wlan1: authentication with aa:09:b7:99:c0:d7 timed out ================================================================== BUG: KASAN: slab-use-after-free in __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] BUG: KASAN: slab-use-after-free in _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 Read of size 1 at addr ffff888041b7db40 by task kworker/u4:8/1045 CPU: 0 UID: 0 PID: 1045 Comm: kworker/u4:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events_unbound cfg80211_wiphy_work Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:580 kasan_check_byte include/linux/kasan.h:401 [inline] lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] lockref_get+0x15/0x60 lib/lockref.c:50 dget include/linux/dcache.h:350 [inline] __simple_recursive_removal+0x33/0x510 fs/libfs.c:609 debugfs_remove+0x5b/0x70 fs/debugfs/inode.c:800 ieee80211_sta_debugfs_remove+0x40/0x70 net/mac80211/debugfs_sta.c:1277 __sta_info_destroy_part2+0x352/0x450 net/mac80211/sta_info.c:1550 __sta_info_destroy net/mac80211/sta_info.c:1566 [inline] sta_info_destroy_addr+0xf5/0x140 net/mac80211/sta_info.c:1578 ieee80211_destroy_auth_data+0x12d/0x260 net/mac80211/mlme.c:4690 ieee80211_sta_work+0x11cf/0x3600 net/mac80211/mlme.c:8456 cfg80211_wiphy_work+0x2bb/0x470 net/wireless/core.c:435 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 6065: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_lru_noprof+0x35d/0x6d0 mm/slub.c:5307 __d_alloc+0x36/0x7a0 fs/dcache.c:1690 d_alloc_parallel+0xe1/0x1610 fs/dcache.c:2549 __lookup_slow+0x116/0x3d0 fs/namei.c:1801 simple_start_creating+0xfd/0x1e0 fs/libfs.c:2303 debugfs_start_creating+0x10f/0x180 fs/debugfs/inode.c:397 debugfs_create_dir+0x28/0x420 fs/debugfs/inode.c:581 ieee80211_sta_debugfs_add+0x12c/0x850 net/mac80211/debugfs_sta.c:1252 sta_info_insert_finish net/mac80211/sta_info.c:941 [inline] sta_info_insert_rcu+0x1c54/0x2840 net/mac80211/sta_info.c:1009 sta_info_insert+0x16/0xc0 net/mac80211/sta_info.c:1014 ieee80211_prep_connection+0xfce/0x13f0 net/mac80211/mlme.c:9055 ieee80211_mgd_auth+0xee6/0x1770 net/mac80211/mlme.c:9320 rdev_auth net/wireless/rdev-ops.h:486 [inline] cfg80211_mlme_auth+0x632/0x9c0 net/wireless/mlme.c:291 cfg80211_conn_do_work+0x501/0xd10 net/wireless/sme.c:182 cfg80211_sme_connect net/wireless/sme.c:625 [inline] cfg80211_connect+0x1862/0x21a0 net/wireless/sme.c:1527 nl80211_connect+0x17bc/0x1cd0 net/wireless/nl80211.c:13298 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6068: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free mm/slub.c:6638 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6748 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 __dentry_kill+0x4d2/0x660 fs/dcache.c:688 dput+0x19f/0x2b0 fs/dcache.c:911 find_next_child+0x1e5/0x250 fs/libfs.c:600 __simple_recursive_removal+0x10b/0x510 fs/libfs.c:617 debugfs_remove+0x5b/0x70 fs/debugfs/inode.c:800 ieee80211_debugfs_remove_netdev net/mac80211/debugfs_netdev.c:1019 [inline] ieee80211_debugfs_recreate_netdev+0xbf/0x1460 net/mac80211/debugfs_netdev.c:1032 drv_remove_interface+0x1fa/0x590 net/mac80211/driver-ops.c:125 _ieee80211_change_mac net/mac80211/iface.c:286 [inline] ieee80211_change_mac+0x912/0x12d0 net/mac80211/iface.c:318 netif_set_mac_address+0x2fc/0x4c0 net/core/dev.c:9873 dev_set_mac_address+0x12b/0x260 net/core/dev_api.c:336 bond_set_mac_address+0x26c/0x7b0 drivers/net/bonding/bond_main.c:4833 netif_set_mac_address+0x2fc/0x4c0 net/core/dev.c:9873 do_setlink+0x88c/0x41c0 net/core/rtnetlink.c:3103 rtnl_changelink net/core/rtnetlink.c:3769 [inline] __rtnl_newlink net/core/rtnetlink.c:3928 [inline] rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888041b7da70 which belongs to the cache dentry of size 312 The buggy address is located 208 bytes inside of freed 312-byte region [ffff888041b7da70, ffff888041b7dba8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888041b7c8d0 pfn:0x41b7c head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880428e4601 flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000240 ffff888030410780 ffffea000112ae10 ffffea0001083e90 raw: ffff888041b7c8d0 0000000000150011 00000000f5000000 ffff8880428e4601 head: 04fff00000000240 ffff888030410780 ffffea000112ae10 ffffea0001083e90 head: ffff888041b7c8d0 0000000000150011 00000000f5000000 ffff8880428e4601 head: 04fff00000000001 ffffea000106df01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_RECLAIMABLE|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4726, tgid 4726 (udevd), ts 35285078992, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3059 [inline] allocate_slab+0x96/0x350 mm/slub.c:3232 new_slab mm/slub.c:3286 [inline] ___slab_alloc+0xf56/0x1990 mm/slub.c:4655 __slab_alloc+0x65/0x100 mm/slub.c:4778 __slab_alloc_node mm/slub.c:4854 [inline] slab_alloc_node mm/slub.c:5276 [inline] kmem_cache_alloc_lru_noprof+0x3ef/0x6d0 mm/slub.c:5307 __d_alloc+0x36/0x7a0 fs/dcache.c:1690 d_alloc_parallel+0xe1/0x1610 fs/dcache.c:2549 __lookup_slow+0x116/0x3d0 fs/namei.c:1801 lookup_slow+0x53/0x70 fs/namei.c:1833 walk_component+0x2d2/0x400 fs/namei.c:2151 lookup_last fs/namei.c:2652 [inline] path_lookupat+0x163/0x430 fs/namei.c:2676 filename_lookup+0x212/0x570 fs/namei.c:2705 do_readlinkat+0xd9/0x500 fs/stat.c:576 page_owner free stack trace missing Memory state around the buggy address: ffff888041b7da00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb ffff888041b7da80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888041b7db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888041b7db80: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 ffff888041b7dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================