Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so

To: Thorsten Glaser <t.glaser@tarent.de>, 950669@bugs.debian.org, Bernhard Übelacker <bernhardu@mailbox.org>
Cc: Didier 'OdyX' Raboud <odyx@debian.org>
Subject: Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
From: Till Kamppeter <till.kamppeter@gmail.com>
Date: Fri, 21 Feb 2020 18:43:51 +0100
Message-id: <[🔎] c01b5fb7-ae24-5752-17b1-b25284e73efb@gmail.com>
Reply-to: Till Kamppeter <till.kamppeter@gmail.com>, 950669@bugs.debian.org
In-reply-to: <[🔎] alpine.DEB.2.22.394.2002211311100.25615@tglase.lan.tarent.de>
References: <[🔎] 158083224752.7870.9428436584030696161.reportbug@tglase.lan.tarent.de> <[🔎] 22586733.nMJVlEc48B@odyx.org> <[🔎] alpine.DEB.2.22.394.2002042049430.17193@tglase.lan.tarent.de> <[🔎] alpine.DEB.2.22.394.2002051621220.7500@tglase.lan.tarent.de> <[🔎] alpine.DEB.2.22.394.2002051621220.7500@tglase.lan.tarent.de> <[🔎] 2cf7a461-3615-dc22-3e3b-28b7f3b4e38a@mailbox.org> <[🔎] alpine.DEB.2.22.394.2002061918390.6918@tglase-nb.lan.tarent.de> <[🔎] 0f86b1cb-7da0-cffb-86c4-84d8732833b7@mailbox.org> <[🔎] alpine.DEB.2.22.394.2002110047350.8829@tglase-nb.lan.tarent.de> <[🔎] 158083224752.7870.9428436584030696161.reportbug@tglase.lan.tarent.de> <[🔎] alpine.DEB.2.22.394.2002211311100.25615@tglase.lan.tarent.de> <[🔎] 158083224752.7870.9428436584030696161.reportbug@tglase.lan.tarent.de>

In a very recent commit I have added crash guards to theis_local_hostname() function, which cover also the case of host_namebeing NULL:


https://github.com/OpenPrinting/cups-filters/commit/4157690bf

I hope this helps here.

But anyway, thanks for the deep analysis of the problem.

   Till

Reply to:

References:
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <tg@mirbsd.de>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Didier 'OdyX' Raboud <odyx@debian.org>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <t.glaser@tarent.de>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <t.glaser@tarent.de>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Bernhard Übelacker <bernhardu@mailbox.org>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <t.glaser@tarent.de>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Bernhard Übelacker <bernhardu@mailbox.org>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <t.glaser@tarent.de>
- Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so
  - From: Thorsten Glaser <t.glaser@tarent.de>

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