From 8cfd339b3d402f913fe520a4f35f30152fb4fb80 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Tue, 14 Sep 2021 14:32:14 +0200 Subject: [PATCH] tools/virtiofsd: Add fstatfs64 syscall to the seccomp allowlist The virtiofsd currently crashes on s390x when doing something like this in the guest: mkdir -p /mnt/myfs mount -t virtiofs myfs /mnt/myfs touch /mnt/myfs/foo.txt stat -f /mnt/myfs/foo.txt The problem is that the fstatfs64 syscall is called in this case from the virtiofsd. We have to put it on the seccomp allowlist to avoid that the daemon gets killed in this case. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2001728 Suggested-by: Vivek Goyal Signed-off-by: Thomas Huth Message-Id: <20210914123214.181885-1-thuth@redhat.com> Reviewed-by: Vivek Goyal Reviewed-by: Sergio Lopez Reviewed-by: Stefan Hajnoczi Signed-off-by: Dr. David Alan Gilbert --- tools/virtiofsd/passthrough_seccomp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/virtiofsd/passthrough_seccomp.c b/tools/virtiofsd/passthrough_seccomp.c index f49ed94b5e..a3ce9f898d 100644 --- a/tools/virtiofsd/passthrough_seccomp.c +++ b/tools/virtiofsd/passthrough_seccomp.c @@ -51,6 +51,7 @@ static const int syscall_allowlist[] = { SCMP_SYS(fsetxattr), SCMP_SYS(fstat), SCMP_SYS(fstatfs), + SCMP_SYS(fstatfs64), SCMP_SYS(fsync), SCMP_SYS(ftruncate), SCMP_SYS(futex),