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test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation 

commit 7dae593cd2 upstream.

In a couple of situations like

	name = kstrndup(buf, count, GFP_KERNEL);
	if (!name)
		return -ENOSPC;

the error is not actually "No space left on device", but "Out of memory".

It is semantically correct to return -ENOMEM in all failed kstrndup()
and kzalloc() cases in this driver, as it is not a problem with disk
space, but with kernel memory allocator failing allocation.

The semantically correct should be:

        name = kstrndup(buf, count, GFP_KERNEL);
        if (!name)
                return -ENOMEM;

Cc: Dan Carpenter <error27@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Luis R. Rodriguez" <mcgrof@ruslug.rutgers.edu>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Brian Norris <briannorris@chromium.org>
Fixes: c92316bf8e ("test_firmware: add batched firmware tests")
Fixes: 0a8adf5847 ("test: add firmware_class loader test")
Fixes: 548193cba2 ("test_firmware: add support for firmware_request_platform")
Fixes: eb910947c8 ("test: firmware_class: add asynchronous request trigger")
Fixes: 061132d2b9 ("test_firmware: add test custom fallback trigger")
Fixes: 7feebfa487 ("test_firmware: add support for request_firmware_into_buf")
Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Message-ID: <20230606070808.9300-1-mirsad.todorovac@alu.unizg.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mirsad Goran Todorovac 2023-06-06 09:08:10 +02:00 committed by Greg Kroah-Hartman
parent 0f68b0f8eb
commit 2af8ed1197
1 changed files with 5 additions and 5 deletions
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10
lib/test_firmware.c
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@ -173,7 +173,7 @@ static int __kstrncpy(char **dst, const char *name, size_t count, gfp_t gfp)
{
*dst = kstrndup(name, count, gfp);
if (!*dst)
return -ENOSPC;
return -ENOMEM;
return count;
}
@ -509,7 +509,7 @@ static ssize_t trigger_request_store(struct device *dev,
name = kstrndup(buf, count, GFP_KERNEL);
if (!name)
return -ENOSPC;
return -ENOMEM;
pr_info("loading '%s'\n", name);
@ -552,7 +552,7 @@ static ssize_t trigger_async_request_store(struct device *dev,
name = kstrndup(buf, count, GFP_KERNEL);
if (!name)
return -ENOSPC;
return -ENOMEM;
pr_info("loading '%s'\n", name);
@ -597,7 +597,7 @@ static ssize_t trigger_custom_fallback_store(struct device *dev,
name = kstrndup(buf, count, GFP_KERNEL);
if (!name)
return -ENOSPC;
return -ENOMEM;
pr_info("loading '%s' using custom fallback mechanism\n", name);
@ -648,7 +648,7 @@ static int test_fw_run_batch_request(void *data)
test_buf = kzalloc(TEST_FIRMWARE_BUF_SIZE, GFP_KERNEL);
if (!test_buf)
return -ENOSPC;
return -ENOMEM;
req->rc = request_firmware_into_buf(&req->fw,
req->name,