================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff888034e04b60 by task syz-executor.0/16661 CPU: 1 PID: 16661 Comm: syz-executor.0 Not tainted 6.3.0-rc4-next-20230330-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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 lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 wq_init_lockdep kernel/workqueue.c:3604 [inline] alloc_workqueue+0x3f8/0x1110 kernel/workqueue.c:4476 wg_newlink+0x27e/0x920 drivers/net/wireguard/device.c:337 rtnl_newlink_create net/core/rtnetlink.c:3443 [inline] __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3660 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 RIP: 0033:0x7f554548c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5546188168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f55455ac120 RCX: 00007f554548c0f9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000007 RBP: 00007f55454e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb269078f R14: 00007f5546188300 R15: 0000000000022000 Allocated by task 5988: 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+0x5e/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 Freed by task 5988: 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 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x19ea/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 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3331 neigh_destroy+0x433/0x660 net/core/neighbour.c:910 neigh_release include/net/neighbour.h:447 [inline] neigh_cleanup_and_release net/core/neighbour.c:103 [inline] neigh_del net/core/neighbour.c:225 [inline] neigh_remove_one+0x446/0x570 net/core/neighbour.c:246 neigh_forced_gc net/core/neighbour.c:276 [inline] neigh_alloc net/core/neighbour.c:476 [inline] ___neigh_create+0x1696/0x2a40 net/core/neighbour.c:640 ip6_finish_output2+0xfef/0x1570 net/ipv6/ip6_output.c:125 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x234/0x330 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 The buggy address belongs to the object at ffff888034e04800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff888034e04800, ffff888034e04c00) The buggy address belongs to the physical page: page:ffffea0000d38000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34e00 head:ffffea0000d38000 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 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 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 5183, tgid 5183 (kworker/1:4), ts 188736449286, free_ts 0 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] neigh_alloc net/core/neighbour.c:486 [inline] ___neigh_create+0x156f/0x2a40 net/core/neighbour.c:640 ip6_finish_output2+0xfef/0x1570 net/ipv6/ip6_output.c:125 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718 addrconf_dad_completed+0x37a/0xe00 net/ipv6/addrconf.c:4254 addrconf_dad_work+0x75d/0x1390 net/ipv6/addrconf.c:4162 page_owner free stack trace missing Memory state around the buggy address: ffff888034e04a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888034e04a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888034e04b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888034e04b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888034e04c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================