diff options
| -rw-r--r-- | drivers/char/moxa.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 7dbaee8d940..e0d35c20c04 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -1582,7 +1582,7 @@ copy: if(copy_from_user(&dltmp, argp, sizeof(struct dl_str))) return -EFAULT; - if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS) + if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS || dltmp.len < 0) return -EINVAL; switch(cmd) @@ -2529,6 +2529,8 @@ static int moxaloadbios(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr; int i; + if(len < 0 || len > sizeof(moxaBuff)) + return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; baseAddr = moxa_boards[cardno].basemem; @@ -2576,7 +2578,7 @@ static int moxaload320b(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr; int i; - if(len > sizeof(moxaBuff)) + if(len < 0 || len > sizeof(moxaBuff)) return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; @@ -2596,6 +2598,8 @@ static int moxaloadcode(int cardno, unsigned char __user *tmp, int len) void __iomem *baseAddr, *ofsAddr; int retval, port, i; + if(len < 0 || len > sizeof(moxaBuff)) + return -EINVAL; if(copy_from_user(moxaBuff, tmp, len)) return -EFAULT; baseAddr = moxa_boards[cardno].basemem; |