================================================================== BUG: KASAN: global-out-of-bounds in instrument_atomic_read include/linux/instrumented.h:56 [inline] BUG: KASAN: global-out-of-bounds in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: global-out-of-bounds in __lock_acquire+0xfbe/0x5640 kernel/locking/lockdep.c:4396 Read of size 8 at addr ffffffff8860c2d8 by task kworker/0:7/8669 CPU: 0 PID: 8669 Comm: kworker/0:7 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events l2cap_chan_timeout Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 instrument_atomic_read include/linux/instrumented.h:56 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] __lock_acquire+0xfbe/0x5640 kernel/locking/lockdep.c:4396 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x3b/0x110 net/core/sock.c:3034 l2cap_sock_teardown_cb+0x88/0x400 net/bluetooth/l2cap_sock.c:1520 l2cap_chan_del+0xad/0x1300 net/bluetooth/l2cap_core.c:618 l2cap_chan_close+0x118/0xb10 net/bluetooth/l2cap_core.c:823 l2cap_chan_timeout+0x173/0x450 net/bluetooth/l2cap_core.c:436 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 The buggy address belongs to the variable: clumptbl+0x1158/0x1460 Memory state around the buggy address: ffffffff8860c180: 00 00 00 00 00 00 06 f9 f9 f9 f9 f9 00 00 00 00 ffffffff8860c200: 00 02 f9 f9 f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 >ffffffff8860c280: 00 00 00 00 01 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 ^ ffffffff8860c300: 07 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 03 f9 f9 f9 ffffffff8860c380: f9 f9 f9 f9 00 00 00 00 06 f9 f9 f9 f9 f9 f9 f9 ==================================================================