• Yan Zheng's avatar
    Btrfs: Fix race in btrfs_mark_extent_written · c36047d7
    Yan Zheng authored
    When extent needs to be split, btrfs_mark_extent_written truncates the extent
    first, then inserts a new extent and increases the reference count.
    
    The race happens if someone else deletes the old extent before the new extent
    is inserted. The fix here is increase the reference count in advance. This race
    is similar to the race in btrfs_drop_extents that was recently fixed.
    Signed-off-by: default avatarYan Zheng <zheng.yan@oracle.com>
    c36047d7
file.c 34.9 KB