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  1. JDK
  2. JDK-8325567

jspawnhelper without args fails with segfault

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    • b14
    • linux, os_x

    Backports

      Description

        When `jspawnhelper` is run without args it outputs:

        "This command is not for general use and should only be run as the result of a call to ProcessBuilder.start() or Runtime.exec() in a java application"

        JDK-8310265 broke this. Now `jspawnhelper` fails with sigfault because of the change:

        - /* argv[0] contains the fd number to read all the child info */
        + /* argv[1] contains the fd number to read all the child info */
            int r, fdin, fdout;

        - r = sscanf (argv[argc-1], "%d:%d", &fdin, &fdout);
        + r = sscanf (argv[1], "%d:%d", &fdin, &fdout);

        Without args, argc is 1, so argv[1] is an out of bound access.

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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-8331355 jspawnhelper without args fails with segfault

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

            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-8329687 jspawnhelper without args fails with segfault

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

            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-8329879 jspawnhelper without args fails with segfault

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8310265 (process) jspawnhelper should not use argv[0]

            • P3 - Major loss of function.
            • Closed

            Enhancement - null JDK-8325621 Improve jspawnhelper version checks

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

            Commit Commit openjdk/jdk21u-dev/1c4479fd

            Commit Commit openjdk/jdk22u/5d7f7da0

            Commit Commit openjdk/jdk/26274709

            Review Review openjdk/jdk17u-dev/2339

            Review Review openjdk/jdk21u-dev/414

            Review Review openjdk/jdk22u/126

            Review Review openjdk/jdk/18074

            Review Review openjdk/jdk/18112

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                easlan Elif Aslan
                eastigeevich Evgeny Astigeevich
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                  Created:
                  Updated:
                  Resolved: