================================================================== BUG: KCSAN: data-race in __delete_from_page_cache / shmem_getpage_gfp write to 0xffff8881295b4770 of 8 bytes by task 11425 on cpu 1: page_cache_delete mm/filemap.c:145 [inline] __delete_from_page_cache+0x1c1/0x260 mm/filemap.c:230 __remove_mapping+0x31c/0x3f0 mm/vmscan.c:1128 shrink_page_list+0x12b8/0x21e0 mm/vmscan.c:1634 reclaim_pages+0x468/0x630 mm/vmscan.c:2360 madvise_cold_or_pageout_pte_range+0x646/0x690 mm/madvise.c:475 walk_pmd_range mm/pagewalk.c:128 [inline] walk_pud_range mm/pagewalk.c:205 [inline] walk_p4d_range mm/pagewalk.c:240 [inline] walk_pgd_range mm/pagewalk.c:277 [inline] __walk_page_range+0x93f/0x10e0 mm/pagewalk.c:379 walk_page_range+0x111/0x2e0 mm/pagewalk.c:475 madvise_pageout_page_range mm/madvise.c:528 [inline] madvise_pageout mm/madvise.c:565 [inline] madvise_vma mm/madvise.c:993 [inline] do_madvise+0x973/0x10a0 mm/madvise.c:1201 __do_sys_madvise mm/madvise.c:1227 [inline] __se_sys_madvise mm/madvise.c:1225 [inline] __x64_sys_madvise+0x5d/0x70 mm/madvise.c:1225 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881295b4770 of 8 bytes by task 11418 on cpu 0: shmem_recalc_inode mm/shmem.c:367 [inline] shmem_getpage_gfp+0xfca/0x13d0 mm/shmem.c:1949 shmem_fault+0x16d/0x500 mm/shmem.c:2126 __do_fault mm/memory.c:3857 [inline] do_read_fault mm/memory.c:4172 [inline] do_fault mm/memory.c:4300 [inline] handle_pte_fault mm/memory.c:4558 [inline] __handle_mm_fault mm/memory.c:4693 [inline] handle_mm_fault+0xe6d/0x1a50 mm/memory.c:4791 faultin_page mm/gup.c:951 [inline] __get_user_pages+0x32b/0xbc0 mm/gup.c:1173 populate_vma_page_range mm/gup.c:1506 [inline] __mm_populate+0x24d/0x380 mm/gup.c:1615 mm_populate include/linux/mm.h:2623 [inline] vm_mmap_pgoff+0x142/0x1d0 mm/util.c:524 ksys_mmap_pgoff+0xe1/0x380 mm/mmap.c:1635 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000000006d5 -> 0x00000000000006d3 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11418 Comm: syz-executor.3 Tainted: G W 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================