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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.1/22899

CPU: 0 PID: 22899 Comm: syz-executor.1 Not tainted 6.3.0-rc5-next-20230406-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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:4177
 do_read_fault mm/memory.c:4531 [inline]
 do_fault mm/memory.c:4660 [inline]
 do_pte_missing mm/memory.c:3648 [inline]
 handle_pte_fault mm/memory.c:4948 [inline]
 __handle_mm_fault+0x24a1/0x3b80 mm/memory.c:5090
 handle_mm_fault+0x2c0/0x9c0 mm/memory.c:5236
 faultin_page mm/gup.c:925 [inline]
 __get_user_pages+0x614/0x10e0 mm/gup.c:1147
 populate_vma_page_range+0x2df/0x420 mm/gup.c:1543
 __mm_populate+0x105/0x3b0 mm/gup.c:1652
 mm_populate include/linux/mm.h:3192 [inline]
 vm_mmap_pgoff+0x2c6/0x3b0 mm/util.c:548
 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1439
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f274888c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f27495b1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f27489abf80 RCX: 00007f274888c169
RDX: 00000000007ffffe RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007f27488e7ca1 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000004002011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0b7c234f R14: 00007f27495b1300 R15: 0000000000022000
 </TASK>
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