Michael Buesch
authored
commit 6b4dbcd8 upstream. loff_t is a signed type. If userspace passes a negative ppos, the "count" range check is weakened. "count"s bigger than HPEE_MAX_LENGTH will pass the check. Also, if ppos is negative, the readb(eisa_eeprom_addr + *ppos) will poke in random memory. Signed-off-by:Michael Buesch <mb@bu3sch.de> Signed-off-by:
Helge Deller <deller@gmx.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>