From b615b79feaa73bbaa32bb8c30401a4f6f0c0205e Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Tue, 14 Sep 2021 13:29:59 +0200 Subject: [PATCH 2/2] tools/virtiofsd: Add fstatfs64 syscall to the seccomp allowlist MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Miroslav Rezanina RH-MergeRequest: 44: Apply RHEL 9.0.0 Beta fixes to RHEL 9.0.0 RH-Commit: [2/2] 0085289cefb57d49d2423b4f3376e8cf4a970012 (mrezanin/centos-src-qemu-kvm) RH-Bugzilla: 2005026 RH-Acked-by: Daniel P. Berrangé RH-Acked-by: Gerd Hoffmann 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. (cherry picked from commit 8cfd339b3d402f913fe520a4f35f30152fb4fb80) Suggested-by: Vivek Goyal Signed-off-by: Thomas Huth Signed-off-by: Miroslav Rezanina --- 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), -- 2.27.0