================================================================== BUG: KASAN: slab-use-after-free in is_dynamic_key.part.0+0x1de/0x1f0 kernel/locking/lockdep.c:1264 Read of size 8 at addr ffff88804eb2cb60 by task kworker/1:16/14158 CPU: 1 PID: 14158 Comm: kworker/1:16 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 Workqueue: ceph-msgr ceph_con_workfn 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:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 is_dynamic_key.part.0+0x1de/0x1f0 kernel/locking/lockdep.c:1264 is_dynamic_key kernel/locking/lockdep.c:883 [inline] register_lock_class+0xbe3/0x1120 kernel/locking/lockdep.c:1297 __lock_acquire+0x10a/0x5df0 kernel/locking/lockdep.c:4951 lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691 process_one_work+0x8e4/0x15e0 kernel/workqueue.c:2380 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 16934: 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:966 [inline] __kmalloc_node_track_caller+0x5f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535 __alloc_skb+0x129/0x330 net/core/skbuff.c:604 alloc_skb include/linux/skbuff.h:1275 [inline] nlmsg_new include/net/netlink.h:1003 [inline] inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166 fib6_del_route net/ipv6/ip6_fib.c:1993 [inline] fib6_del+0xfbb/0x1670 net/ipv6/ip6_fib.c:2028 fib6_clean_node+0x39c/0x5c0 net/ipv6/ip6_fib.c:2190 fib6_walk_continue+0x487/0x8e0 net/ipv6/ip6_fib.c:2112 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2160 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2240 __fib6_clean_all+0x107/0x2e0 net/ipv6/ip6_fib.c:2256 rt6_sync_down_dev net/ipv6/route.c:4887 [inline] rt6_disable_ip+0x804/0x9e0 net/ipv6/route.c:4892 addrconf_ifdown.isra.0+0x11a/0x1940 net/ipv6/addrconf.c:3755 addrconf_notify+0x106/0x19f0 net/ipv6/addrconf.c:3678 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 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] __dev_notify_flags+0x1ea/0x2d0 net/core/dev.c:8568 dev_change_flags+0x11b/0x170 net/core/dev.c:8604 do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836 rtnl_group_changelink net/core/rtnetlink.c:3380 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3636 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6388 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2572 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:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 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 The buggy address belongs to the object at ffff88804eb2c800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff88804eb2c800, ffff88804eb2cc00) The buggy address belongs to the physical page: page:ffffea00013aca00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88804eb29000 pfn:0x4eb28 head:ffffea00013aca00 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 ffff888012441dc0 ffffea0001fa8e10 ffffea0001e90010 raw: ffff88804eb29000 0000000000100005 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 56, tgid 56 (kworker/u4:4), ts 124553918330, free_ts 124224879089 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 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+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:680 [inline] ieee802_11_parse_elems_full+0x106/0x1340 net/mac80211/util.c:1609 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2311 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2318 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline] ieee80211_ibss_rx_queued_mgmt+0xc20/0x2d50 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline] ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1648 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3452 [inline] kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3497 alloc_vmap_area+0x160/0x1e00 mm/vmalloc.c:1600 __get_vm_area_node+0x145/0x3f0 mm/vmalloc.c:2535 __vmalloc_node_range+0x24c/0x1380 mm/vmalloc.c:3199 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:1113 [inline] copy_process+0x133f/0x76b0 kernel/fork.c:2238 kernel_clone+0xeb/0x890 kernel/fork.c:2831 user_mode_thread+0xb1/0xf0 kernel/fork.c:2909 call_usermodehelper_exec_sync kernel/umh.c:133 [inline] call_usermodehelper_exec_work+0x6d/0x180 kernel/umh.c:164 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 Memory state around the buggy address: ffff88804eb2ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804eb2ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804eb2cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804eb2cb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804eb2cc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================