bond0 (unregistering): Released all slaves ================================================================== BUG: KASAN: slab-use-after-free in cfusbl_device_notify+0x7c4/0x860 net/caif/caif_usb.c:138 Read of size 8 at addr ffff888036e626f0 by task kworker/u4:11/5546 CPU: 1 PID: 5546 Comm: kworker/u4:11 Not tainted 6.2.0-syzkaller-13115-gee3f96b16468 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 cfusbl_device_notify+0x7c4/0x860 net/caif/caif_usb.c:138 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] netdev_wait_allrefs_any net/core/dev.c:10228 [inline] netdev_run_todo+0xc54/0x1100 net/core/dev.c:10342 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11353 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 10047: kasan_save_stack+0x22/0x40 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 mm/kasan/common.c:333 [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:967 [inline] __kmalloc_node+0x5d/0xd0 mm/slab_common.c:974 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:603 kvmalloc include/linux/slab.h:737 [inline] kvzalloc include/linux/slab.h:745 [inline] alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10587 rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312 veth_newlink+0x226/0x9c0 drivers/net/veth.c:1791 rtnl_newlink_create net/core/rtnetlink.c:3440 [inline] __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3657 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xde/0x190 net/socket.c:745 __sys_sendto+0x23a/0x340 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2153 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5546: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 kvfree+0x46/0x50 mm/util.c:649 device_release+0xa3/0x240 drivers/base/core.c:2436 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:729 netdev_run_todo+0x762/0x1100 net/core/dev.c:10361 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11353 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888036e62000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 1776 bytes inside of freed 4096-byte region [ffff888036e62000, ffff888036e63000) The buggy address belongs to the physical page: page:ffffea0000db9800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888036e66000 pfn:0x36e60 head:ffffea0000db9800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888075f4aac1 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff88801244f500 ffffea0000ddf810 ffff88801244e7c8 raw: ffff888036e66000 0000000000040003 00000001ffffffff ffff888075f4aac1 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5108, tgid 5108 (syz-executor.0), ts 260007881972, free_ts 0 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x1190/0x2f80 mm/page_alloc.c:4325 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5591 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x330 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:987 kmemdup+0x2c/0x60 mm/util.c:130 kmemdup include/linux/fortify-string.h:702 [inline] __addrconf_sysctl_register+0x9d/0x3d0 net/ipv6/addrconf.c:7070 addrconf_sysctl_register net/ipv6/addrconf.c:7135 [inline] addrconf_sysctl_register+0x139/0x1d0 net/ipv6/addrconf.c:7124 ipv6_add_dev+0xa80/0x13b0 net/ipv6/addrconf.c:450 addrconf_notify+0x63d/0x19f0 net/ipv6/addrconf.c:3552 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] register_netdevice+0xfb4/0x1640 net/core/dev.c:10079 page_owner free stack trace missing Memory state around the buggy address: ffff888036e62580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036e62600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888036e62680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888036e62700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036e62780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================