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video: fbdev: metronomefb: fix some off by one bugs 

The "mem" buffer has "size" bytes.  The ">" should be ">=" to prevent
reading one character beyond the end of the array.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Dan Carpenter 2018-07-24 19:11:26 +02:00 committed by Bartlomiej Zolnierkiewicz
parent ff459c2dc0
commit 5c820b8064
1 changed files with 5 additions and 5 deletions
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10
drivers/video/fbdev/metronomefb.c
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@ -233,7 +233,7 @@ static int load_waveform(u8 *mem, size_t size, int m, int t,
/* check temperature range table checksum */
cksum_idx = sizeof(*wfm_hdr) + wfm_hdr->trc + 1;
if (cksum_idx > size)
if (cksum_idx >= size)
return -EINVAL;
cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem);
if (cksum != mem[cksum_idx]) {
@ -245,7 +245,7 @@ static int load_waveform(u8 *mem, size_t size, int m, int t,
/* check waveform mode table address checksum */
wmta = get_unaligned_le32(wfm_hdr->wmta) & 0x00FFFFFF;
cksum_idx = wmta + m*4 + 3;
if (cksum_idx > size)
if (cksum_idx >= size)
return -EINVAL;
cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
if (cksum != mem[cksum_idx]) {
@ -257,7 +257,7 @@ static int load_waveform(u8 *mem, size_t size, int m, int t,
/* check waveform temperature table address checksum */
tta = get_unaligned_le32(mem + wmta + m * 4) & 0x00FFFFFF;
cksum_idx = tta + trn*4 + 3;
if (cksum_idx > size)
if (cksum_idx >= size)
return -EINVAL;
cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
if (cksum != mem[cksum_idx]) {
@ -270,7 +270,7 @@ static int load_waveform(u8 *mem, size_t size, int m, int t,
metromem buffer. this does runlength decoding of the waveform */
wfm_idx = get_unaligned_le32(mem + tta + trn * 4) & 0x00FFFFFF;
owfm_idx = wfm_idx;
if (wfm_idx > size)
if (wfm_idx >= size)
return -EINVAL;
while (wfm_idx < size) {
unsigned char rl;
@ -292,7 +292,7 @@ static int load_waveform(u8 *mem, size_t size, int m, int t,
}
cksum_idx = wfm_idx;
if (cksum_idx > size)
if (cksum_idx >= size)
return -EINVAL;
cksum = calc_cksum(owfm_idx, cksum_idx, mem);
if (cksum != mem[cksum_idx]) {