BTRFS info (device loop2): force zlib compression, level 3 BTRFS info (device loop2): allowing degraded mounts BTRFS info (device loop2): 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 ffff888036cc1360 by task syz-executor.2/18382 CPU: 0 PID: 18382 Comm: syz-executor.2 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:2213 [inline] open_ctree+0x1796/0x5320 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: 0033:0x7f4cb088d62a 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:00007f4cb1546f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000050ef RCX: 00007f4cb088d62a RDX: 0000000020005100 RSI: 0000000020000000 RDI: 00007f4cb1546fe0 RBP: 00007f4cb1547020 R08: 00007f4cb1547020 R09: 0000000000000080 R10: 0000000000000080 R11: 0000000000000202 R12: 0000000020005100 R13: 0000000020000000 R14: 00007f4cb1546fe0 R15: 0000000020000040 Allocated by task 18365: 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+0x5e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] load_elf_phdrs+0x103/0x210 fs/binfmt_elf.c:486 load_elf_binary+0x17f0/0x4ff0 fs/binfmt_elf.c:960 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1778 [inline] bprm_execve fs/exec.c:1853 [inline] bprm_execve+0x7fd/0x1980 fs/exec.c:1809 do_execveat_common+0x72c/0x8e0 fs/exec.c:1960 do_execve fs/exec.c:2034 [inline] __do_sys_execve fs/exec.c:2110 [inline] __se_sys_execve fs/exec.c:2105 [inline] __x64_sys_execve+0x93/0xc0 fs/exec.c:2105 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 Freed by task 18365: 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 load_elf_binary+0x2085/0x4ff0 fs/binfmt_elf.c:1272 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1778 [inline] bprm_execve fs/exec.c:1853 [inline] bprm_execve+0x7fd/0x1980 fs/exec.c:1809 do_execveat_common+0x72c/0x8e0 fs/exec.c:1960 do_execve fs/exec.c:2034 [inline] __do_sys_execve fs/exec.c:2110 [inline] __se_sys_execve fs/exec.c:2105 [inline] __x64_sys_execve+0x93/0xc0 fs/exec.c:2105 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 __call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637 pwq_unbound_release_workfn+0x26b/0x340 kernel/workqueue.c:3864 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 ffff888036cc1000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff888036cc1000, ffff888036cc1400) The buggy address belongs to the physical page: page:ffffea0000db3000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x36cc0 head:ffffea0000db3000 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5131, tgid 5131 (syz-executor.1), ts 270081015525, 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 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] afs_alloc_call+0x51/0x3b0 fs/afs/rxrpc.c:143 afs_charge_preallocation+0xed/0x310 fs/afs/rxrpc.c:729 afs_open_socket+0x298/0x360 fs/afs/rxrpc.c:94 afs_net_init+0x990/0xc90 fs/afs/main.c:126 ops_init+0xb9/0x6b0 net/core/net_namespace.c:136 setup_net+0x5d1/0xc50 net/core/net_namespace.c:339 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 page_owner free stack trace missing Memory state around the buggy address: ffff888036cc1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036cc1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888036cc1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888036cc1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036cc1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================