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xfer: fix out-of-bounds read in xfer_chat_recv_cb on empty line (#2323)
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@@ -162,7 +162,7 @@ xfer_chat_recv_cb (const void *pointer, void *data, int fd)
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{
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ctcp_action = 0;
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length = strlen (ptr_buf);
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if (ptr_buf[length - 1] == '\r')
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if ((length > 0) && (ptr_buf[length - 1] == '\r'))
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{
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ptr_buf[length - 1] = '\0';
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length--;
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