BTRFS: device fsid a6a605fc-d5f1-4e66-8595-3726e2b761d6 devid 1 transid 8 /dev/loop3 scanned by syz-executor.3 (13791) BTRFS info (device loop3): using blake2b (blake2b-256-generic) checksum algorithm BTRFS info (device loop3): turning on sync discard BTRFS info (device loop3): using free space tree ================================================================== BUG: KASAN: slab-out-of-bounds in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff88803c69e360 by task syz-executor.3/13791 CPU: 0 PID: 13791 Comm: syz-executor.3 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 btrfs_alloc_workqueue+0x19d/0x540 fs/btrfs/async-thread.c:102 btrfs_init_workqueues fs/btrfs/disk-io.c:2219 [inline] open_ctree+0x1823/0x5320 fs/btrfs/disk-io.c:3498 btrfs_fill_super fs/btrfs/super.c:1152 [inline] btrfs_mount_root+0xa49/0xdb0 fs/btrfs/super.c:1521 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 fc_mount fs/namespace.c:1035 [inline] vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1065 vfs_kern_mount+0x40/0x60 fs/namespace.c:1052 btrfs_mount+0x23f/0xb20 fs/btrfs/super.c:1581 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 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: 0033:0x7f468908d62a 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:00007f4689ebbf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000559d RCX: 00007f468908d62a RDX: 00000000200055c0 RSI: 0000000020005600 RDI: 00007f4689ebbfe0 RBP: 00007f4689ebc020 R08: 00007f4689ebc020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200055c0 R13: 0000000020005600 R14: 00007f4689ebbfe0 R15: 0000000020000440 Allocated by task 30591: 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+0x61/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:604 kvmalloc include/linux/slab.h:697 [inline] kvzalloc include/linux/slab.h:705 [inline] bucket_table_alloc.isra.0+0x8c/0x480 lib/rhashtable.c:184 rhashtable_init+0x38b/0x7e0 lib/rhashtable.c:1065 br_mdb_hash_init+0x5c/0x80 net/bridge/br_multicast.c:5106 br_dev_init+0xdb/0x450 net/bridge/br_device.c:132 register_netdevice+0x573/0x1640 net/core/dev.c:9976 br_dev_newlink+0x27/0x110 net/bridge/br_netlink.c:1534 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 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 Second to 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 put_css_set_locked kernel/cgroup/cgroup.c:995 [inline] put_css_set_locked+0xad9/0x1080 kernel/cgroup/cgroup.c:961 cgroup_migrate_finish+0x189/0x650 kernel/cgroup/cgroup.c:2723 cgroup_attach_task+0x44a/0x790 kernel/cgroup/cgroup.c:2922 cgroup_attach_task_all+0xe0/0x140 kernel/cgroup/cgroup-v1.c:70 kvm_vm_worker_thread+0x306/0x660 arch/x86/kvm/../../../virt/kvm/kvm_main.c:6143 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 ffff88803c69e000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 224 bytes to the right of allocated 640-byte region [ffff88803c69e000, ffff88803c69e280) The buggy address belongs to the physical page: page:ffffea0000f1a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3c698 head:ffffea0000f1a600 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 0x1f2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_MEMALLOC|__GFP_HARDWALL), pid 12, tgid 12 (kworker/u4:1), ts 239019493303, 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_node_track_caller+0x4f/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+0x9b2/0x1520 net/batman-adv/bat_iv_ogm.c:833 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 page_owner free stack trace missing Memory state around the buggy address: ffff88803c69e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803c69e280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803c69e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88803c69e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803c69e400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================