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nvmem: core: Fix memleak in nvmem_register() 

commit bd1244561f upstream.

dev_set_name will alloc memory for nvmem->dev.kobj.name in
nvmem_register, when nvmem_validate_keepouts failed, nvmem's
memory will be freed and return, but nobody will free memory
for nvmem->dev.kobj.name, there will be memleak, so moving
nvmem_validate_keepouts() after device_register() and let
the device core deal with cleaning name in error cases.

Fixes: de0534df93 ("nvmem: core: fix error handling while validating keepout regions")
Cc: stable@vger.kernel.org
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916120402.38753-1-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gaosheng Cui 2022-09-16 13:04:02 +01:00 committed by Greg Kroah-Hartman
parent 5177bdc38e
commit 2bd2774df0
1 changed files with 6 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/nvmem/core.c
View File

@ -829,21 +829,18 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
nvmem->dev.groups = nvmem_dev_groups;
#endif
if (nvmem->nkeepout) {
rval = nvmem_validate_keepouts(nvmem);
if (rval) {
ida_free(&nvmem_ida, nvmem->id);
kfree(nvmem);
return ERR_PTR(rval);
}
}
dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name);
rval = device_register(&nvmem->dev);
if (rval)
goto err_put_device;
if (nvmem->nkeepout) {
rval = nvmem_validate_keepouts(nvmem);
if (rval)
goto err_device_del;
}
if (config->compat) {
rval = nvmem_sysfs_setup_compat(nvmem, config);
if (rval)