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  • 2 commits
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Commits on May 29, 2026

  1. mruby-io: cap puts recursion depth to prevent C stack overflow 

    io_puts_ary recursed unconditionally on nested arrays. For cyclic
arrays (a = []; a << a; puts a) or pathologically deep arrays,
this caused a C stack overflow.

Add a depth cap (IO_PUTS_MAX_DEPTH = 16); on overflow, write
"[...]\n" and return, matching CRuby's behavior on cycles. The
pattern mirrors mruby-set's MAX_NESTED_DEPTH for the same problem
shape (pure C recursion not dispatched as a Ruby method).

Reported by OSS-Fuzz (clusterfuzz testcase 6233530857488384).

Co-authored-by: Claude <[email protected]>
(cherry picked from commit 7dfd560)
    @matz @claude @rlitretfhfgh
    2 people authored and rlitretfhfgh committed May 29, 2026
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Commits on May 30, 2026

  1. Merge pull request #6876 from dkgkdfg65/backport/7dfd560d-stable 

    [stable] backport: cap IO#puts recursion depth on cyclic arrays (mruby-io)
    @matz
    matz authored May 30, 2026
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    31ea493 View commit details
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