From 8fc2d96393f3e501959613d82ba792ca4f22e0e1 Mon Sep 17 00:00:00 2001 From: Simon McVittie Date: Wed, 1 Sep 2021 14:20:29 +0100 Subject: [PATCH] run: Don't allow unmounting filesystems If we don't allow mounting filesystems, we shouldn't allow unmounting either. Partially fixes GHSA-67h7-w3jq-vh4q. Signed-off-by: Simon McVittie --- common/flatpak-run.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/common/flatpak-run.c b/common/flatpak-run.c index ce9c7cb75..d8cb89425 100644 --- a/common/flatpak-run.c +++ b/common/flatpak-run.c @@ -2825,6 +2825,8 @@ setup_seccomp (FlatpakBwrap *bwrap, {SCMP_SYS (unshare), EPERM}, {SCMP_SYS (setns), EPERM}, {SCMP_SYS (mount), EPERM}, + {SCMP_SYS (umount), EPERM}, + {SCMP_SYS (umount2), EPERM}, {SCMP_SYS (pivot_root), EPERM}, #if defined(__s390__) || defined(__s390x__) || defined(__CRIS__) /* Architectures with CONFIG_CLONE_BACKWARDS2: the child stack