On 18/09/2024 04:53, Junhao He wrote:

The coresight_init_driver() of the coresight-core module is called from the sub coresgiht device (such as tmc/stm/funnle/...) module. It calls amba_driver_register() and Platform_driver_register(), which are macro functions that use the coresight-core's module to initialize the caller's owner field. Therefore, when the sub coresight device calls coresight_init_driver(), an incorrect THIS_MODULE value is captured.

The sub coesgiht modules can be removed while their callbacks are running, resulting in a general protection failure.

Add module parameter to coresight_init_driver() so can be called with the module of the callback.

Fixes: 075b7cd7ad7d ("coresight: Add helpers registering/removing both AMBA and platform drivers") Signed-off-by: Junhao He hejunhao3@huawei.com

Thanks for the fix, looks good to me. I will queue this for v6.13

Suzuki

---

drivers/hwtracing/coresight/coresight-catu.c | 2 +- drivers/hwtracing/coresight/coresight-core.c | 6 +++--- drivers/hwtracing/coresight/coresight-cpu-debug.c | 3 ++- drivers/hwtracing/coresight/coresight-funnel.c | 3 ++- drivers/hwtracing/coresight/coresight-replicator.c | 3 ++- drivers/hwtracing/coresight/coresight-stm.c | 2 +- drivers/hwtracing/coresight/coresight-tmc-core.c | 2 +- drivers/hwtracing/coresight/coresight-tpiu.c | 2 +- include/linux/coresight.h | 2 +- 9 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index bfea880d6dfb..337668f9cfd4 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -702,7 +702,7 @@ static int __init catu_init(void) { int ret;

• ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver);

• ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver, THIS_MODULE); tmc_etr_set_catu_ops(&etr_catu_buf_ops); return ret; }

diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 9fc6f6b863e0..c546a417836c 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -1399,17 +1399,17 @@ module_init(coresight_init); module_exit(coresight_exit); int coresight_init_driver(const char *drv, struct amba_driver *amba_drv,

• 	  struct platform_driver *pdev_drv)
  

• 	  struct platform_driver *pdev_drv, struct module *owner)
  

  { int ret;

• ret = amba_driver_register(amba_drv);

• ret = __amba_driver_register(amba_drv, owner); if (ret) { pr_err("%s: error registering AMBA driver\n", drv); return ret; }

• ret = platform_driver_register(pdev_drv);

• ret = __platform_driver_register(pdev_drv, owner); if (!ret) return 0;

diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c index 75962dae9aa1..cc599c5ef4b2 100644 --- a/drivers/hwtracing/coresight/coresight-cpu-debug.c +++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c @@ -774,7 +774,8 @@ static struct platform_driver debug_platform_driver = { static int __init debug_init(void) {

• return coresight_init_driver("debug", &debug_driver, &debug_platform_driver);

• return coresight_init_driver("debug", &debug_driver, &debug_platform_driver,

• 		     THIS_MODULE);
  

  }

static void __exit debug_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c index 5a819c8970fb..8f451b051ddc 100644 --- a/drivers/hwtracing/coresight/coresight-funnel.c +++ b/drivers/hwtracing/coresight/coresight-funnel.c @@ -433,7 +433,8 @@ static struct amba_driver dynamic_funnel_driver = { static int __init funnel_init(void) {

• return coresight_init_driver("funnel", &dynamic_funnel_driver, &funnel_driver);

• return coresight_init_driver("funnel", &dynamic_funnel_driver, &funnel_driver,

• 		     THIS_MODULE);
  

  }

static void __exit funnel_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index 3e55be9c8418..f7607c72857c 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -438,7 +438,8 @@ static struct amba_driver dynamic_replicator_driver = { static int __init replicator_init(void) {

• return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver);

• return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver,

• 		     THIS_MODULE);
  

  }

static void __exit replicator_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index 117dbb484543..403eea8f95d4 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -1046,7 +1046,7 @@ static struct platform_driver stm_platform_driver = { static int __init stm_init(void) {

• return coresight_init_driver("stm", &stm_driver, &stm_platform_driver);

• return coresight_init_driver("stm", &stm_driver, &stm_platform_driver, THIS_MODULE); }

static void __exit stm_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c index b54562f392f3..e31e36635394 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -742,7 +742,7 @@ static struct platform_driver tmc_platform_driver = { static int __init tmc_init(void) {

• return coresight_init_driver("tmc", &tmc_driver, &tmc_platform_driver);

• return coresight_init_driver("tmc", &tmc_driver, &tmc_platform_driver, THIS_MODULE); }

static void __exit tmc_exit(void) diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c index b048e146fbb1..f9ecd05cbe5c 100644 --- a/drivers/hwtracing/coresight/coresight-tpiu.c +++ b/drivers/hwtracing/coresight/coresight-tpiu.c @@ -318,7 +318,7 @@ static struct platform_driver tpiu_platform_driver = { static int __init tpiu_init(void) {

• return coresight_init_driver("tpiu", &tpiu_driver, &tpiu_platform_driver);

• return coresight_init_driver("tpiu", &tpiu_driver, &tpiu_platform_driver, THIS_MODULE); }

static void __exit tpiu_exit(void) diff --git a/include/linux/coresight.h b/include/linux/coresight.h index f09ace92176e..e6c26952ddc2 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -660,7 +660,7 @@ coresight_find_output_type(struct coresight_platform_data *pdata, union coresight_dev_subtype subtype); int coresight_init_driver(const char *drv, struct amba_driver *amba_drv,

• 	  struct platform_driver *pdev_drv);
  

• 	  struct platform_driver *pdev_drv, struct module *owner);
  

void coresight_remove_driver(struct amba_driver *amba_drv, struct platform_driver *pdev_drv);