This is a note to let you know that I've just added the patch titled
drm/i915/perf: add sentinel to xehp_oa_b_counters
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-perf-add-sentinel-to-xehp_oa_b_counters.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 339638982e36115af550bd2e6ffd2b87fa2d288a
Author: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Date: Tue Jul 11 17:34:10 2023 +0200
drm/i915/perf: add sentinel to xehp_oa_b_counters
[ Upstream commit 785b3f667b4bf98804cad135005e964df0c750de ]
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: 0fa9349dda03 ("drm/i915/perf: complete programming whitelisting for XEHPSDV")
Signed-off-by: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230711153410.1224997-1-andrzej.hajda@xxxxxxxxx
(cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 3035cba2c6a29..d7caae281fb92 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -4442,6 +4442,7 @@ 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[] = {
