Date: Sat, 15 Aug 2020 13:51:00 +0200 From: Natanael Copa <ncopa@...inelinux.org> To: musl@...ts.openwall.com Cc: Rich Felker <dalias@...c.org> Subject: Re: Restrictions on child context after multithreaded fork > 15. aug. 2020 kl. 08:51 skrev Timo Teras <timo.teras@....fi>: > > On Fri, 14 Aug 2020 17:41:38 -0400 > Rich Felker <dalias@...c.org> wrote: > >> musl 1.2.1 has exposed bugs in several applications and libraries >> caused by async-signal-unsafe code between (multithreaded) fork and >> subsequent exec. So far, dbus library code, pulseaudio library code, >> and libvirt have been found to be affected. A couple of the bug >> reports (with incomplete information) are: >> >> https://gitlab.alpinelinux.org/alpine/aports/-/issues/11602 >> https://gitlab.alpinelinux.org/alpine/aports/-/issues/11815 > > Add to that list glib and libvte. > > XFCE4 became quite unusable due to glib. Fortunately, it was fixed > quite fast, and is merged for Alpine already: > https://gitlab.gnome.org/GNOME/glib/-/issues/2140 > > Unfortunately, libvte duplicates the some of the code and the issue: > there's https://gitlab.gnome.org/GNOME/vte/-/issues/263 > That got fixed relatively fast too in git master, but is not backported > to any stables branch. So that's not merged yet in Alpine. And is > causing still random lock ups in e.g. xfce4-terminal. > xfce4-terminal was more or less completely useless so I had to add a workaround for it in two patches: First uncover a useless setenv. Even the comment in the code says that it has no effect: https://git.alpinelinux.org/aports/commit/community/vte3?id=ad687b01b2a5fa9d53fcd9d0ee3743882f3542b4 In the second patch I use some of the hunks in the upstream and replace malloc with alloca: https://git.alpinelinux.org/aports/commit/community/vte3?id=161434fcb87807dae40dffdd332db1624b747bc7 After that xfce4-terminal becomes useable again. -nc
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