diff options
Diffstat (limited to 'drivers/message/i2o/i2o_config.c')
| -rw-r--r-- | drivers/message/i2o/i2o_config.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c index 9a49c243a6a..04bd3b6de40 100644 --- a/drivers/message/i2o/i2o_config.c +++ b/drivers/message/i2o/i2o_config.c @@ -189,7 +189,7 @@ static int i2o_cfg_parms(unsigned long arg, unsigned int type) return -ENXIO; /* - * Stop users being able to try and allocate arbitary amounts + * Stop users being able to try and allocate arbitrary amounts * of DMA space. 64K is way more than sufficient for this. */ if (kcmd.oplen > 65536) @@ -687,6 +687,11 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd, } size = size >> 16; size *= 4; + if (size > sizeof(rmsg)) { + rcode = -EINVAL; + goto sg_list_cleanup; + } + /* Copy in the user's I2O command */ if (copy_from_user(rmsg, user_msg, size)) { rcode = -EFAULT; @@ -749,19 +754,19 @@ static long i2o_cfg_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) { int ret; - mutex_lock(&i2o_cfg_mutex); switch (cmd) { case I2OGETIOPS: ret = i2o_cfg_ioctl(file, cmd, arg); break; case I2OPASSTHRU32: + mutex_lock(&i2o_cfg_mutex); ret = i2o_cfg_passthru32(file, cmd, arg); + mutex_unlock(&i2o_cfg_mutex); break; default: ret = -ENOIOCTLCMD; break; } - mutex_unlock(&i2o_cfg_mutex); return ret; } @@ -922,6 +927,11 @@ static int i2o_cfg_passthru(unsigned long arg) } size = size >> 16; size *= 4; + if (size > sizeof(rmsg)) { + rcode = -EFAULT; + goto sg_list_cleanup; + } + /* Copy in the user's I2O command */ if (copy_from_user(rmsg, user_msg, size)) { rcode = -EFAULT; |