================================================================== BUG: KCSAN: data-race in filemap_read / generic_write_end write to 0xffff88810adfc788 of 8 bytes by task 4871 on cpu 1: generic_write_end+0xb4/0x360 ext4_da_write_end+0x4bd/0x630 generic_perform_write+0x253/0x3d0 ext4_buffered_write_iter+0x234/0x3e0 ext4_file_write_iter+0x2d2/0x1270 vfs_write+0x45a/0x750 ksys_write+0xeb/0x1a0 __x64_sys_write+0x42/0x50 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88810adfc788 of 8 bytes by task 4886 on cpu 0: filemap_read+0x1e2/0x1530 generic_file_read_iter+0x76/0x320 ext4_file_read_iter+0x1cc/0x290 do_iter_read+0x3fd/0x6d0 do_preadv+0x159/0x230 __x64_sys_preadv+0x58/0x60 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x000000000038c000 -> 0x000000000038f000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4886 Comm: syz-executor.3 Not tainted 6.2.0-rc7-syzkaller-00013-g513c1a3d3f19-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 ==================================================================