EXT4-fs (loop5): warning: mounting fs with errors, running e2fsck is recommended
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
==================================================================
BUG: KCSAN: data-race in read_pages / read_pages

write to 0xffff8881389b9284 of 4 bytes by task 10091 on cpu 1:
 read_pages+0x291/0x560 mm/readahead.c:172
 page_cache_ra_unbounded+0x223/0x2e0
 do_page_cache_ra mm/readahead.c:299 [inline]
 page_cache_ra_order+0xd5/0xf0 mm/readahead.c:559
 do_sync_mmap_readahead+0x36a/0x3b0 mm/filemap.c:3205
 filemap_fault+0x3d6/0xb70 mm/filemap.c:3297
 __do_fault mm/memory.c:4198 [inline]
 do_read_fault mm/memory.c:4547 [inline]
 do_fault mm/memory.c:4670 [inline]
 do_pte_missing mm/memory.c:3664 [inline]
 handle_pte_fault mm/memory.c:4939 [inline]
 __handle_mm_fault mm/memory.c:5079 [inline]
 handle_mm_fault+0x1224/0x2c10 mm/memory.c:5233
 faultin_page mm/gup.c:963 [inline]
 __get_user_pages+0x42e/0xd20 mm/gup.c:1262
 populate_vma_page_range mm/gup.c:1653 [inline]
 __mm_populate+0x23b/0x360 mm/gup.c:1762
 mm_populate include/linux/mm.h:3213 [inline]
 vm_mmap_pgoff+0x1a3/0x240 mm/util.c:548
 ksys_mmap_pgoff+0x2b8/0x330 mm/mmap.c:1409
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff8881389b9284 of 4 bytes by task 10068 on cpu 0:
 read_pages+0x266/0x560 mm/readahead.c:171
 page_cache_ra_unbounded+0x2a9/0x2e0 mm/readahead.c:269
 do_page_cache_ra mm/readahead.c:299 [inline]
 page_cache_ra_order+0xd5/0xf0 mm/readahead.c:559
 do_sync_mmap_readahead+0x36a/0x3b0 mm/filemap.c:3205
 filemap_fault+0x3d6/0xb70 mm/filemap.c:3297
 __do_fault mm/memory.c:4198 [inline]
 do_read_fault mm/memory.c:4547 [inline]
 do_fault mm/memory.c:4670 [inline]
 do_pte_missing mm/memory.c:3664 [inline]
 handle_pte_fault mm/memory.c:4939 [inline]
 __handle_mm_fault mm/memory.c:5079 [inline]
 handle_mm_fault+0x1224/0x2c10 mm/memory.c:5233
 faultin_page mm/gup.c:963 [inline]
 __get_user_pages+0x42e/0xd20 mm/gup.c:1262
 populate_vma_page_range mm/gup.c:1653 [inline]
 __mm_populate+0x23b/0x360 mm/gup.c:1762
 mm_populate include/linux/mm.h:3213 [inline]
 vm_mmap_pgoff+0x1a3/0x240 mm/util.c:548
 ksys_mmap_pgoff+0x2b8/0x330 mm/mmap.c:1409
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000008 -> 0x00000005

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10068 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
==================================================================