kdb: Fix handling of kallsyms_symbol_next() return value
kallsyms_symbol_next() returns a boolean (true on success). Currently kdb_read() tests the return value with an inequality that unconditionally evaluates to true. This is fixed in the obvious way and, since the conditional branch is supposed to be unreachable, we also add a WARN_ON(). Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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@ -350,7 +350,7 @@ static char *kdb_read(char *buffer, size_t bufsize)
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}
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kdb_printf("\n");
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for (i = 0; i < count; i++) {
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if (kallsyms_symbol_next(p_tmp, i) < 0)
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if (WARN_ON(!kallsyms_symbol_next(p_tmp, i)))
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break;
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kdb_printf("%s ", p_tmp);
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*(p_tmp + len) = '\0';
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