fs_mgr: Ignore invalid DT device nodes
With treble, the vendor kernel and ramdisk are supposed to be used.
But vendors always find new and interesting ways to break things:
$ cat /proc/device-tree/firmware/android/fstab/system/dev; echo
/by-name/system_a
$
Change-Id: I826a96ebd625b52563d3cc970bf99d9b26dc093e
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 9b7405a..72a65d2 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -33,6 +33,8 @@
#include "fs_mgr_priv.h"
+using android::base::StartsWith;
+
const std::string kDefaultAndroidDtDir("/proc/device-tree/firmware/android");
struct fs_mgr_flag_values {
@@ -439,6 +441,10 @@
LERROR << "dt_fstab: Failed to find device for partition " << dp->d_name;
return {};
}
+ if (!StartsWith(value, "/dev")) {
+ LERROR << "dt_fstab: Invalid device node for partition " << dp->d_name;
+ return {};
+ }
fstab_entry.push_back(value);
std::string mount_point;