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authorDaniel P. Berrangé <berrange@redhat.com>2021-04-29 11:25:13 +0100
committerDaniel P. Berrangé <berrange@redhat.com>2022-02-16 18:52:40 +0000
commit463805711056b431a74917a75cda75ec67fec3d2 (patch)
tree5ca2564e546f23ecc6964479e6fc8ab20b153b60 /softmmu/qemu-seccomp.c
parentc542b302707628609f2a33bcbd3e442282806b8e (diff)
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seccomp: block setns, unshare and execveat syscalls
setns/unshare are used to change namespaces which is not something QEMU needs to be able todo. execveat is a new variant of execve so should be blocked just like execve already is. Acked-by: Eduardo Otubo <otubo@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Diffstat (limited to 'softmmu/qemu-seccomp.c')
-rw-r--r--softmmu/qemu-seccomp.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/softmmu/qemu-seccomp.c b/softmmu/qemu-seccomp.c
index a7bb5c3..deaf8a4 100644
--- a/softmmu/qemu-seccomp.c
+++ b/softmmu/qemu-seccomp.c
@@ -248,6 +248,11 @@ static const struct QemuSeccompSyscall denylist[] = {
{ SCMP_SYS(clone3), QEMU_SECCOMP_SET_SPAWN,
0, NULL, SCMP_ACT_ERRNO(ENOSYS) },
#endif
+#ifdef __SNR_execveat
+ { SCMP_SYS(execveat), QEMU_SECCOMP_SET_SPAWN },
+#endif
+ { SCMP_SYS(setns), QEMU_SECCOMP_SET_SPAWN },
+ { SCMP_SYS(unshare), QEMU_SECCOMP_SET_SPAWN },
/* resource control */
{ SCMP_SYS(setpriority), QEMU_SECCOMP_SET_RESOURCECTL,
0, NULL, SCMP_ACT_ERRNO(EPERM) },