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BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: null-ptr-deref in page_ref_count include/linux/page_ref.h:67 [inline]
BUG: KASAN: null-ptr-deref in put_page_testzero include/linux/mm.h:996 [inline]
BUG: KASAN: null-ptr-deref in folio_put_testzero include/linux/mm.h:1002 [inline]
BUG: KASAN: null-ptr-deref in folio_put include/linux/mm.h:1429 [inline]
BUG: KASAN: null-ptr-deref in filemap_fault+0x544/0x24a0 mm/filemap.c:3382
Read of size 4 at addr 0000000000000032 by task syz-executor.1/5255

CPU: 0 PID: 5255 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-13294-g418d5c98319f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_report mm/kasan/report.c:465 [inline]
 kasan_report+0xec/0x130 mm/kasan/report.c:572
 check_region_inline mm/kasan/generic.c:181 [inline]
 kasan_check_range+0x141/0x190 mm/kasan/generic.c:187
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 page_ref_count include/linux/page_ref.h:67 [inline]
 put_page_testzero include/linux/mm.h:996 [inline]
 folio_put_testzero include/linux/mm.h:1002 [inline]
 folio_put include/linux/mm.h:1429 [inline]
 filemap_fault+0x544/0x24a0 mm/filemap.c:3382
 __do_fault+0x107/0x600 mm/memory.c:4176
 do_read_fault mm/memory.c:4530 [inline]
 do_fault mm/memory.c:4659 [inline]
 do_pte_missing mm/memory.c:3647 [inline]
 handle_pte_fault mm/memory.c:4947 [inline]
 __handle_mm_fault+0x28bc/0x41c0 mm/memory.c:5089
 handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
 do_user_addr_fault+0x51a/0x1210 arch/x86/mm/fault.c:1440
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f8ffb6a21fb
Code: b9 cd cc cc cc cc cc cc cc 66 0f 1f 44 00 00 48 89 f8 48 89 f9 49 83 e8 01 49 f7 e1 48 c1 ea 03 48 8d 04 92 48 01 c0 48 29 c1 <0f> b6 04 0e 41 88 00 48 89 f8 48 89 d7 48 83 f8 09 77 d2 4c 89 c0
RSP: 002b:00007ffeb5ad5668 EFLAGS: 00010206
RAX: 0000000000000186 RBX: 0000000000000000 RCX: 0000000000000009
RDX: 0000000000000027 RSI: 00007f8ffb70e820 RDI: 000000000000018f
RBP: 00007ffeb5ad5bc0 R08: 00007ffeb5ad5b87 R09: cccccccccccccccd
R10: 0000000000000000 R11: 0000000000000000 R12: 00007ffeb5ad5bd0
R13: 00007f8ffb6e7c6d R14: 00007ffeb5ad5d10 R15: 0000000000000064
 </TASK>
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