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  1. Lustre
  2. LU-5564

open handle leak after setuid()

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Minor Minor
    • Lustre 2.9.0
    • Lustre 2.7.0
    • 3
    • 15516

      MDS_CLOSE RPCs are sent with the current_fs{uid,gid}(). If this id cannot be resolved on the MDT then mdt_close() fails in unpack and the open handle is never released.

      # MOUNT_2=y llmount.sh
...
# id 42
id: 42: No such user
# cp /bin/sleep /mnt/lustre/sleep
# chown 42:42 /mnt/lustre/sleep
# chmod ug+s /mnt/lustre/sleep
# /mnt/lustre/sleep 0
# echo > /mnt/lustre2/sleep
-bash: /mnt/lustre2/sleep: Text file busy

      [  475.032992] LustreError: 6559:0:(file.c:186:ll_close_inode_openhandle()) lustre-clilmv-ffff8802173141c8: inode [0x200000400:0x3:0x0] mdc close failed: rc = -13

      Seems a bit broken this way. With the exception of HSM release why check process permissions at close? The open FD (open handle) gives us permission.

            hongchao.zhang Hongchao Zhang
            jhammond John Hammond
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              Created:
              Updated:
              Resolved: