This is a note to let you know that I've just added the patch titled
regulator: tps6594-regulator: Fix random kernel crash
to the 6.5-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:
regulator-tps6594-regulator-fix-random-kernel-crash.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8d0aaaa1b2d86db710e2b206ac5667226476b70d
Author: Jerome Neanne <jneanne@xxxxxxxxxxxx>
Date: Tue Sep 5 16:07:34 2023 +0200
regulator: tps6594-regulator: Fix random kernel crash
[ Upstream commit ca0e36e3e39a4e8b5a4b647dff8c5938ca6ccbec ]
Random kernel crash detected in TI CICD when regulator driver is added.
This is root caused to irq index increment being done twice causing
irq_data being allocated outside of the range.
- Rework tps6594_request_reg_irqs with correct index increment
- Adjust irq_data kmalloc size to the exact size needed for the device
This has been reported on TI mainline. No public bug report associated.
Reported-by: Udit Kumar <u-kumar1@xxxxxx>
Fixes: f17ccc5deb4d ("regulator: tps6594-regulator: Add driver for TI TPS6594 regulators")
Signed-off-by: Jerome Neanne <jneanne@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230828-tps6594_random_boot_crash_fix-v1-1-f29cbf9ddb37@xxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/regulator/tps6594-regulator.c b/drivers/regulator/tps6594-regulator.c
index d5a574ec6d12f..47c3b7efe145e 100644
--- a/drivers/regulator/tps6594-regulator.c
+++ b/drivers/regulator/tps6594-regulator.c
@@ -384,21 +384,19 @@ static int tps6594_request_reg_irqs(struct platform_device *pdev,
if (irq < 0)
return -EINVAL;
- irq_data[*irq_idx + j].dev = tps->dev;
- irq_data[*irq_idx + j].type = irq_type;
- irq_data[*irq_idx + j].rdev = rdev;
+ irq_data[*irq_idx].dev = tps->dev;
+ irq_data[*irq_idx].type = irq_type;
+ irq_data[*irq_idx].rdev = rdev;
error = devm_request_threaded_irq(tps->dev, irq, NULL,
- tps6594_regulator_irq_handler,
- IRQF_ONESHOT,
- irq_type->irq_name,
- &irq_data[*irq_idx]);
- (*irq_idx)++;
+ tps6594_regulator_irq_handler, IRQF_ONESHOT,
+ irq_type->irq_name, &irq_data[*irq_idx]);
if (error) {
dev_err(tps->dev, "tps6594 failed to request %s IRQ %d: %d\n",
irq_type->irq_name, irq, error);
return error;
}
+ (*irq_idx)++;
}
return 0;
}
@@ -420,8 +418,8 @@ static int tps6594_regulator_probe(struct platform_device *pdev)
int error, i, irq, multi, delta;
int irq_idx = 0;
int buck_idx = 0;
- int ext_reg_irq_nb = 2;
-
+ size_t ext_reg_irq_nb = 2;
+ size_t reg_irq_nb;
enum {
MULTI_BUCK12,
MULTI_BUCK123,
@@ -484,15 +482,16 @@ static int tps6594_regulator_probe(struct platform_device *pdev)
}
}
- if (tps->chip_id == LP8764)
+ if (tps->chip_id == LP8764) {
/* There is only 4 buck on LP8764 */
buck_configured[4] = 1;
+ reg_irq_nb = size_mul(REGS_INT_NB, (BUCK_NB - 1));
+ } else {
+ reg_irq_nb = size_mul(REGS_INT_NB, (size_add(BUCK_NB, LDO_NB)));
+ }
- irq_data = devm_kmalloc_array(tps->dev,
- REGS_INT_NB * sizeof(struct tps6594_regulator_irq_data),
- ARRAY_SIZE(tps6594_bucks_irq_types) +
- ARRAY_SIZE(tps6594_ldos_irq_types),
- GFP_KERNEL);
+ irq_data = devm_kmalloc_array(tps->dev, reg_irq_nb,
+ sizeof(struct tps6594_regulator_irq_data), GFP_KERNEL);
if (!irq_data)
return -ENOMEM;
