Package: qemu-user Version: 0.14.1+dfsg-3 Severity: normal Hi,
when a symbolic or hardlink which creates a recursive cycle exists in the directory specified as the elf interpreter prefix (default=/etc/qemu-binfmt/<arch>/), qemu-user will recursively traverse this path and never finish (eating tons of memory in the process). The easiest way to reproduce is to do: ln -s '.' /etc/qemu-binfmt/<arch>/foobar (or wherever directory you pointed qemu to with the -L option) This is mostly annoying because there exists the /usr/bin/X11 symlink which points to '.' in debian systems with x11-common installed. Other problems occur with /proc/self/fd/ (and /dev/fd/ which links to it) when /proc is mounted in the elf interpreter prefix path. The problem occurs when init_paths() is called on interp_prefix (the elf interpreter prefix path). init_paths() doesnt protect from infinitely traversing cyclic symlinks. find(1) solves this problem by maintaining a hashtable of (to be) traversed directories and skipping directories that are found to be already part of it. I can prepare a patch for path.c (which defines init_paths()) which guards against this behaviour in the same way that find(1) does if this problem is desired to be solved that way. cheers, josch -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
