Disable usermode helper invocations when the freezer is on. This avoids
deadlocks due to hotplug events occuring while processes are frozen.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/kmod.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 51a8920..12afa2c 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -36,6 +36,7 @@
#include <linux/mount.h>
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/freezer.h>
#include <asm/uaccess.h>
extern int max_threads;
@@ -249,6 +250,9 @@ int call_usermodehelper_keys(char *path,
if (!khelper_wq)
return -EBUSY;
+ if (freezer_is_on())
+ return 0;
+
if (path[0] == '\0')
return 0;
--
Nigel Cunningham nigel at suspend2 dot net
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