================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff88807880bb60 by task syz-executor.1/18198 CPU: 1 PID: 18198 Comm: syz-executor.1 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 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 xfs_init_mount_workqueues+0x149/0x4f0 fs/xfs/xfs_super.c:551 xfs_fs_fill_super+0x2e9/0x1f30 fs/xfs/xfs_super.c:1500 get_tree_bdev+0x444/0x760 fs/super.c:1303 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 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: 0033:0x7f7cdd68d62a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f7cde485f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000baee RCX: 00007f7cdd68d62a RDX: 000000002000bb00 RSI: 0000000020000240 RDI: 00007f7cde485fe0 RBP: 00007f7cde486020 R08: 00007f7cde486020 R09: 0000000002000000 R10: 0000000002000000 R11: 0000000000000202 R12: 000000002000bb00 R13: 0000000020000240 R14: 00007f7cde485fe0 R15: 0000000020000000 Allocated by task 12773: 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 pskb_expand_head+0x237/0x1160 net/core/skbuff.c:1991 __skb_cow include/linux/skbuff.h:3560 [inline] skb_cow_head include/linux/skbuff.h:3594 [inline] batadv_skb_head_push+0xeb/0x280 net/batman-adv/soft-interface.c:72 batadv_send_skb_packet+0x114/0x6a0 net/batman-adv/send.c:86 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x608/0x960 net/batman-adv/bat_iv_ogm.c:1700 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 12773: 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 skb_kfree_head net/core/skbuff.c:856 [inline] skb_free_head+0x108/0x1a0 net/core/skbuff.c:868 skb_release_data+0x57a/0x820 net/core/skbuff.c:897 skb_release_all net/core/skbuff.c:962 [inline] __kfree_skb net/core/skbuff.c:976 [inline] kfree_skb_reason+0x11a/0x1e0 net/core/skbuff.c:1009 __netif_receive_skb_core+0x56e/0x38d0 net/core/dev.c:5453 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5477 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5593 process_backlog+0x13e/0x6d0 net/core/dev.c:5921 __napi_poll+0xb3/0x520 net/core/dev.c:6482 napi_poll net/core/dev.c:6549 [inline] net_rx_action+0x8d7/0xc50 net/core/dev.c:6659 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 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_periodic_work+0x726/0xb80 net/core/neighbour.c:994 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 The buggy address belongs to the object at ffff88807880b800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff88807880b800, ffff88807880bc00) The buggy address belongs to the physical page: page:ffffea0001e20200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78808 head:ffffea0001e20200 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 ffffea0001d5ce00 dead000000000002 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 6420, tgid 6420 (kworker/u4:14), ts 485645257420, free_ts 482882056458 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.constprop.0+0x99/0xd0 net/mac80211/ieee80211_i.h:2311 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2318 [inline] ieee80211_bss_info_update+0x410/0xb50 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x18c4/0x2d50 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 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] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3476 ptlock_alloc+0x21/0x70 mm/memory.c:5907 ptlock_init include/linux/mm.h:2792 [inline] pgtable_pte_page_ctor include/linux/mm.h:2813 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:66 [inline] pte_alloc_one+0x6c/0x230 arch/x86/mm/pgtable.c:33 __pte_alloc+0x6d/0x260 mm/memory.c:439 do_anonymous_page mm/memory.c:4040 [inline] do_pte_missing mm/memory.c:3632 [inline] handle_pte_fault mm/memory.c:4934 [inline] __handle_mm_fault+0x4004/0x4180 mm/memory.c:5076 handle_mm_fault+0x2c0/0x9c0 mm/memory.c:5222 do_user_addr_fault+0x2ed/0x1240 arch/x86/mm/fault.c:1371 handle_page_fault arch/x86/mm/fault.c:1556 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1612 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 Memory state around the buggy address: ffff88807880ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807880ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807880bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807880bb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807880bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================