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  1. JDK
  2. JDK-8316468

os::write incorrectly handles partial write

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    • 21
    • b16
    • Not verified

    Backports

      Description

        JDK-8303942 introduced a bug in os::write() in os.cpp for handling partial write:
        ```
        buf = (void *)((char *)buf + nBytes);
        ```
        should be

        ```
        buf = (void *)((char *)buf + res);
        ```

        We observed that in JDK 21, heap dump corruption observed in JDK-8303937 happens again when writing to a socket or pipe.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8316919 os::write incorrectly handles partial write

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8303937 Corrupted heap dumps due to missing retries for os::write()

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8303942 os::write should write completely

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            links to

            Commit Commit openjdk/jdk21u/ea00fcab

            Commit Commit openjdk/jdk/7ce5bd15

            Review Review openjdk/jdk21u/176

            Review Review openjdk/jdk/15808

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                manc Man Cao
                manc Man Cao
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                  Created:
                  Updated:
                  Resolved: