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BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:378 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x19b9/0x1f90 arch/x86/kernel/unwind_orc.c:551
Read of size 8 at addr ffffc900156afd30 by task syz-executor.4/9129

CPU: 1 PID: 9129 Comm: syz-executor.4 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fb lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
 deref_stack_regs arch/x86/kernel/unwind_orc.c:378 [inline]
 unwind_next_frame+0x19b9/0x1f90 arch/x86/kernel/unwind_orc.c:551
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save_tsk+0x175/0x210 kernel/stacktrace.c:149
 proc_pid_stack+0x166/0x2a0 fs/proc/base.c:456
 proc_single_show+0x116/0x1e0 fs/proc/base.c:775
 seq_read+0x432/0x1070 fs/seq_file.c:208
 do_loop_readv_writev fs/read_write.c:742 [inline]
 do_loop_readv_writev fs/read_write.c:729 [inline]
 do_iter_read+0x48e/0x6e0 fs/read_write.c:784
 vfs_readv+0xe5/0x150 fs/read_write.c:902
 do_preadv fs/read_write.c:994 [inline]
 __do_sys_preadv fs/read_write.c:1044 [inline]
 __se_sys_preadv fs/read_write.c:1039 [inline]
 __x64_sys_preadv+0x231/0x310 fs/read_write.c:1039
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f157842fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000025dc0 RCX: 000000000045de59
RDX: 0000000000000177 RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000118bf70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fff8392adaf R14: 00007f15784309c0 R15: 000000000118bf2c


Memory state around the buggy address:
 ffffc900156afc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
 ffffc900156afc80: f1 f1 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 f3 f3
>ffffc900156afd00: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                     ^
 ffffc900156afd80: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00
 ffffc900156afe00: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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