On 29 January 2016 at 19:18, Pavel Shamis <pasharesea...@gmail.com> wrote: > Dear QEMU Developers, > > I'm trying to build and run UCX project > (https://github.com/openucx/ucx) under qemu user mode. > I have no problem to build the project, but whenever I'm trying to > run/use binaries from the project > I get the following error: > > ./bin/ucx_info > qemu-aarch64-static: qemu-2.5.0/translate-all.c:1888: page_set_flags: > Assertion `start < end' failed. > qemu: uncaught target signal 6 (Aborted) - core dumped > Aborted (core dumped)
This turns out to be a bug in QEMU where we were not correctly handling an attempt by the guest to do shmdt(0). This isn't a valid thing to do, but we were not handling it gracefully. I've just sent a patch to the list which corrects our behaviour so we now fail the syscall EINVAL rather than asserting. With this the ucx_info program prints out its help message when run. (http://patchwork.ozlabs.org/patch/580923/) You might want to investigate why you're trying to shmdt(0) -- maybe there's some code that's not handling an error properly ? Looking at QEMU's strace output this seems to happen shortly after a failed shmat() syscall. thanks -- PMM
