================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 Read of size 8 at addr ffff88801d300298 by task syz-executor.3/15588 CPU: 1 PID: 15588 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller-01461-g496bc5861c73 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 htab_map_alloc+0x9b/0xe60 kernel/bpf/hashtab.c:506 map_create+0x90c/0x1200 kernel/bpf/syscall.c:1333 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5659 __do_sys_bpf kernel/bpf/syscall.c:5784 [inline] __se_sys_bpf kernel/bpf/syscall.c:5782 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5782 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f05a1a7dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f05a27760c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f05a1babf80 RCX: 00007f05a1a7dea9 RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00007f05a1aca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f05a1babf80 R15: 00007ffeadcae148 Allocated by task 10: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc_node_track_caller+0x24e/0x4e0 mm/slub.c:3986 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 alloc_skb include/linux/skbuff.h:1308 [inline] nlmsg_new include/net/netlink.h:1015 [inline] inet6_rt_notify+0xdf/0x290 net/ipv6/route.c:6175 fib6_del_route net/ipv6/ip6_fib.c:2008 [inline] fib6_del+0x10c5/0x1600 net/ipv6/ip6_fib.c:2043 fib6_clean_node+0x2f7/0x5e0 net/ipv6/ip6_fib.c:2205 fib6_walk_continue+0x658/0x8f0 net/ipv6/ip6_fib.c:2127 fib6_walk+0x168/0x2b0 net/ipv6/ip6_fib.c:2175 fib6_clean_tree net/ipv6/ip6_fib.c:2255 [inline] __fib6_clean_all+0x31f/0x4b0 net/ipv6/ip6_fib.c:2271 rt6_sync_down_dev net/ipv6/route.c:4903 [inline] rt6_disable_ip+0x170/0x890 net/ipv6/route.c:4908 addrconf_ifdown+0x15d/0x1bc0 net/ipv6/addrconf.c:3855 addrconf_notify+0x3cb/0x1020 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2016 [inline] call_netdevice_notifiers net/core/dev.c:2030 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1571 unregister_netdevice_many_notify+0x544/0x16e0 net/core/dev.c:11180 unregister_netdevice_many net/core/dev.c:11263 [inline] default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11742 ops_exit_list net/core/net_namespace.c:175 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:637 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 10: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x153/0x3a0 mm/slub.c:4390 skb_kfree_head net/core/skbuff.c:1033 [inline] skb_free_head net/core/skbuff.c:1045 [inline] skb_release_data+0x676/0x880 net/core/skbuff.c:1072 skb_release_all net/core/skbuff.c:1137 [inline] __kfree_skb net/core/skbuff.c:1151 [inline] consume_skb+0xb1/0x160 net/core/skbuff.c:1373 netlink_broadcast_filtered+0x1168/0x1290 net/netlink/af_netlink.c:1546 nlmsg_multicast_filtered include/net/netlink.h:1125 [inline] nlmsg_multicast include/net/netlink.h:1144 [inline] nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2607 fib6_del_route net/ipv6/ip6_fib.c:2008 [inline] fib6_del+0x10c5/0x1600 net/ipv6/ip6_fib.c:2043 fib6_clean_node+0x2f7/0x5e0 net/ipv6/ip6_fib.c:2205 fib6_walk_continue+0x658/0x8f0 net/ipv6/ip6_fib.c:2127 fib6_walk+0x168/0x2b0 net/ipv6/ip6_fib.c:2175 fib6_clean_tree net/ipv6/ip6_fib.c:2255 [inline] __fib6_clean_all+0x31f/0x4b0 net/ipv6/ip6_fib.c:2271 rt6_sync_down_dev net/ipv6/route.c:4903 [inline] rt6_disable_ip+0x170/0x890 net/ipv6/route.c:4908 addrconf_ifdown+0x15d/0x1bc0 net/ipv6/addrconf.c:3855 addrconf_notify+0x3cb/0x1020 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2016 [inline] call_netdevice_notifiers net/core/dev.c:2030 [inline] dev_close_many+0x33c/0x4c0 net/core/dev.c:1571 unregister_netdevice_many_notify+0x544/0x16e0 net/core/dev.c:11180 unregister_netdevice_many net/core/dev.c:11263 [inline] default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11742 ops_exit_list net/core/net_namespace.c:175 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:637 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88801d300000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 664 bytes inside of freed 1024-byte region [ffff88801d300000, ffff88801d300400) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801d303000 pfn:0x1d300 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000a40(workingset|slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000a40 ffff888015041dc0 ffffea00007ae410 ffffea0001853210 raw: ffff88801d303000 000000000010000f 00000001ffffffff 0000000000000000 head: 00fff80000000a40 ffff888015041dc0 ffffea00007ae410 ffffea0001853210 head: ffff88801d303000 000000000010000f 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea000074c001 ffffea000074c048 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 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 11, tgid -603676289 (kworker/u8:1), ts 11, free_ts 89424242991 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x2e5/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] ieee802_11_parse_elems_full+0xd5/0x2870 net/mac80211/parse.c:880 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2330 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2337 [inline] ieee80211_inform_bss+0x15f/0x1080 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x1049/0x2330 net/wireless/scan.c:2277 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1099 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1578 [inline] ieee80211_ibss_rx_queued_mgmt+0x1962/0x2d70 net/mac80211/ibss.c:1605 ieee80211_iface_process_skb net/mac80211/iface.c:1605 [inline] ieee80211_iface_work+0x8a3/0xf10 net/mac80211/iface.c:1659 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437 page last free pid 5100 tgid 5100 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 __slab_free+0x31b/0x3d0 mm/slub.c:4192 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x1e2/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822 tomoyo_path_rmdir+0xd0/0x110 security/tomoyo/tomoyo.c:195 security_path_rmdir+0xe1/0x140 security/security.c:1841 do_rmdir+0x2e7/0x580 fs/namei.c:4262 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4435 [inline] __x64_sys_unlinkat+0xe0/0xf0 fs/namei.c:4435 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88801d300180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801d300200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801d300280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801d300300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801d300380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================