==================================================================
BUG: KASAN: out-of-bounds in arch_end_context_switch arch/x86/include/asm/paravirt.h:625 [inline]
BUG: KASAN: out-of-bounds in __switch_to+0xddc/0xfe0 arch/x86/kernel/process_64.c:566
Read of size 8 at addr ffffffff89fc6bd8 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

The buggy address belongs to the variable:
 pv_ops+0x118/0x2c0

Memory state around the buggy address:
 ffffffff89fc6a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff89fc6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff89fc6b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                       ^
 ffffffff89fc6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff89fc6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G    B             5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
Kernel Offset: disabled
Rebooting in 86400 seconds..