================================================================== BUG: KCSAN: data-race in __delete_from_page_cache / shmem_getpage_gfp write to 0xffff88813351abd0 of 8 bytes by task 17626 on cpu 0: page_cache_delete mm/filemap.c:146 [inline] __delete_from_page_cache+0x1e1/0x2c0 mm/filemap.c:231 __remove_mapping+0x336/0x3f0 mm/vmscan.c:1189 shrink_page_list+0x1508/0x2620 mm/vmscan.c:1761 reclaim_pages+0x478/0x640 mm/vmscan.c:2498 madvise_cold_or_pageout_pte_range+0x63f/0x680 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+0x981/0x1160 mm/pagewalk.c:379 walk_page_range+0x131/0x300 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+0xa0b/0x1140 mm/madvise.c:1202 __do_sys_madvise mm/madvise.c:1228 [inline] __se_sys_madvise mm/madvise.c:1226 [inline] __x64_sys_madvise+0x5d/0x70 mm/madvise.c:1226 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88813351abd0 of 8 bytes by task 18322 on cpu 1: shmem_recalc_inode mm/shmem.c:363 [inline] shmem_getpage_gfp+0xfd2/0x1380 mm/shmem.c:1947 shmem_fault+0xd1/0x3c0 mm/shmem.c:2115 __do_fault mm/memory.c:3859 [inline] do_read_fault mm/memory.c:4183 [inline] do_fault mm/memory.c:4312 [inline] handle_pte_fault mm/memory.c:4570 [inline] __handle_mm_fault mm/memory.c:4705 [inline] handle_mm_fault+0xba6/0x1590 mm/memory.c:4803 faultin_page mm/gup.c:939 [inline] __get_user_pages+0x388/0xc80 mm/gup.c:1160 populate_vma_page_range mm/gup.c:1492 [inline] __mm_populate+0x24d/0x370 mm/gup.c:1601 mm_populate include/linux/mm.h:2753 [inline] vm_mmap_pgoff+0x160/0x1f0 mm/util.c:524 ksys_mmap_pgoff+0xcf/0x350 mm/mmap.c:1624 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x000000000000088d -> 0x000000000000088b Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 18322 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================