BTRFS info (device loop1): enabling ssd optimizations BTRFS info (device loop1): using spread ssd allocation scheme BTRFS info (device loop1): turning on sync discard BTRFS info (device loop1): using free space tree ================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff888020e0db60 by task syz-executor.1/7765 CPU: 1 PID: 7765 Comm: syz-executor.1 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:2193 [inline] open_ctree+0x156c/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: 0033:0x7f51ca28d62a 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:00007f51cb07af88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000055a8 RCX: 00007f51ca28d62a RDX: 00000000200055c0 RSI: 0000000020005600 RDI: 00007f51cb07afe0 RBP: 00007f51cb07b020 R08: 00007f51cb07b020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200055c0 R13: 0000000020005600 R14: 00007f51cb07afe0 R15: 00000000200013c0 Allocated by task 5195: 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:3554 [inline] skb_cow_head include/linux/skbuff.h:3588 [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 5195: 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 The buggy address belongs to the object at ffff888020e0d800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff888020e0d800, ffff888020e0dc00) The buggy address belongs to the physical page: page:ffffea0000838200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888020e0c800 pfn:0x20e08 head:ffffea0000838200 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 ffffea0000d72210 ffffea0000dd3610 raw: ffff888020e0c800 000000000010000c 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5124, tgid 5124 (syz-executor.3), ts 363408037205, free_ts 363106378221 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+0x51/0x1a0 mm/slab_common.c:973 kmalloc_node include/linux/slab.h:579 [inline] kzalloc_node include/linux/slab.h:691 [inline] qdisc_alloc+0xb0/0xb30 net/sched/sch_generic.c:938 qdisc_create_dflt+0x75/0x3f0 net/sched/sch_generic.c:996 attach_one_default_qdisc net/sched/sch_generic.c:1151 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2509 [inline] attach_default_qdiscs net/sched/sch_generic.c:1169 [inline] dev_activate+0x803/0x1380 net/sched/sch_generic.c:1228 __dev_open+0x393/0x4d0 net/core/dev.c:1426 __dev_change_flags+0x587/0x750 net/core/dev.c:8527 dev_change_flags+0x97/0x170 net/core/dev.c:8599 do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836 __rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3626 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 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] kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3497 __alloc_skb+0x288/0x330 net/core/skbuff.c:594 alloc_skb include/linux/skbuff.h:1269 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1211 [inline] netlink_sendmsg+0x9b0/0xe30 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 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 Memory state around the buggy address: ffff888020e0da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888020e0da80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888020e0db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888020e0db80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888020e0dc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================