SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=24046 comm=syz-executor.0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=24046 comm=syz-executor.0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=24046 comm=syz-executor.0
==================================================================
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x169f/0x1810 arch/x86/kernel/unwind_orc.c:470
Read of size 8 at addr ffff88816b4073a8 by task syz-executor.5/24078

CPU: 1 PID: 24078 Comm: syz-executor.5 Not tainted 4.14.156-syzkaller #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe5/0x154 lib/dump_stack.c:58
 print_address_description+0x60/0x226 mm/kasan/report.c:187
 __kasan_report.cold+0x1a/0x41 mm/kasan/report.c:316
 unwind_next_frame+0x169f/0x1810 arch/x86/kernel/unwind_orc.c:470
 perf_callchain_kernel+0x3a0/0x540 arch/x86/events/core.c:2338
 get_perf_callchain+0x2f5/0x770 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0x6a8/0x1360 kernel/events/core.c:6149
 __perf_event_output kernel/events/core.c:6265 [inline]
 perf_event_output_forward+0xdc/0x220 kernel/events/core.c:6283
 __perf_event_overflow+0x12d/0x340 kernel/events/core.c:7541
 perf_swevent_overflow+0x7a/0xf0 kernel/events/core.c:7617
 perf_swevent_event+0x112/0x270 kernel/events/core.c:7655
 perf_tp_event+0x633/0x7f0 kernel/events/core.c:8079
 perf_trace_run_bpf_submit kernel/events/core.c:8049 [inline]
 perf_trace_run_bpf_submit+0x113/0x170 kernel/events/core.c:8035
 perf_trace_lock_acquire+0x341/0x4e0 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x279/0x360 kernel/locking/lockdep.c:3993
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:629 [inline]
 __is_insn_slot_addr+0x3d/0x1e0 kernel/kprobes.c:293
 is_kprobe_optinsn_slot include/linux/kprobes.h:345 [inline]
 kernel_text_address+0x75/0x120 kernel/extable.c:148
 __kernel_text_address+0x9/0x30 kernel/extable.c:105
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:255 [inline]
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:250
 __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:45
 save_stack mm/kasan/common.c:76 [inline]
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x164/0x210 mm/kasan/common.c:463
 slab_free_hook mm/slub.c:1407 [inline]
 slab_free_freelist_hook mm/slub.c:1458 [inline]
 slab_free mm/slub.c:3039 [inline]
 kmem_cache_free+0xd7/0x3b0 mm/slub.c:3055
 free_buffer_head+0x42/0xa0 fs/buffer.c:3440
 try_to_free_buffers+0x1cd/0x2b0 fs/buffer.c:3355
 ext4_releasepage+0x21a/0x430 fs/ext4/inode.c:3435
 try_to_release_page+0x163/0x200 mm/filemap.c:3321
 invalidate_complete_page2 mm/truncate.c:582 [inline]
 invalidate_inode_pages2_range+0x76d/0x980 mm/truncate.c:687
 generic_file_direct_write+0x17a/0x430 mm/filemap.c:3024
 __generic_file_write_iter+0x209/0x550 mm/filemap.c:3215
 ext4_file_write_iter+0x58f/0xdb0 fs/ext4/file.c:268
 call_write_iter include/linux/fs.h:1798 [inline]
 new_sync_write fs/read_write.c:471 [inline]
 __vfs_write+0x401/0x5a0 fs/read_write.c:484
 vfs_write+0x17f/0x4d0 fs/read_write.c:546
 SYSC_write fs/read_write.c:594 [inline]
 SyS_write+0x102/0x250 fs/read_write.c:586
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007f29b1ccdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 00000000175d900f RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f29b1cce6d4
R13: 00000000004cb1ff R14: 00000000004e3fe8 R15: 00000000ffffffff

The buggy address belongs to the page:
page:ffffea0005ad01c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 dead000000000200 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88816b407280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88816b407300: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffff88816b407380: f1 f1 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 00
                                  ^
 ffff88816b407400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88816b407480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================