Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
io_uring: Replace kzalloc() + copy_from_user() with memdup_user()
Replace kzalloc() followed by copy_from_user() with memdup_user() to
improve and simplify io_probe().
No functional changes intended.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
authored by
Thorsten Blum
and committed by
Jens Axboe
7b0604d7
473efbc3
+3
-7
+3
-7
io_uring/register.c
+3
-7
io_uring/register.c
···
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nr_args = IORING_OP_LAST;
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size = struct_size(p, ops, nr_args);
50
-
p = kzalloc(size, GFP_KERNEL);
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-
if (!p)
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-
return -ENOMEM;
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-
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-
ret = -EFAULT;
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-
if (copy_from_user(p, arg, size))
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-
goto out;
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+
p = memdup_user(arg, size);
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+
if (IS_ERR(p))
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+
return PTR_ERR(p);
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ret = -EINVAL;
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if (memchr_inv(p, 0, size))
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goto out;