virtiofsd: Add _llseek to the seccomp whitelist

This is how glibc implements lseek(2) on POWER.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1917692
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20210121171540.1449777-1-groug@kaod.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

diff --git a/tools/virtiofsd/passthrough_seccomp.c b/tools/virtiofsd/passthrough_seccomp.c
index a60d7da4b4e27cc32877da9e9df423c83ef2025e..1ecf5bf318b32208a5678535d07c43031cb80494 100644 (file)
--- a/tools/virtiofsd/passthrough_seccomp.c
+++ b/tools/virtiofsd/passthrough_seccomp.c
@@ -65,6 +65,7 @@ static const int syscall_whitelist[] = {
     SCMP_SYS(linkat),
     SCMP_SYS(listxattr),
     SCMP_SYS(lseek),
+    SCMP_SYS(_llseek), /* For POWER */
     SCMP_SYS(madvise),
     SCMP_SYS(mkdirat),
     SCMP_SYS(mknodat),