"Fix" crash caused by FAT32 re-use of small buf from buffer cache, at least until problem (starting somewhere between 4.1 and 4.2) in buffer cache is found and a general fix is in place. Simply B_INVAL small buf so it doesn't come back.
"Fix" crash caused by FAT32 re-use of small buf from buffer cache,
at least until problem (starting somewhere between 4.1 and 4.2)
in buffer cache is found and a general fix is in place. Simply
B_INVAL small buf so it doesn't come back.

Addresses PR#6290, confirmed by submitter RD Thrush.

ok tedu@ "should be marked XXX" thib@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars