================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping read to 0xffffea0004144f98 of 8 bytes by task 11458 on cpu 0: page_mapping+0x185/0x2a0 mm/util.c:675 page_evictable+0x3a/0x110 mm/vmscan.c:4313 move_pages_to_lru+0xed/0xa40 mm/vmscan.c:1855 shrink_inactive_list+0x4c7/0x920 mm/vmscan.c:1971 shrink_list mm/vmscan.c:2178 [inline] shrink_lruvec+0x4c8/0xd20 mm/vmscan.c:2496 shrink_node_memcgs mm/vmscan.c:2685 [inline] shrink_node+0x2fe/0xfe0 mm/vmscan.c:2791 shrink_zones mm/vmscan.c:2996 [inline] do_try_to_free_pages+0x245/0xb60 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x205/0x4d0 mm/vmscan.c:3371 reclaim_high.constprop.0+0xf7/0x140 mm/memcontrol.c:2232 mem_cgroup_handle_over_high+0x96/0x180 mm/memcontrol.c:2313 tracehook_notify_resume include/linux/tracehook.h:197 [inline] exit_to_usermode_loop+0x20c/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffffea0004144f98 of 8 bytes by task 11473 on cpu 1: page_cache_delete_batch mm/filemap.c:326 [inline] delete_from_page_cache_batch+0x674/0x790 mm/filemap.c:357 truncate_inode_pages_range+0x593/0x1120 mm/truncate.c:366 truncate_inode_pages mm/truncate.c:476 [inline] truncate_pagecache+0x60/0x80 mm/truncate.c:817 ext4_setattr+0xbd6/0x1670 fs/ext4/inode.c:5327 notify_change+0x7e1/0xaa0 fs/attr.c:337 do_truncate+0xfb/0x180 fs/open.c:64 handle_truncate fs/namei.c:3015 [inline] do_last fs/namei.c:3426 [inline] path_openat+0x13e8/0x3580 fs/namei.c:3537 do_filp_open+0x11e/0x1b0 fs/namei.c:3567 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 ksys_open include/linux/syscalls.h:1385 [inline] __do_sys_creat fs/open.c:1155 [inline] __se_sys_creat fs/open.c:1153 [inline] __x64_sys_creat+0x45/0x60 fs/open.c:1153 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11473 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================