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um: Fix len of file in create_pid_file
sizeof gives us the size of the pointer variable, not of the area it points to. So the number of bytes copied by umid_file_name() is 8. We should pass in the correct length of the file buffer. Signed-off-by: Wen Yang <wenyang@linux.alibaba.com> Signed-off-by: Richard Weinberger <richard@nod.at>
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1 changed files with 3 additions and 2 deletions
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@ -220,11 +220,12 @@ static void __init create_pid_file(void)
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char pid[sizeof("nnnnn\0")], *file;
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int fd, n;
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file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
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n = strlen(uml_dir) + UMID_LEN + sizeof("/pid\0");
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file = malloc(n);
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if (!file)
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return;
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if (umid_file_name("pid", file, sizeof(file)))
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if (umid_file_name("pid", file, n))
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goto out;
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fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
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