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Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c |
Date: |
Wed, 13 Jun 2012 21:30:28 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 13, 2012 at 04:20:22PM -0300, Eduardo Otubo wrote:
> I added a syscall struct using priority levels as described in the
> libseccomp man page. The priority numbers are based to the frequency
> they appear in a sample strace from a regular qemu guest run under
> libvirt.
>
> Libseccomp generates linear BPF code to filter system calls, those rules
> are read one after another. The priority system places the most common
> rules first in order to reduce the overhead when processing them.
>
> Also, since this is just a first RFC, the whitelist is a little raw. We
> might need your help to improve, test and fine tune the set of system
> calls.
>
> v2: Fixed some style issues
> Removed code from vl.c and created qemu-seccomp.[ch]
> Now using ARRAY_SIZE macro
> Added more syscalls without priority/frequency set yet
>
> Signed-off-by: Eduardo Otubo <address@hidden>
> ---
> qemu-seccomp.c | 73
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> qemu-seccomp.h | 9 +++++++
> vl.c | 7 ++++++
> 3 files changed, 89 insertions(+)
> create mode 100644 qemu-seccomp.c
> create mode 100644 qemu-seccomp.h
>
> diff --git a/qemu-seccomp.c b/qemu-seccomp.c
> new file mode 100644
> index 0000000..048b7ba
> --- /dev/null
> +++ b/qemu-seccomp.c
> @@ -0,0 +1,73 @@
> +#include <stdio.h>
> +#include <seccomp.h>
> +#include "qemu-seccomp.h"
> +
> +static struct QemuSeccompSyscall seccomp_whitelist[] = {
> + { SCMP_SYS(timer_settime), 255 },
> + { SCMP_SYS(timer_gettime), 254 },
> + { SCMP_SYS(futex), 253 },
> + { SCMP_SYS(select), 252 },
> + { SCMP_SYS(recvfrom), 251 },
> + { SCMP_SYS(sendto), 250 },
> + { SCMP_SYS(read), 249 },
> + { SCMP_SYS(brk), 248 },
> + { SCMP_SYS(clone), 247 },
> + { SCMP_SYS(mmap), 247 },
> + { SCMP_SYS(mprotect), 246 },
> + { SCMP_SYS(ioctl), 245 },
> + { SCMP_SYS(recvmsg), 245 },
> + { SCMP_SYS(sendmsg), 245 },
> + { SCMP_SYS(accept), 245 },
> + { SCMP_SYS(connect), 245 },
> + { SCMP_SYS(bind), 245 },
> + { SCMP_SYS(listen), 245 },
> + { SCMP_SYS(ioctl), 245 },
> + { SCMP_SYS(eventfd), 245 },
> + { SCMP_SYS(rt_sigprocmask), 245 },
> + { SCMP_SYS(write), 244 },
> + { SCMP_SYS(fcntl), 243 },
> + { SCMP_SYS(tgkill), 242 },
> + { SCMP_SYS(rt_sigaction), 242 },
> + { SCMP_SYS(pipe2), 242 },
> + { SCMP_SYS(munmap), 242 },
> + { SCMP_SYS(mremap), 242 },
> + { SCMP_SYS(getsockname), 242 },
> + { SCMP_SYS(getpeername), 242 },
> + { SCMP_SYS(fdatasync), 242 },
> + { SCMP_SYS(close), 242 }
execve(), so QEMU can run things like the ifup/down
scripts, the samba daemon (sic), exec: migration protocol,
etc, etc
Daniel
--
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- [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, (continued)
- [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Eduardo Otubo, 2012/06/13
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/13
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Daniel P. Berrange, 2012/06/13
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/15
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Daniel P. Berrange, 2012/06/18
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Corey Bryant, 2012/06/18
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/18
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Corey Bryant, 2012/06/18
- Message not available
- Message not available
- Message not available
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Corey Bryant, 2012/06/19
Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Daniel P. Berrange, 2012/06/13
Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c,
Daniel P. Berrange <=
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/15
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Paul Moore, 2012/06/15
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/15
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Paul Moore, 2012/06/15
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/16
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Corey Bryant, 2012/06/18
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Avi Kivity, 2012/06/19
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Blue Swirl, 2012/06/19
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Avi Kivity, 2012/06/21
- Re: [Qemu-devel] [RFC] [PATCHv2 2/2] Adding basic calls to libseccomp in vl.c, Anthony Liguori, 2012/06/27