================================================================== BUG: KCSAN: data-race in ext4_ext_convert_to_initialized / ext4_mark_iloc_dirty write to 0xffff888133d5e198 of 4 bytes by task 20301 on cpu 0: ext4_ext_convert_to_initialized+0xb01/0x1000 fs/ext4/extents.c:3459 ext4_ext_handle_unwritten_extents+0x545/0xac0 fs/ext4/extents.c:3884 ext4_ext_map_blocks+0x728/0x1fd0 fs/ext4/extents.c:4119 ext4_map_blocks+0x726/0xff0 fs/ext4/inode.c:638 ext4_iomap_alloc fs/ext4/inode.c:3428 [inline] ext4_iomap_begin+0x513/0x6a0 fs/ext4/inode.c:3478 iomap_apply+0x8d/0x4a0 fs/iomap/apply.c:46 __iomap_dio_rw+0x4c4/0xa30 fs/iomap/direct-io.c:553 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:641 ext4_dio_write_iter fs/ext4/file.c:551 [inline] ext4_file_write_iter+0xe5d/0x10b0 fs/ext4/file.c:661 call_write_iter include/linux/fs.h:1977 [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+0x7a6/0xe20 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888133d5e198 of 4 bytes by task 20299 on cpu 1: ext4_do_update_inode fs/ext4/inode.c:5111 [inline] ext4_mark_iloc_dirty+0xd30/0x16f0 fs/ext4/inode.c:5724 ext4_orphan_del+0x314/0x4a0 fs/ext4/namei.c:3095 ext4_handle_inode_extension+0x4e9/0x550 fs/ext4/file.c:353 ext4_dio_write_iter fs/ext4/file.c:557 [inline] ext4_file_write_iter+0xef4/0x10b0 fs/ext4/file.c:661 call_write_iter include/linux/fs.h:1977 [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+0x7a6/0xe20 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20299 Comm: syz-executor.4 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================