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Re: obstack-printf: Fix memory overrun on glibc systems
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From: |
Bruno Haible |
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Subject: |
Re: obstack-printf: Fix memory overrun on glibc systems |
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Date: |
Sat, 12 Jul 2025 16:39:53 +0200 |
> Compiling GNU Bison (HEAD~10) with the newest gnulib, and running "make
> check",
> I get 8 test failures:
> testsuite: 608 615 619 620 622 623 625 626 failed
> Seen on Ubuntu 22.04 and on Ubuntu 24.04 with gcc 13.
>
> Same of the failures are caused by SIGSEGV, some by SIGABRT:
Different symptoms in a slightly different configuration:
+bison: obprintf.c:158: __obstack_vprintf_internal: Assertion `size ==
(new_f.ofile.file.file._IO_write_end - new_f.ofile.file.file._IO_write_base)'
failed.
+/home/runner/work/ci-check/ci-check/bison/tests/bison: line 34: 88381 Aborted
(core dumped)
Fixed by the same patch.
Bruno