[ Upstream commit 7dae593cd226a0bca61201cf85ceb9335cf63682 ]
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@kernel.org Cc: Brian Norris computersforpeace@gmail.com Cc: stable@vger.kernel.org # 5.4 Fixes: c92316bf8e948 ("test_firmware: add batched firmware tests") Fixes: 0a8adf584759c ("test: add firmware_class loader test") Fixes: eb910947c82f9 ("test: firmware_class: add asynchronous request trigger") Fixes: 061132d2b9c95 ("test_firmware: add test custom fallback trigger") Fixes: 7feebfa487b92 ("test_firmware: add support for request_firmware_into_buf") Link: https://lore.kernel.org/all/20230606070808.9300-1-mirsad.todorovac@alu.unizg... Signed-off-by: Mirsad Todorovac mirsad.todorovac@alu.unizg.hr
[ This is the backport of the patch to specific to the 5.4 branch. There are no ] [ semantic differences in the commit when compared to upstream, only fewer instances ] [ of error code replacement. Backport is provided for completeness sake ] [ so it would apply to all of the supported LTS kernels. ] --- v3: fixed a minor typo. no change to commit.
v2: tested on 5.4 stable build.
lib/test_firmware.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 92d7195d5b5b..dd3850ec1dfa 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -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,