This should only happen when calling with --no-act, i. e. when being
called as "ifquery", as I don't think we regularly call ifup with --no-
act. It's also in the "if (cmds == iface_query)" code path.
When trying to recreate this on my amd64 laptop, gdb shows that
current_state gets initialized to NULL. However, the crashes on
errors.ubuntu.com are all on armhf, where the local stack variable
apparently just happens to be non-zero. I can force this behaviour by
changing the initialization to
char *current_state = (char*) 1;
then
sudo rm /run/network/ifstate.lo
$ ./ifquery lo
crashes in this manner.
So the solution is rather simple -- initialize current_state.
** Changed in: ifupdown (Ubuntu)
Status: New => Triaged
** Changed in: ifupdown (Ubuntu)
Status: Triaged => In Progress
** Changed in: ifupdown (Ubuntu)
Importance: Undecided => High
** Changed in: ifupdown (Ubuntu)
Assignee: (unassigned) => Martin Pitt (pitti)
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https://bugs.launchpad.net/bugs/1532722
Title:
/sbin/ifup:11:__GI_strncpy:strncpy:do_interface:main
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