================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:193 [inline] BUG: KASAN: use-after-free in lockdep_register_key+0x3b9/0x490 kernel/locking/lockdep.c:1023 Read of size 8 at addr ffff8880882701d8 by task syz-executor.5/28039 CPU: 0 PID: 28039 Comm: syz-executor.5 Not tainted 5.0.0+ #11 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __read_once_size include/linux/compiler.h:193 [inline] lockdep_register_key+0x3b9/0x490 kernel/locking/lockdep.c:1023 wq_init_lockdep kernel/workqueue.c:3434 [inline] alloc_workqueue+0x427/0xe70 kernel/workqueue.c:4253 xfs_init_mount_workqueues+0x19c/0x660 fs/xfs/xfs_super.c:851 xfs_fs_fill_super+0x749/0x1670 fs/xfs/xfs_super.c:1658 mount_bdev+0x307/0x3c0 fs/super.c:1159 xfs_fs_mount+0x35/0x40 fs/xfs/xfs_super.c:1834 mount_fs+0x106/0x3ff fs/super.c:1258 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x581/0x2d30 fs/namespace.c:2845 ksys_mount+0xdb/0x150 fs/namespace.c:3061 __do_sys_mount fs/namespace.c:3075 [inline] __se_sys_mount fs/namespace.c:3072 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3072 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a99a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d 8e fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0a 8e fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f1de3330a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1de3330b30 RCX: 000000000045a99a RDX: 00007f1de3330ad0 RSI: 0000000020000080 RDI: 00007f1de3330af0 RBP: 0000000020000080 R08: 00007f1de3330b30 R09: 00007f1de3330ad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000004dbee0 R15: 00000000ffffffff Allocated by task 3870: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3621 kmalloc include/linux/slab.h:545 [inline] kzalloc include/linux/slab.h:740 [inline] kernfs_fop_open+0x2ac/0xd90 fs/kernfs/file.c:648 do_dentry_open+0x488/0x1160 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x10e9/0x46e0 fs/namei.c:3534 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_sys_open+0x3fe/0x5d0 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 3870: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459 kasan_slab_free+0xe/0x10 mm/kasan/common.c:467 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3821 kernfs_fop_release+0x129/0x1a0 fs/kernfs/file.c:783 __fput+0x2df/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880882700c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 280 bytes inside of 512-byte region [ffff8880882700c0, ffff8880882702c0) The buggy address belongs to the page: page:ffffea0002209c00 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0xffff888088270d40 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea000258fb88 ffffea0002907e08 ffff88812c3f0940 raw: ffff888088270d40 ffff8880882700c0 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888088270080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff888088270100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888088270180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888088270200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888088270280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================