diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stv6110x.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stv6110x.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/stv6110x.c b/drivers/media/dvb-frontends/stv6110x.c index f36cab12bdc7..e66154e5c1d7 100644 --- a/drivers/media/dvb-frontends/stv6110x.c +++ b/drivers/media/dvb-frontends/stv6110x.c @@ -32,6 +32,9 @@ #include "stv6110x.h" #include "stv6110x_priv.h" +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + static unsigned int verbose; module_param(verbose, int, 0644); MODULE_PARM_DESC(verbose, "Set Verbosity level"); @@ -61,7 +64,8 @@ static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 da { int ret; const struct stv6110x_config *config = stv6110x->config; - u8 buf[len + 1]; + u8 buf[MAX_XFER_SIZE]; + struct i2c_msg msg = { .addr = config->addr, .flags = 0, @@ -69,6 +73,13 @@ static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 da .len = len + 1 }; + if (1 + len > sizeof(buf)) { + printk(KERN_WARNING + "%s: i2c wr: len=%d is too big!\n", + KBUILD_MODNAME, len); + return -EINVAL; + } + if (start + len > 8) return -EINVAL; |