================================================================== BUG: KCSAN: data-race in __delete_from_page_cache / ext4_writepages write to 0xffff8880b60f8380 of 8 bytes by task 12119 on cpu 1: page_cache_delete mm/filemap.c:153 [inline] __delete_from_page_cache+0x25f/0x360 mm/filemap.c:238 invalidate_complete_page2+0x11f/0x280 mm/truncate.c:651 invalidate_inode_pages2_range+0x451/0x770 mm/truncate.c:744 iomap_dio_rw+0x3ff/0x8c0 fs/iomap/direct-io.c:484 ext4_dio_write_iter fs/ext4/file.c:545 [inline] ext4_file_write_iter+0xd61/0xfd0 fs/ext4/file.c:653 call_write_iter include/linux/fs.h:1907 [inline] do_iter_readv_writev+0x321/0x3c0 fs/read_write.c:694 do_iter_write+0x10e/0x470 fs/read_write.c:999 vfs_iter_write+0x4c/0x70 fs/read_write.c:1040 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x562/0xb10 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1582 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1568 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880b60f8380 of 8 bytes by task 12124 on cpu 0: ext4_writepages+0x132/0x1cb0 fs/ext4/inode.c:2650 do_writepages+0x7b/0x150 mm/page-writeback.c:2354 __filemap_fdatawrite_range+0x19b/0x1d0 mm/filemap.c:421 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:760 ext4_sync_file+0xe2/0x680 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2884 [inline] ext4_buffered_write_iter+0x34e/0x390 fs/ext4/file.c:277 ext4_file_write_iter+0x4a3/0xfd0 fs/ext4/file.c:498 call_write_iter include/linux/fs.h:1907 [inline] do_iter_readv_writev+0x321/0x3c0 fs/read_write.c:694 do_iter_write+0x10e/0x470 fs/read_write.c:999 vfs_iter_write+0x4c/0x70 fs/read_write.c:1040 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x562/0xb10 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1576 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1568 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12124 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================