Date: Wed, 08 Sep 2021 13:37:32 +0000 From: bugzilla-noreply@freebsd.org To: threads@FreeBSD.org Subject: [Bug 258360] race between setlocale() and iconv_open() causes segfault Message-ID: <bug-258360-13406-yM5nOjuirq@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-258360-13406@https.bugs.freebsd.org/bugzilla/> References: <bug-258360-13406@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D258360 Mark Johnston <markj@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|New |Open --- Comment #2 from Mark Johnston <markj@FreeBSD.org> --- (In reply to Xin LI from comment #1) The basic problem is that localeconv_l() updates the global lconv lazily. = When setlocale() updates the process-global locale, it sets a couple of flags, monetary_locale_changed and numeric_locale_changed, to indicate that the lc= onv needs to be reloaded. But setlocale() sets those flags before it's actually finished doing some swizzling. Note that the problem doesn't directly involve iconv_open(), it just happen= s to be triggered because iconv calls snprintf() at some point. I'm having a ha= rd time understanding what guarantees we're supposed to provide here, POSIX doesn't seem to say much about thread-safety and setlocale(), but it seems pretty reasonable to expect localeconv_l() to behave correctly wrt a concur= rent setlocale() call, though. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-258360-13406-yM5nOjuirq>