================================================================== BUG: KASAN: use-after-free in class_equal+0x40/0x50 kernel/locking/lockdep.c:1527 Read of size 8 at addr ffff88807a3f6670 by task syz-executor.2/9252 CPU: 1 PID: 9252 Comm: syz-executor.2 Not tainted 5.2.0-rc5+ #43 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: The buggy address belongs to the page: page:ffffea0001e8fd80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x1fffc0000000000() raw: 01fffc0000000000 0000000000000000 ffffea0001e8fd88 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88807a3f6500: 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ffff88807a3f6580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88807a3f6600: f1 f1 f1 f1 00 f2 f2 f2 00 f2 f2 f2 ff ff ff ff ^ ffff88807a3f6680: 00 00 00 f3 f3 f3 f3 f3 ff ff ff ff ff ff ff ff ffff88807a3f6700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 ================================================================== Kernel panic - not syncing: panic_on_warn set ... Kernel Offset: disabled