BUG: unable to handle page fault for address: fffffbfff353f732
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffe9067 P4D 23ffe9067 PUD 23ffe8067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9718 Comm: kworker/1:6 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline]
RIP: 0010:kasan_check_range+0x80/0x2f0 mm/kasan/generic.c:186
Code: 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 <45> 0f b6 19 45 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9
RSP: 0018:ffffc9000cd475b0 EFLAGS: 00010097
RAX: 00000000015a6401 RBX: ffffffffffffffff RCX: ffffffff81607e57
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9a9fb990
RBP: ffffc9000cd47970 R08: dffffc0000000000 R09: fffffbfff353f732
R10: fffffbfff353f733 R11: 0000000000000000 R12: 1ffffffff353f732
R13: dffffc0000000001 R14: 0000000000000001 R15: ffff888023a826f0
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff353f732 CR3: 0000000019994000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 __lock_acquire+0xe17/0x6040 kernel/locking/lockdep.c:4871
 lock_acquire+0x17f/0x720 kernel/locking/lockdep.c:5511
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x48/0x110 net/core/sock.c:3057
 l2cap_sock_teardown_cb+0x76/0x360 net/bluetooth/l2cap_sock.c:1520
 l2cap_chan_del+0xaf/0x610 net/bluetooth/l2cap_core.c:618
 l2cap_chan_timeout+0x12c/0x280 net/bluetooth/l2cap_core.c:436
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
CR2: fffffbfff353f732
---[ end trace cc7d397893cacf8e ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline]
RIP: 0010:kasan_check_range+0x80/0x2f0 mm/kasan/generic.c:186
Code: 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 <45> 0f b6 19 45 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9
RSP: 0018:ffffc9000cd475b0 EFLAGS: 00010097
RAX: 00000000015a6401 RBX: ffffffffffffffff RCX: ffffffff81607e57
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9a9fb990
RBP: ffffc9000cd47970 R08: dffffc0000000000 R09: fffffbfff353f732
R10: fffffbfff353f733 R11: 0000000000000000 R12: 1ffffffff353f732
R13: dffffc0000000001 R14: 0000000000000001 R15: ffff888023a826f0
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff353f732 CR3: 0000000019994000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400