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fs-verity: use u64_to_user_ptr()

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<linux/kernel.h> already provides a macro u64_to_user_ptr().
Use it instead of open-coding the two casts.

No change in behavior.

Link: https://lore.kernel.org/r/20191231175408.20524-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers
2019-12-31 11:54:08 -06:00
parent 439bea104c
commit da3a3da4e6
1 changed files with 2 additions and 4 deletions
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6
fs/verity/enable.c
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@@ -216,8 +216,7 @@ static int enable_verity(struct file *filp,
/* Get the salt if the user provided one */ /* Get the salt if the user provided one */
if (arg->salt_size && if (arg->salt_size &&
copy_from_user(desc->salt, copy_from_user(desc->salt, u64_to_user_ptr(arg->salt_ptr),
(const u8 __user *)(uintptr_t)arg->salt_ptr,
arg->salt_size)) { arg->salt_size)) {
err = -EFAULT; err = -EFAULT;
goto out; goto out;
@@ -226,8 +225,7 @@ static int enable_verity(struct file *filp,
/* Get the signature if the user provided one */ /* Get the signature if the user provided one */
if (arg->sig_size && if (arg->sig_size &&
copy_from_user(desc->signature, copy_from_user(desc->signature, u64_to_user_ptr(arg->sig_ptr),
(const u8 __user *)(uintptr_t)arg->sig_ptr,
arg->sig_size)) { arg->sig_size)) {
err = -EFAULT; err = -EFAULT;
goto out; goto out;