drm/nouveau: fix i2ctable bounds checking
i2c_entries seems to be the number of i2c entries,
so with index equal to this number, we could read
invalid data from i2ctable. Fix it.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index c1cee91..ef2fe96 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -4984,7 +4984,8 @@
else
NV_WARN(dev,
"DCB I2C table has more entries than indexable "
- "(%d entries, max index 15)\n", i2ctable[2]);
+ "(%d entries, max %d)\n", i2ctable[2],
+ DCB_MAX_NUM_I2C_ENTRIES);
entry_len = i2ctable[3];
/* [4] is i2c_default_indices, read in parse_dcb_table() */
}
@@ -5000,8 +5001,8 @@
if (index == 0xf)
return 0;
- if (index > i2c_entries) {
- NV_ERROR(dev, "DCB I2C index too big (%d > %d)\n",
+ if (index >= i2c_entries) {
+ NV_ERROR(dev, "DCB I2C index too big (%d >= %d)\n",
index, i2ctable[2]);
return -ENOENT;
}