================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping write to 0xffffea0004340218 of 8 bytes by task 17646 on cpu 0: page_cache_delete_batch mm/filemap.c:325 [inline] delete_from_page_cache_batch+0x674/0x790 mm/filemap.c:356 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:805 ext4_setattr+0xdfc/0x1620 fs/ext4/inode.c:5659 notify_change+0x7e1/0xaa0 fs/attr.c:337 do_truncate+0xfb/0x180 fs/open.c:64 handle_truncate fs/namei.c:2998 [inline] do_last fs/namei.c:3414 [inline] path_openat+0x2f4a/0x36e0 fs/namei.c:3525 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_openat fs/open.c:1124 [inline] __se_sys_openat fs/open.c:1118 [inline] __x64_sys_openat+0x62/0x80 fs/open.c:1118 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea0004340218 of 8 bytes by task 17645 on cpu 1: page_mapping+0x185/0x2a0 mm/util.c:665 page_evictable+0x3a/0x100 mm/vmscan.c:4323 move_pages_to_lru+0xf1/0xac0 mm/vmscan.c:1892 shrink_inactive_list+0x4c7/0x920 mm/vmscan.c:2008 shrink_list mm/vmscan.c:2287 [inline] shrink_node_memcg+0x55c/0xf80 mm/vmscan.c:2605 shrink_node+0x164/0xb30 mm/vmscan.c:2810 shrink_zones mm/vmscan.c:3027 [inline] do_try_to_free_pages+0x242/0x940 mm/vmscan.c:3085 try_to_free_mem_cgroup_pages+0x1fd/0x4c0 mm/vmscan.c:3385 reclaim_high.constprop.0+0xf7/0x140 mm/memcontrol.c:2349 mem_cgroup_handle_over_high+0x96/0x180 mm/memcontrol.c:2430 tracehook_notify_resume include/linux/tracehook.h:197 [inline] exit_to_usermode_loop+0x20c/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x353/0x370 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17645 Comm: syz-executor.0 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================