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kimage_file_prepare_segments(): don't open-code memdup_user()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-05-13 18:39:01 -04:00
parent 30e7e3ecf3
commit a9bd8dfa53
1 changed files with 4 additions and 10 deletions
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14
kernel/kexec_file.c
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@ -162,16 +162,10 @@ kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd,
}
if (cmdline_len) {
image->cmdline_buf = kzalloc(cmdline_len, GFP_KERNEL);
if (!image->cmdline_buf) {
ret = -ENOMEM;
goto out;
}
ret = copy_from_user(image->cmdline_buf, cmdline_ptr,
cmdline_len);
if (ret) {
ret = -EFAULT;
image->cmdline_buf = memdup_user(cmdline_ptr, cmdline_len);
if (IS_ERR(image->cmdline_buf)) {
ret = PTR_ERR(image->cmdline_buf);
image->cmdline_buf = NULL;
goto out;
}