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authorGeliang Tang <geliangtang@gmail.com>2017-06-02 13:52:05 +0000
committerIngo Molnar <mingo@kernel.org>2017-06-05 17:50:42 +0200
commit5f72cad65cfaac5e40d0de8b7f48ee647af69cd5 (patch)
tree372d88d129d9bff7eba39bb5dfa5746c78bd7cda /drivers/firmware
parent2959c95d510cc45b246ba727eb8fdf8b601c6eec (diff)
efi/efi_test: Use memdup_user() helper
Use memdup_user() helper instead of open-coding to simplify the code. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Ivan Hu <ivan.hu@canonical.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20170602135207.21708-12-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/test/efi_test.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index 8cd578f62059..08129b7b80ab 100644
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -71,18 +71,13 @@ copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
if (!access_ok(VERIFY_READ, src, 1))
return -EFAULT;
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf) {
+ buf = memdup_user(src, len);
+ if (IS_ERR(buf)) {
*dst = NULL;
- return -ENOMEM;
+ return PTR_ERR(buf);
}
*dst = buf;
- if (copy_from_user(*dst, src, len)) {
- kfree(buf);
- return -EFAULT;
- }
-
return 0;
}