XFS (loop1): Invalid superblock magic number
WARNING: can't dereference registers at 1ffff11015d40f8e for ip apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
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BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:311 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:441
Read of size 8 at addr ffff88804d6dfd88 by task syz-executor.4/8891

CPU: 0 PID: 8891 Comm: syz-executor.4 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 deref_stack_regs arch/x86/kernel/unwind_orc.c:311 [inline]
 unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:441
 perf_callchain_kernel+0x38c/0x520 arch/x86/events/core.c:2343
 get_perf_callchain+0x2df/0x740 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0xd77/0x1380 kernel/events/core.c:6162
 __perf_event_output kernel/events/core.c:6278 [inline]
 perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6296
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7541
 perf_swevent_overflow kernel/events/core.c:7617 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7645
 perf_tp_event+0x540/0x6e0 kernel/events/core.c:8079
 perf_trace_run_bpf_submit+0x119/0x200 kernel/events/core.c:8049
 perf_trace_lock+0x2d6/0x490 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x4df/0x870 kernel/locking/lockdep.c:4016
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184
 spin_unlock include/linux/spinlock.h:357 [inline]
 new_inode_pseudo+0x68/0xe0 fs/inode.c:904
 sock_alloc+0x3c/0x270 net/socket.c:569
 __sock_create+0x8a/0x620 net/socket.c:1239
 sock_create net/socket.c:1315 [inline]
 SYSC_socket net/socket.c:1345 [inline]
 SyS_socket+0xd1/0x1b0 net/socket.c:1325
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c369
RSP: 002b:00007f6fa41ddc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000031680 RCX: 000000000045c369
RDX: 0000000000000084 RSI: 0000000000000005 RDI: 000000000000000a
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffc1568c91f R14: 00007f6fa41de9c0 R15: 000000000078bf0c

The buggy address belongs to the page:
page:ffffea000135b7c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88804d6dfc80: 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 f3 f3
 ffff88804d6dfd00: f3 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 04
>ffff88804d6dfd80: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffff88804d6dfe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804d6dfe80: 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00
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