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perf/arm-cmn: Fix filter_sel lookup

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Carefully considering the bounds of an array is all well and good,
until you forget that that array also contains a NULL sentinel at
the end and dereference it. So close...

Reported-by: Qian Cai <quic_qiancai@quicinc.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/bebba768156aa3c0757140457bdd0fec10819388.1652217788.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Robin Murphy 2022-05-10 22:23:08 +01:00 committed by Will Deacon
parent 33835e8dfb
commit 3630b2a863
1 changed files with 1 additions and 1 deletions
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2
drivers/perf/arm-cmn.c
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@ -1514,7 +1514,7 @@ static enum cmn_filter_select arm_cmn_filter_sel(enum cmn_model model,
struct arm_cmn_event_attr *e;
int i;
for (i = 0; i < ARRAY_SIZE(arm_cmn_event_attrs); i++) {
for (i = 0; i < ARRAY_SIZE(arm_cmn_event_attrs) - 1; i++) {
e = container_of(arm_cmn_event_attrs[i], typeof(*e), attr.attr);
if (e->model & model && e->type == type && e->eventid == eventid)
return e->fsel;