Add /dev/kmsg_debug.
Add /dev/kmsg_debug on userdebug devices, to allow crash_dump to log
crashes to dmesg when logd isn't up yet (or is the one crashing).
Bug: http://b/36574794
Test: stop tombstoned; crasher; dmesg
Change-Id: I249e11291c58fee77098dec3fd3271ea23363ac9
diff --git a/private/file_contexts b/private/file_contexts
index 4a392f1..adae7dc 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -104,6 +104,7 @@
/dev/ptmx u:object_r:ptmx_device:s0
/dev/pvrsrvkm u:object_r:gpu_device:s0
/dev/kmsg u:object_r:kmsg_device:s0
+/dev/kmsg_debug u:object_r:kmsg_debug_device:s0
/dev/null u:object_r:null_device:s0
/dev/nvhdcp1 u:object_r:video_device:s0
/dev/random u:object_r:random_device:s0
diff --git a/public/crash_dump.te b/public/crash_dump.te
index a0e278a..0bab782 100644
--- a/public/crash_dump.te
+++ b/public/crash_dump.te
@@ -15,6 +15,9 @@
userdebug_or_eng(`
allow crash_dump logd:process { ptrace signal sigchld sigstop sigkill };
+
+ # Let crash_dump write to /dev/kmsg_debug crashes that happen before logd comes up.
+ allow crash_dump kmsg_debug_device:chr_file { open append };
')
# Use inherited file descriptors
diff --git a/public/device.te b/public/device.te
index 4a3bec9..0f64bfa 100644
--- a/public/device.te
+++ b/public/device.te
@@ -36,6 +36,7 @@
type nfc_device, dev_type;
type ptmx_device, dev_type, mlstrustedobject;
type kmsg_device, dev_type;
+type kmsg_debug_device, dev_type;
type null_device, dev_type, mlstrustedobject;
type random_device, dev_type, mlstrustedobject;
type sensors_device, dev_type;
diff --git a/public/init.te b/public/init.te
index 4b08046..b36a002 100644
--- a/public/init.te
+++ b/public/init.te
@@ -13,6 +13,10 @@
# /dev/kmsg
allow init tmpfs:chr_file relabelfrom;
allow init kmsg_device:chr_file { write relabelto };
+# /dev/kmsg_debug
+userdebug_or_eng(`
+ allow init kmsg_debug_device:chr_file { write relabelto };
+')
# /dev/__properties__
allow init properties_device:dir relabelto;
allow init properties_serial:file { write relabelto };