[PATCH] staging: fbtft: fix out of bound access
Joe Perches
joe at perches.com
Thu Jun 4 12:12:23 UTC 2015
On Thu, 2015-06-04 at 17:12 +0530, Sudip Mukherjee wrote:
> size of str is 16, but in snprintf the size was mentioned as 128.
[]
> diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
[]
> @@ -1096,7 +1096,7 @@ static int fbtft_init_display_dt(struct fbtft_par *par)
> /* make debug message */
> msg[0] = '\0';
> for (j = 0; j < i; j++) {
> - snprintf(str, 128, " %02X", buf[j]);
> + snprintf(str, 16, " %02X", buf[j]);
using sizeof(str) is probably more robust
msg isn't big enough to hold the maximum possible output.
If this is really useful, and I rather doubt it is,
it'd probably be better to use a loop to output
multiple lines, one for each register.
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