================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff88810d7d4ef4 of 4 bytes by task 10301 on cpu 0: jbd2_journal_dirty_metadata+0x2df/0x670 fs/jbd2/transaction.c:1516 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331 ext4_mb_mark_diskspace_used+0x8e9/0xc50 fs/ext4/mballoc.c:3269 ext4_mb_new_blocks+0xa3d/0x1150 fs/ext4/mballoc.c:4993 ext4_ext_map_blocks+0x146f/0x1fd0 fs/ext4/extents.c:4238 ext4_map_blocks+0x726/0xff0 fs/ext4/inode.c:638 mpage_map_one_extent+0x10d/0x3a0 fs/ext4/inode.c:2397 mpage_map_and_submit_extent fs/ext4/inode.c:2450 [inline] ext4_writepages+0xa51/0x1e70 fs/ext4/inode.c:2802 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:424 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:763 ext4_sync_file+0x105/0x6e0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2843 [inline] ext4_buffered_write_iter+0x38f/0x3e0 fs/ext4/file.c:277 ext4_file_write_iter+0x48a/0x10b0 fs/ext4/file.c:502 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:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 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 0xffff88810d7d4ef4 of 4 bytes by task 10298 on cpu 1: jbd2_journal_dirty_metadata+0x15e/0x670 fs/jbd2/transaction.c:1484 __ext4_handle_dirty_metadata+0xc6/0x590 fs/ext4/ext4_jbd2.c:331 ext4_mb_mark_diskspace_used+0x8e9/0xc50 fs/ext4/mballoc.c:3269 ext4_mb_new_blocks+0xa3d/0x1150 fs/ext4/mballoc.c:4993 ext4_ext_map_blocks+0x146f/0x1fd0 fs/ext4/extents.c:4238 ext4_map_blocks+0x726/0xff0 fs/ext4/inode.c:638 mpage_map_one_extent+0x10d/0x3a0 fs/ext4/inode.c:2397 mpage_map_and_submit_extent fs/ext4/inode.c:2450 [inline] ext4_writepages+0xa51/0x1e70 fs/ext4/inode.c:2802 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:424 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:763 ext4_sync_file+0x105/0x6e0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2843 [inline] ext4_buffered_write_iter+0x38f/0x3e0 fs/ext4/file.c:277 ext4_file_write_iter+0x48a/0x10b0 fs/ext4/file.c:502 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:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 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: 10298 Comm: syz-executor.4 Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================