bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves ================================================================== BUG: KASAN: use-after-free in cfusbl_device_notify+0x10d/0x560 net/caif/caif_usb.c:138 Read of size 8 at addr ffff88801ee0c6f0 by task kworker/u4:1/5553 CPU: 0 PID: 5553 Comm: kworker/u4:1 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 cfusbl_device_notify+0x10d/0x560 net/caif/caif_usb.c:138 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1936 [inline] call_netdevice_notifiers_extack net/core/dev.c:1974 [inline] call_netdevice_notifiers net/core/dev.c:1988 [inline] netdev_wait_allrefs_any net/core/dev.c:10219 [inline] netdev_run_todo+0x84d/0xf50 net/core/dev.c:10333 default_device_exit_batch+0x5c9/0x630 net/core/dev.c:11341 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x767/0xb80 net/core/net_namespace.c:613 process_one_work+0x8fa/0x1370 kernel/workqueue.c:2289 worker_thread+0xa63/0x1210 kernel/workqueue.c:2436 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 19140: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x9b/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc_node+0xb3/0x190 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0x72/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:737 [inline] kvzalloc include/linux/slab.h:745 [inline] alloc_netdev_mqs+0x89/0xeb0 net/core/dev.c:10578 rtnl_create_link+0x2e7/0xa00 net/core/rtnetlink.c:3283 veth_newlink+0x2b2/0xc80 drivers/net/veth.c:1750 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline] __rtnl_newlink net/core/rtnetlink.c:3624 [inline] rtnl_newlink+0x1468/0x2010 net/core/rtnetlink.c:3637 rtnetlink_rcv_msg+0x7c7/0xe90 net/core/rtnetlink.c:6141 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa02/0xd10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x475/0x5f0 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __x64_sys_sendto+0xde/0xf0 net/socket.c:2128 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5553: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:523 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800 device_release+0x95/0x1c0 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x228/0x470 lib/kobject.c:721 netdev_run_todo+0xe5a/0xf50 net/core/dev.c:10352 default_device_exit_batch+0x5c9/0x630 net/core/dev.c:11341 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x767/0xb80 net/core/net_namespace.c:613 process_one_work+0x8fa/0x1370 kernel/workqueue.c:2289 worker_thread+0xa63/0x1210 kernel/workqueue.c:2436 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88801ee0c000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 1776 bytes inside of 4096-byte region [ffff88801ee0c000, ffff88801ee0d000) The buggy address belongs to the physical page: page:ffffea00007b8200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801ee0a000 pfn:0x1ee08 head:ffffea00007b8200 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 memcg:ffff888029ef2c81 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff88801244f500 ffffea0000f6aa10 ffffea00019ec010 raw: ffff88801ee0a000 0000000000040003 00000001ffffffff ffff888029ef2c81 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 4426, tgid 4426 (udevd), ts 1546646845109, free_ts 1546599245047 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x3449/0x35c0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7e0 mm/page_alloc.c:5549 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0xa2/0x190 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0x72/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:737 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x202/0xd10 fs/seq_file.c:210 call_read_iter include/linux/fs.h:2183 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7e2/0xbe0 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3a/0x1040 mm/page_alloc.c:3369 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x68/0x390 mm/slab.h:761 slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x14c/0x2a0 mm/slub.c:3491 kmalloc_node_trace+0x27/0x60 mm/slab_common.c:1075 kmalloc_node include/linux/slab.h:606 [inline] kzalloc_node include/linux/slab.h:731 [inline] __get_vm_area_node+0x126/0x360 mm/vmalloc.c:2508 __vmalloc_node_range+0x398/0x1370 mm/vmalloc.c:3187 __vmalloc_node mm/vmalloc.c:3292 [inline] vzalloc+0x79/0x90 mm/vmalloc.c:3365 alloc_counters+0xd4/0x7b0 net/ipv4/netfilter/ip_tables.c:801 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:823 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline] do_ipt_get_ctl+0xec4/0x18c0 net/ipv4/netfilter/ip_tables.c:1663 nf_getsockopt+0x292/0x2c0 net/netfilter/nf_sockopt.c:116 Memory state around the buggy address: ffff88801ee0c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801ee0c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801ee0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801ee0c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801ee0c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================