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io.c: fix race between read and close

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* io.c (io_fillbuf): fix race between read and close and bail out
  in the case the IO gets closed before the reading thread achieve
  the lock.  [ruby-core:78845] [Bug #13076]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-12-27 11:43:34 +00:00
parent f2502cec8a
commit 09ae127bad
1 changed files with 1 additions and 0 deletions
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io.c
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@ -1775,6 +1775,7 @@ io_fillbuf(rb_io_t *fptr)
rb_syserr_fail_path(e, path);
}
}
if (r > 0) rb_io_check_closed(fptr);
fptr->rbuf.off = 0;
fptr->rbuf.len = (int)r; /* r should be <= rbuf_capa */
if (r == 0)