diff options
| author | Conor Dooley <conor.dooley@microchip.com> | 2022-03-18 17:21:08 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-03-18 22:30:43 +0100 |
| commit | 8e145bc705e738ebe7ed6c53d93278981d9af356 (patch) | |
| tree | c03c8150367450ede547ba1edf6728f050d872b2 /drivers/soc/microchip | |
| parent | c76edea0e52d5522835534de90c893ca50b04402 (diff) | |
| download | linux-8e145bc705e738ebe7ed6c53d93278981d9af356.tar.bz2 | |
soc/microchip: fix invalid free in mpfs_sys_controller_delete
Fix an invalid kfree in mpfs_sys_controller_delete, by replacing the
devm_kzalloc with a regular kzalloc. Change the error handling in the
probe function to free the sys_controller struct if the probe fails.
> cocci warnings: (new ones prefixed by >>)
> >> drivers/soc/microchip/mpfs-sys-controller.c:73:1-6: WARNING: invalid free of devm_ allocated data
Link: https://lore.kernel.org/linux-mm/202203180259.lgIylRZV-lkp@intel.com/
Fixes: d0054a470c33 ("soc: add microchip polarfire soc system controller")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Conor Dooley <mail@conchuod.ie>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/soc/microchip')
| -rw-r--r-- | drivers/soc/microchip/mpfs-sys-controller.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/soc/microchip/mpfs-sys-controller.c b/drivers/soc/microchip/mpfs-sys-controller.c index 2f4535929762..52291c231f0b 100644 --- a/drivers/soc/microchip/mpfs-sys-controller.c +++ b/drivers/soc/microchip/mpfs-sys-controller.c @@ -96,9 +96,9 @@ static int mpfs_sys_controller_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mpfs_sys_controller *sys_controller; - int i; + int i, ret; - sys_controller = devm_kzalloc(dev, sizeof(*sys_controller), GFP_KERNEL); + sys_controller = kzalloc(sizeof(*sys_controller), GFP_KERNEL); if (!sys_controller) return -ENOMEM; @@ -107,9 +107,12 @@ static int mpfs_sys_controller_probe(struct platform_device *pdev) sys_controller->client.tx_block = 1U; sys_controller->chan = mbox_request_channel(&sys_controller->client, 0); - if (IS_ERR(sys_controller->chan)) - return dev_err_probe(dev, PTR_ERR(sys_controller->chan), - "Failed to get mbox channel\n"); + if (IS_ERR(sys_controller->chan)) { + ret = dev_err_probe(dev, PTR_ERR(sys_controller->chan), + "Failed to get mbox channel\n"); + kfree(sys_controller); + return ret; + } init_completion(&sys_controller->c); kref_init(&sys_controller->consumers); |