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krun: use of invalid errno #2157

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krun: use of invalid errno#2157

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@eriksjolund
eriksjolund
opened on Aug 2, 2026
  1. To get some more insight of the crun source code I ran the command 
     git grep -20 " errno" src
    There were quite many search results, but I tried to go through the result to find some suspicious uses of errno. I saw this line that looked a bit suspicious:

    crun/src/libcrun/handlers/krun.c

    Line 710 in 46cedc0

    return crun_make_error (err, errno, "start passt");

    in case this code returned -1

    crun/src/libcrun/handlers/krun.c

    Lines 636 to 638 in 46cedc0

    waitpid (pid, &status, 0);
    if (! (WIFEXITED (status)) || WEXITSTATUS (status) != 0)
    return -1;
  2. To get a second opinion, I typed the following in claude web interface claude.ai (claude opus 5) 
    Could you check if errno at this line
https://github.com/containers/crun/blob/46cedc0c4a7342a7bd76f36b7fd7ab01869074e4/src/libcrun/handlers/krun.c#L710
has been set by a failure beforehand?
    As usual claude responded with a lot of text, but in the output it looked like claude concluded that it was invalid use of errno.

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