================================================================== BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:901 [inline] BUG: KASAN: slab-use-after-free in hlist_del_rcu include/linux/rculist.h:513 [inline] BUG: KASAN: slab-use-after-free in lockdep_unregister_key+0x417/0x460 kernel/locking/lockdep.c:6397 Write of size 8 at addr ffff88802d958368 by task kworker/0:0/31668 CPU: 0 PID: 31668 Comm: kworker/0:0 Not tainted 6.3.0-rc4-next-20230330-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: events pwq_unbound_release_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 __hlist_del include/linux/list.h:901 [inline] hlist_del_rcu include/linux/rculist.h:513 [inline] lockdep_unregister_key+0x417/0x460 kernel/locking/lockdep.c:6397 wq_unregister_lockdep kernel/workqueue.c:3615 [inline] pwq_unbound_release_workfn+0x258/0x340 kernel/workqueue.c:3863 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 Allocated by task 7473: 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 __netdev_alloc_skb+0x74/0x410 net/core/skbuff.c:668 __netdev_alloc_skb_ip_align include/linux/skbuff.h:3195 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:3205 [inline] batadv_iv_ogm_aggregate_new+0x106/0x4e0 net/batman-adv/bat_iv_ogm.c:558 batadv_iv_ogm_queue_add net/batman-adv/bat_iv_ogm.c:670 [inline] batadv_iv_ogm_schedule_buff+0xea2/0x1520 net/batman-adv/bat_iv_ogm.c:849 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x333/0x960 net/batman-adv/bat_iv_ogm.c:1712 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 16169: 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] consume_skb net/core/skbuff.c:1189 [inline] consume_skb+0xd0/0x170 net/core/skbuff.c:1183 batadv_forw_packet_free+0x1f0/0x270 net/batman-adv/send.c:471 batadv_iv_send_outstanding_bat_ogm_packet+0x2b0/0x960 net/batman-adv/bat_iv_ogm.c:1718 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 ffff88802d958000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 872 bytes inside of freed 1024-byte region [ffff88802d958000, ffff88802d958400) The buggy address belongs to the physical page: page:ffffea0000b65600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d958 head:ffffea0000b65600 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 7378, tgid 7378 (kworker/u4:8), ts 1950844830200, free_ts 556201082238 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 kasan_depopulate_vmalloc_pte+0x60/0x80 mm/kasan/shadow.c:427 apply_to_pte_range mm/memory.c:2585 [inline] apply_to_pmd_range mm/memory.c:2629 [inline] apply_to_pud_range mm/memory.c:2665 [inline] apply_to_p4d_range mm/memory.c:2701 [inline] __apply_to_page_range+0x68c/0x1030 mm/memory.c:2735 kasan_release_vmalloc+0xab/0xc0 mm/kasan/shadow.c:544 __purge_vmap_area_lazy+0x886/0x1e60 mm/vmalloc.c:1767 drain_vmap_area_work+0x54/0xd0 mm/vmalloc.c:1800 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 Memory state around the buggy address: ffff88802d958200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802d958280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802d958300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802d958380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802d958400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================