[PATCH 1/1] hwclock: Verify RTC file descriptor; use reentrant functions

[Ralf Friedl]

Bryan Evenson wrote:
> Similarly, the returned pointer of ctime and localtime was
> being used without checking if the pointer was valid. One of
> these calls was causing a call to hwclock to enter an
> uninterruptable sleep when the invalid hwclock access occurred.

An uninterruptable sleep is a kernel bug. Can you use strace on your 
script to see the sequence of calls that leads to this uninterruptable 
sleep?