.c:10964 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11417 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:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 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 26898: 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:1024 [inline] __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1044 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 __alloc_skb+0x12b/0x330 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1289 [inline] mrp_pdu_init net/802/mrp.c:313 [inline] mrp_pdu_append_vecattr_event+0x943/0x1260 net/802/mrp.c:412 mrp_attr_event+0x17b/0x290 net/802/mrp.c:507 mrp_mad_event net/802/mrp.c:587 [inline] mrp_join_timer+0x61/0x120 net/802/mrp.c:604 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 Freed by task 26898: 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:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822 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_add_bulk net/core/skbuff.c:1073 [inline] kfree_skb_list_reason+0x1af/0x4b0 net/core/skbuff.c:1095 __dev_xmit_skb net/core/dev.c:3833 [inline] __dev_queue_xmit+0x256a/0x3d60 net/core/dev.c:4296 dev_queue_xmit include/linux/netdevice.h:3086 [inline] mrp_queue_xmit net/802/mrp.c:364 [inline] mrp_join_timer+0x94/0x120 net/802/mrp.c:608 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __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 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372 tcx_entry_free include/net/tcx.h:96 [inline] ingress_destroy+0x39f/0x520 net/sched/sch_ingress.c:127 qdisc_create+0xa57/0x10a0 net/sched/sch_api.c:1360 tc_modify_qdisc+0xab3/0x1bf0 net/sched/sch_api.c:1703 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2575 netlink_unicast_kernel net/netlink/af_netlink.c:1344 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1370 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1939 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 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 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:2653 netlink_release+0xf0d/0x2000 net/netlink/af_netlink.c:833 __sock_release net/socket.c:654 [inline] sock_release+0x8b/0x1d0 net/socket.c:682 netlink_kernel_release+0x4e/0x60 net/netlink/af_netlink.c:2125 uevent_net_exit+0xc1/0x290 lib/kobject_uevent.c:799 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 setup_net+0x64d/0xa40 net/core/net_namespace.c:362 copy_net_ns+0x2fa/0x670 net/core/net_namespace.c:491 create_new_namespaces+0x3ea/0xb10 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x3da/0x930 kernel/fork.c:3446 __do_sys_unshare kernel/fork.c:3517 [inline] __se_sys_unshare kernel/fork.c:3515 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3515 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 The buggy address belongs to the object at ffff88802c92d000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 520 bytes inside of freed 2048-byte region [ffff88802c92d000, ffff88802c92d800) The buggy address belongs to the physical page: page:ffffea0000b24a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2c928 head:ffffea0000b24a00 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 ffffea0000a6ee00 dead000000000002 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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5090, tgid 5090 (syz-executor.2), ts 120393478314, free_ts 114784294624 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0x10d7/0x31b0 mm/page_alloc.c:3256 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4512 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2017 new_slab mm/slub.c:2070 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3223 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322 __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1044 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:1083 [inline] nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2618 rtnl_notify net/core/rtnetlink.c:771 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:4044 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4060 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4047 [inline] rtnetlink_event+0x16e/0x1f0 net/core/rtnetlink.c:6474 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1160 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2383 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2478 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:3478 [inline] __kmem_cache_alloc_node+0x19b/0x350 mm/slub.c:3517 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1115 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] ref_tracker_alloc+0x17c/0x5a0 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4075 [inline] netdev_hold include/linux/netdevice.h:4104 [inline] netdev_hold include/linux/netdevice.h:4099 [inline] rx_queue_add_kobject net/core/net-sysfs.c:1084 [inline] net_rx_queue_update_kobjects+0x27f/0x5e0 net/core/net-sysfs.c:1142 register_queue_kobjects net/core/net-sysfs.c:1802 [inline] netdev_register_kobject+0x274/0x3f0 net/core/net-sysfs.c:2047 register_netdevice+0xd4c/0x1630 net/core/dev.c:10108 veth_newlink+0x521/0xa50 drivers/net/veth.c:1938 rtnl_newlink_create net/core/rtnetlink.c:3471 [inline] __rtnl_newlink+0x115e/0x18c0 net/core/rtnetlink.c:3688 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3701 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2575 Memory state around the buggy address: ffff88802c92d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802c92d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802c92d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802c92d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802c92d300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================