================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty read to 0xffff888125eff670 of 8 bytes by task 8228 on cpu 1: __mark_inode_dirty+0xb8/0x940 fs/fs-writeback.c:2269 generic_update_time+0x184/0x270 fs/inode.c:1667 update_time fs/inode.c:1683 [inline] file_update_time+0x237/0x300 fs/inode.c:1898 __generic_file_write_iter+0x132/0x380 mm/filemap.c:3383 ext4_file_write_iter+0x1bd/0xa00 fs/ext4/file.c:268 call_write_iter include/linux/fs.h:1895 [inline] do_iter_readv_writev+0x487/0x5b0 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x13b/0x3c0 fs/read_write.c:951 vfs_iter_write+0x5c/0x80 fs/read_write.c:983 iter_file_splice_write+0x4c0/0x7f0 fs/splice.c:746 do_splice_from fs/splice.c:848 [inline] direct_splice_actor+0xa0/0xc0 fs/splice.c:1020 splice_direct_to_actor+0x215/0x510 fs/splice.c:975 do_splice_direct+0x161/0x1e0 fs/splice.c:1063 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1525 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1511 write to 0xffff888125eff670 of 8 bytes by task 8229 on cpu 0: __mark_inode_dirty+0x601/0x940 fs/fs-writeback.c:2285 generic_update_time+0x184/0x270 fs/inode.c:1667 update_time fs/inode.c:1683 [inline] touch_atime+0x172/0x190 fs/inode.c:1754 file_accessed include/linux/fs.h:2202 [inline] generic_file_splice_read+0x4e7/0x500 fs/splice.c:310 do_splice_to+0xf2/0x130 fs/splice.c:877 splice_direct_to_actor+0x1a1/0x510 fs/splice.c:954 do_splice_direct+0x161/0x1e0 fs/splice.c:1063 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1525 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1511 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8229 Comm: syz-executor.1 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================