[Qemu-devel] [Bug 1245703] [NEW] LD_PREFIX option reads directories recursively in an endless loop
Public bug reported: If I run qemu user emulation with -L /path/to/my/sysroot/ in which also the proc and dev filesystem is mounted QEMU eats my memory until it gets killed by the kernel. According to the strace output it follows the symbolic links in the proc filesystem running forever in a recursive loop. The easiest solution would be to add in the function "add_dir_maybe" in the file util/path.c an additional check for symbolic links that it don't follow them. Also I don't really understand the need of doing this. A lot of ressources are wasted everytime QEMU-user is started just by having the directory structure in memory. In my case this are more than 2 entries which QEMU is loading every time. ** Affects: qemu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1245703 Title: LD_PREFIX option reads directories recursively in an endless loop Status in QEMU: New Bug description: If I run qemu user emulation with -L /path/to/my/sysroot/ in which also the proc and dev filesystem is mounted QEMU eats my memory until it gets killed by the kernel. According to the strace output it follows the symbolic links in the proc filesystem running forever in a recursive loop. The easiest solution would be to add in the function "add_dir_maybe" in the file util/path.c an additional check for symbolic links that it don't follow them. Also I don't really understand the need of doing this. A lot of ressources are wasted everytime QEMU-user is started just by having the directory structure in memory. In my case this are more than 2 entries which QEMU is loading every time. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1245703/+subscriptions
Re: [Qemu-devel] [Bug 1245703] [NEW] LD_PREFIX option reads directories recursively in an endless loop
On 28 October 2013 23:15, Sebastian Macke wrote: > If I run qemu user emulation with -L /path/to/my/sysroot/ in which also > the proc and dev filesystem is mounted QEMU eats my memory until it gets > killed by the kernel. > > According to the strace output it follows the symbolic links in the proc > filesystem running forever in a recursive loop. > > The easiest solution would be to add in the function "add_dir_maybe" in > the file util/path.c an additional check for symbolic links that it > don't follow them. Yeah, this -L code is just busted. It's really only intended to work with extremely simple sysroot directories which don't have weird stuff like proc mounts or symlinks and aren't very big. If the thing you're looking at isn't like that then you might be better off using the "static qemu and chroot into the directory" approach instead. -- PMM
