On 7/11/2023 5:34 PM, Andrzej Hajda wrote:
Arrays passed to reg_in_range_table should end with empty record.
The patch solves KASAN detected bug with signature:
BUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]
Read of size 4 at addr ffffffffa1555d90 by task perf/1518
CPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1
Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023
Call Trace:
<TASK>
...
xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]
Fixes: 0fa9349dda030f ("drm/i915/perf: complete programming whitelisting for XEHPSDV")
Signed-off-by: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_perf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 7413c11fb562e9..49c6f1ff11284f 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -4431,6 +4431,7 @@ static const struct i915_range mtl_oam_b_counters[] = {
static const struct i915_range xehp_oa_b_counters[] = {
{ .start = 0xdc48, .end = 0xdc48 }, /* OAA_ENABLE_REG */
{ .start = 0xdd00, .end = 0xdd48 }, /* OAG_LCE0_0 - OAA_LENABLE_REG */
+ {}
};
static const struct i915_range gen7_oa_mux_regs[] = {
