================================================================== BUG: KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty write to 0xffff8881a8c022d8 of 8 bytes by task 9043 on cpu 1: __mark_inode_dirty+0x1f8/0x680 fs/fs-writeback.c:2431 mark_buffer_dirty+0x143/0x200 fs/buffer.c:1112 __block_commit_write fs/buffer.c:2079 [inline] block_write_end+0x13d/0x260 fs/buffer.c:2158 generic_write_end+0x5e/0x180 fs/buffer.c:2172 ext4_da_write_end+0x59b/0x730 fs/ext4/inode.c:3110 generic_perform_write+0x22a/0x3c0 mm/filemap.c:3667 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519 call_write_iter include/linux/fs.h:2114 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x40a/0x750 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x650 fs/splice.c:891 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881a8c022d8 of 8 bytes by task 9056 on cpu 0: inode_is_dirtytime_only include/linux/fs.h:2422 [inline] __ext4_update_other_inode_time+0x48/0x5c0 fs/ext4/inode.c:4963 ext4_update_other_inodes_time fs/ext4/inode.c:5006 [inline] ext4_do_update_inode fs/ext4/inode.c:5135 [inline] ext4_mark_iloc_dirty+0x12b6/0x1750 fs/ext4/inode.c:5724 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5918 ext4_da_write_end+0x4c7/0x730 fs/ext4/inode.c:3100 generic_perform_write+0x22a/0x3c0 mm/filemap.c:3667 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519 call_write_iter include/linux/fs.h:2114 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x40a/0x750 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x650 fs/splice.c:891 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000000 -> 0x0000000000000007 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9056 Comm: syz-executor.4 Tainted: G W 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================