================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff88810756c324 of 4 bytes by task 10570 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 ext4_alloc_file_blocks+0x26f/0x710 fs/ext4/extents.c:4425 ext4_fallocate+0x2a7/0x540 fs/ext4/extents.c:4705 vfs_fallocate+0x479/0x6d0 fs/open.c:311 file_ioctl fs/ioctl.c:494 [inline] do_vfs_ioctl+0xdd4/0xec0 fs/ioctl.c:732 __do_sys_ioctl fs/ioctl.c:751 [inline] __se_sys_ioctl+0x83/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810756c324 of 4 bytes by task 10563 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 ext4_alloc_file_blocks+0x26f/0x710 fs/ext4/extents.c:4425 ext4_fallocate+0x2a7/0x540 fs/ext4/extents.c:4705 vfs_fallocate+0x479/0x6d0 fs/open.c:311 file_ioctl fs/ioctl.c:494 [inline] do_vfs_ioctl+0xdd4/0xec0 fs/ioctl.c:732 __do_sys_ioctl fs/ioctl.c:751 [inline] __se_sys_ioctl+0x83/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 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: 10563 Comm: //selinux Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================