[Bug 9556] New: glob() in ash is overused
bugzilla at busybox.net
bugzilla at busybox.net
Thu Jan 5 00:57:09 UTC 2017
https://bugs.busybox.net/show_bug.cgi?id=9556
Bug ID: 9556
Summary: glob() in ash is overused
Product: Busybox
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned at busybox.net
Reporter: przemoc at gmail.com
CC: busybox-cvs at busybox.net
Target Milestone: ---
In http://lists.busybox.net/pipermail/busybox/2017-January/085055.html Denys
wrote: "Okay, so by now that usage of glob() in ash uncovered glob() bugs in
both uclibc and musl.", but due to musl's inability to handle patterns longer
than PATH_MAX (which is 4096 in musl), other kind of bug has been uncovered in
busybox's ash itself.
glob() in ash is overused. Example:
$ busybox ash -c 'X=$(printf "%*s" 4096 "*"); echo "$X"'
I don't think there is any legitimate reason to call glob() here during echo,
yet it is called (and fails in current musl version, leading to GLOB_NOSPACE
and ash's "out of memory" error).
(Initially reported on #busybox freenode IRC channel two days ago.)
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