On Sun, Nov 07, 2010 at 05:30:37PM +0100, Philipp Kern wrote: > vsftpd is compiled for s390, but broken on this architecture. The authors > apparently found it a good idea to call syscalls directly in sysdeputil.c. > Sadly this doesn't appear to work for clone() on s390, as eglibc provides > a wrapper for the syscall on this architecture. Instead the code should > call clone() in a sane way, i.e. reusing the function from eglibc instead > of wrangling the syscalls by itself. > > The result of this is vsftpd opening the socket just fine, with the child > segfaulting in eglibc's syscall.S upon a new connection.
A band-aid fix that works is this one, which means falling back to fork(). This does users allow to login again. I found it hard to dig up a proper version of sys_clone(), which is used here, not clone()-like behaviour on s390 that behaves like fork(). diff --git a/sysdeputil.c b/sysdeputil.c index 9dc8a5e..109f940 100644 --- a/sysdeputil.c +++ b/sysdeputil.c @@ -64,7 +64,7 @@ #include <utmpx.h> /* BEGIN config */ -#if defined(__linux__) +#if defined(__linux__) && !defined(__s390__) #include <errno.h> #include <syscall.h> #define VSF_SYSDEP_HAVE_LINUX_CLONE Kind regards Philipp Kern
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