[linux-lvm] [PATCH 3/3] Disable udev rules if udev flags can't be obtained

Demi Marie Obenour demi at invisiblethingslab.com
Mon Apr 4 21:56:03 UTC 2022

In this cased the safest option is to disable most udev rules.
 udev/10-dm.rules.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/udev/10-dm.rules.in b/udev/10-dm.rules.in
index b4fa52a..9fae8df 100644
--- a/udev/10-dm.rules.in
+++ b/udev/10-dm.rules.in
@@ -50,7 +50,7 @@ ACTION!="add|change", GOTO="dm_end"
 # These flags are encoded in DM_COOKIE variable that was introduced in
 # kernel version 2.6.31. Therefore, we can use this feature with
 # kernels >= 2.6.31 only. Cookie is not decoded for remove event.
-ENV{DM_COOKIE}=="?*", IMPORT{program}="(DM_EXEC)/dmsetup udevflags $env{DM_COOKIE}"
+ENV{DM_COOKIE}=="?*", IMPORT{program}!="(DM_EXEC)/dmsetup udevflags $env{DM_COOKIE}", GOTO="dm_disable"
 # Rule out easy-to-detect inappropriate events first.
 ENV{DISK_RO}=="1", GOTO="dm_disable"
Demi Marie Obenour (she/her/hers)
Invisible Things Lab

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