==================================================================
BUG: KASAN: user-memory-access in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
BUG: KASAN: user-memory-access in page_ref_count include/linux/page_ref.h:67 [inline]
BUG: KASAN: user-memory-access in put_page_testzero include/linux/mm.h:675 [inline]
BUG: KASAN: user-memory-access in put_page+0x110/0x1d0 include/linux/mm.h:1136
Read of size 4 at addr 00003fbf7e8680b0 by task syz-executor.1/30247

CPU: 0 PID: 30247 Comm: syz-executor.1 Not tainted 5.6.0-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+0x1e9/0x30e lib/dump_stack.c:118
 __kasan_report+0x122/0x190 mm/kasan/report.c:507
 kasan_report+0x4d/0x80 mm/kasan/common.c:648
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 30247 Comm: syz-executor.1 Tainted: G    B             5.6.0-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+0x1e9/0x30e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:221
 end_report mm/kasan/report.c:96 [inline]
 __kasan_report+0x187/0x190 mm/kasan/report.c:510
 kasan_report+0x4d/0x80 mm/kasan/common.c:648
Kernel Offset: disabled
Rebooting in 86400 seconds..