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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.1/16358

CPU: 2 PID: 16358 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-13091-g3c4aa4434377 #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: 0033:0x7fb299630be0
Code: Unable to access opcode bytes at 0x7fb299630bb6.
RSP: 002b:00007fff5b06a478 EFLAGS: 00010206
RAX: 00007fb299200a00 RBX: 00007fff5b06a5f8 RCX: 00007fb299200000
RDX: 0000000000000000 RSI: 00007fb2996e9e89 RDI: 00007fff5b06a538
RBP: 00007fff5b06a538 R08: 00007fb299600000 R09: 0000000000000001
R10: 00007fb2992009e8 R11: 0000000000000246 R12: 00007fff5b06a5d8
R13: 00007fb2992009f0 R14: 00007fb2997abf80 R15: 0000000000000032
 </TASK>
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