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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:1033 [inline]
BUG: KASAN: null-ptr-deref in folio_put_testzero include/linux/mm.h:1039 [inline]
BUG: KASAN: null-ptr-deref in folio_put include/linux/mm.h:1466 [inline]
BUG: KASAN: null-ptr-deref in filemap_fault+0x544/0x24a0 mm/filemap.c:3380
Read of size 4 at addr 0000000000000032 by task syz-executor.1/12709

CPU: 1 PID: 12709 Comm: syz-executor.1 Not tainted 6.3.0-rc4-next-20230329-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023
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:1033 [inline]
 folio_put_testzero include/linux/mm.h:1039 [inline]
 folio_put include/linux/mm.h:1466 [inline]
 filemap_fault+0x544/0x24a0 mm/filemap.c:3380
 __do_fault+0x107/0x600 mm/memory.c:4163
 do_shared_fault mm/memory.c:4572 [inline]
 do_fault mm/memory.c:4650 [inline]
 do_pte_missing mm/memory.c:3634 [inline]
 handle_pte_fault mm/memory.c:4934 [inline]
 __handle_mm_fault+0x241a/0x4180 mm/memory.c:5076
 handle_mm_fault+0x2c0/0x9c0 mm/memory.c:5222
 do_user_addr_fault+0x53d/0x1240 arch/x86/mm/fault.c:1462
 handle_page_fault arch/x86/mm/fault.c:1556 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1612
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f8ffe486c55
Code: 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 48 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 <89> 4c 17 fc 89 37 c3 0f b7 4c 16 fe 0f b7 36 66 89 4c 17 fe 66 89
RSP: 002b:00007ffda31e3938 EFLAGS: 00010202
RAX: 0000000020001080 RBX: 0000000000000000 RCX: 0000000000737562
RDX: 0000000000000006 RSI: 0000000075622f2e RDI: 0000000020001080
RBP: 00007ffda31e39f8 R08: 00007f8ffe400000 R09: 00007f8ffe000000
R10: 00007f8ffe0003b8 R11: 0000000000000246 R12: 000000000012f92a
R13: 00007ffda31e3a20 R14: 00007f8ffe5abf80 R15: 0000000000000032
 </TASK>
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